Khalid M. Mousa - Academia.edu (original) (raw)

Papers by Khalid M. Mousa

American journal of chemical engineering, 2016

Conventional treatment of textile wastewater such as biological treatment discharges will no long... more Conventional treatment of textile wastewater such as biological treatment discharges will no longer be tolerated and identified as non-biodegradable. Advanced processes such as adsorption and advanced oxidation hold great promise to provide alternative for better treatment and protection of environment. In this study, adsorption process is carried out for both batch (kinetic and isotherm) studies using natural wheat straw (NWS) as low cost adsorbent, modified wheat straw (MWS) and Activated Carbon (AC) for comparing the results. Batch adsorption experiments were conducted on a shaker at 200 rpm, room temperature using 250 mL conical flasks contains 100 mL of dye solution to study the effects of adsorption conditions. The effect of pH was determined by adjusting pH values (2.5-10.5). To study the effect of initial dye concentration, six different concentrations of reactive blue dye (5, 20, 30, 50, 70 and 90) mg/L were prepared and used. Results showed that the removal percent using NWS, MWS and AC are; 68%, 92.17% and 90.5% respectively. Equilibrium isotherm experiment were carried at different dosages (0.1-1 g) to predict the isotherm model; Langmuir, Freundlich and BET. The experimental data showed that reactive blue is fitted with Freundlich isotherm (1/n = 1.25, 0.67) for both (NWS) and (MWS) respectively, and for (AC) is fitted with Langmuir isotherm. Three kinetic models, were selected to fit the kinetic data; pseudo first, second order and intraparticle diffusion, reactive blue is fitted with intra-particle diffusion model with (NWS) and (MWS), and Pseudo second order for (AC).

مجلة البحوث و الدراسات النفطية, Jun 1, 2016

The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields,... more The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields, using stainless steel autoclave. A series of experiments were carried out at different conditions, temperature, pressure, acidity, revolution per minute (RPM) and salinity with and without flocculation .The result showed that 93% of oil was removed. An improvement was conducted when using surfactants.

Al-Qadisiyah Journal for Engineering Sciences, 2012

A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experi... more A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experimental and modeling investigation was conducted to study the dynamics ofsaponificationreaction using the flow rate of cooling water and Ethel acetate as forced function and the concentration of sodium acetate and temperature as response variables.The system identification was conducted and the results showed that the multi input multi output system can be represented by the following matrix

American journal of chemical engineering, 2015

Due to multi input multi output variables affected the continuous stirred tank reactor its worthy... more Due to multi input multi output variables affected the continuous stirred tank reactor its worthy to use the state space model to study the dynamics of this system. In this work, a saponifecation process was studded on which Ethel acetate was reacted with sodium hydroxide to produced sodium acetate and ethanol. one litter operation volume CSTR was used, the flow rate of Ethel acetate and cooling water were toke as disturbance variables and the concentration of sodium acetate and the temperature of reactor as response variables. The results show improvement compared with linearized model.

Al-Nahrain Journal for Engineering Sciences, Mar 24, 2019

In this study sunlight and UV radiation were used to compare the efficiency of decolorization of ... more In this study sunlight and UV radiation were used to compare the efficiency of decolorization of textile wastewater containing brilliant reactive red dye K-2BP (λmax = 534 nm) by the advanced oxidation process (AOP) using (H2O2/sunlight, H2O2/UV, H2O2/TiO2/sunlight, and H2O2/TiO2/UV). The results studied the effect of solution pH, applied H2O2 concentration, TiO2 concentration (nanoparticle), and initial dye concentration were studied. The experimental results showed that decolorization percentage with H2O2/sunlight and TiO2/H2O2/sunlight under the following conditions:-reaction time 150 of minutes, [ 500 ppm] H2O2, [100 ppm] TiO2, pH=3, initial dye concentration =15 ppm and at ambient temperature were 95.7% and 98.42% respectively. For the same conditions using H2O2/UV, H2O2/TiO2 /UV, the percentage of decolorization were 97.85% and 96.33% respectively. The results also indicated that the sunlight is more economic and cost-effective than UV radiation.

Iraqi journal of chemical and petroleum engineering, Jun 30, 2010

Spent catalysts for sulfuric acid production have large amount of vanadium and due to environment... more Spent catalysts for sulfuric acid production have large amount of vanadium and due to environmental authority it is required to reduce the vanadium contain of the spent catalyst. Experimental investigation was conducted to study the vanadium recovery from spent catalyst via leaching process using sodium hydroxide to study the effect of process variables (temperatures, sodium hydroxide molarities, leaching time and particle size) on vanadium recovery. The effect of process variables (temperature, particle size,molarities of sodium hydroxide and leaching time) on the percentages of vanadium recovery were investigated and discussed .It was found that the percentage of vanadium recovery increased with increasing temperature up to 100 , increasing sodium hydroxide molarity from 2 to 4M, increasing leaching time, decreasing particle size from mesh 150, 100 and 65. A complete vanadium recovery was achieved at the following conditions: temperature (100˚c), particle size (150 mesh) molarity of Na OH(4 molar) and leaching time(5 h).

DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2009

In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leac... more In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leaching with NaOH solution from previous work of Mosa (1999). The selected data were chosen at particle size of scale between 125 to 200 µm, temperature 343 to 373 K, reaction (leaching) time up to 8 hours and at about fixed NaOH solution molarity (3 to 4 M).The results show that vanadium recovery increased with time and temperature and mostly decreased with particle size.A second order polynomial mathematical correlation was employed to describe vanadium recovery response. The correlation coefficient of the obtained correlation was 0.9990 and variance of 0.9981 with confidence levels of 95 %.Kinetic study shows that the chemical reaction is the controlling step which has the highest resistance among other steps. A chemical reaction order was found equals to-3 with activation energy of 1080 J/ mole and frequency factor of about 2.6884.

Al-Nahrain Journal for Engineering Sciences, Jun 25, 2021

The intention of this study was to explore the efficiency and feasibility of adsorption of Reacti... more The intention of this study was to explore the efficiency and feasibility of adsorption of Reactive Blue dye (H3R) used in textile industries using Raw wheat straw (RWS) and Modified wheat straw (MWS) as a low-cost adsorbent. Wheat straw was modified using cationic surfactant (CTAB) to study the improvement of dye removal. The properties of Raw and Modified wheat straw are studied by means of Fourier transform infrared (FTIR) and scanning electron microscope (SEM) analyses to determine the functional groups and the nature of their surface. Continuous experiments were done by fixedbed column to study the characteristics of the breakthrough curve using different bed heights and flow rates. Results showed that the breakthrough time increases with increasing bed height and decreasing flow rate, in turn results into higher removal capacity. Results also showed a higher flow rate lead a lower adsorption capacity due to insufficient residence time. Bed depth service time model (BDST), Adam-Bohart and Thomas models were used to predict the breakthrough curves and to determine the adsorption capacity of the column. The highest bed capacity of 12.95 and 32.2 mg/g for MWS was obtained using 10 mg/L, 10 cm bed height at 10 mL/min and 30 mL/min respectively.

Petroleum science and engineering, Mar 1, 2017

In this study, the adsorption of reactive yellow dye which is one of the most commonly used solub... more In this study, the adsorption of reactive yellow dye which is one of the most commonly used soluble dyes in textile industries was studied using modified wheat straw, the surface of raw wheat straw was modified with a cationic surfactant CTAB. to understand the adsorption behavior of the reactive yellow, dye the adsorption kinetics and the adsorption isotherm studies have been investigated. Batch experiments was carried out with an initial concentration of 10 mg/L with 0.5 gm of adsorbent to study the contact time of equilibrium and then the adsorption mechanism process using three kinetic models; Pseudo-first, second order and intra-particle model. Isotherm studies was carried out at three different adsorbent amounts (0.1, 0.2, 0.4, 0.6, 0.8 and 1.0) gm to predict the type of adsorption process on the surface (chemical or physical) using three isotherm models; Langmuir, Freundlich and BET models. The results showed that the pseudo-second order is best fitted, intra-particle diffusion kinetic model fitted well to experimental data and is not the only controlling step of adsorption rate, and the adsorption isotherm follows both Langmuir and Freundlich models referring to the chemical adsorption.

Journal of Chemical Engineering & Process Technology, 2015

Conventional treatment of textile wastewater such as biological treatment discharges will no long... more Conventional treatment of textile wastewater such as biological treatment discharges will no longer be tolerated and identified as non-biodegradable. Advanced processes such as adsorption and advanced oxidation hold great promise to provide alternative for better treatment and protection of environment. In this study, adsorption process is carried out for both batch (kinetic and isotherm) studies using natural wheat straw (NWS) as low cost adsorbent, modified wheat straw (MWS) and Activated Carbon (AC) for comparing the results. Batch adsorption experiments were conducted on a shaker at 200 rpm, room temperature using 250 mL conical flasks contains 100 mL of dye solution to study the effects of adsorption conditions. The effect of pH was determined by adjusting pH values (2.5-10.5). To study the effect of initial dye concentration, six different concentrations of reactive blue dye (5, 20, 30, 50, 70 and 90) mg/L were prepared and used. Results showed that the removal percent using NWS, MWS and AC are; 68%, 92.17% and 90.5% respectively. Equilibrium isotherm experiment were carried at different dosages (0.1-1 g) to predict the isotherm model; Langmuir, Freundlich and BET. The experimental data showed that reactive blue is fitted with Freundlich isotherm (1/n = 1.25, 0.67) for both (NWS) and (MWS) respectively, and for (AC) is fitted with Langmuir isotherm. Three kinetic models, were selected to fit the kinetic data; pseudo first, second order and intraparticle diffusion, reactive blue is fitted with intra-particle diffusion model with (NWS) and (MWS), and Pseudo second order for (AC).

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2017

DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2010

Experimental investigation was conducted to study the dynamics of double-pipe heat exchanger usin... more Experimental investigation was conducted to study the dynamics of double-pipe heat exchanger using step change in flow rate of hot water and observe its effect on the temperature of cold water and it was found that the transfer function can be represented by first order system plus dead time (FOPDT). MATLAB 7.4 simulation and programming was used to show the response of close-loop system using P, PI, PID and fuzzy logic control. The Smith predictor was used to remove the effect of transport delay on the process and it was found that this method greatly improve the response of the system. The stability of the overall closed loop system was proved by using Bod plot diagram.

Journal of Chemical Engineering & Process Technology, 2015

The oil drilling operations create large quantities of contaminated water known as "Produced Wate... more The oil drilling operations create large quantities of contaminated water known as "Produced Water". The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields (Iraq), using stainless steel autoclave. A series of experiments were carried out, firstly pretreatment to remove solid particles using sedimentation with and without flocculation, secondly study the effect of pH, pressure, temperature, salinity, operation time, outlet time and RPM. The ranges of salinity, pH, pressure and temperature were selected according to the PW conditions which out from dehydrator and desalter as follow: 80000 ppm, 6,3 bar and 60°C respectively, finally sorbents (polypropylene, polyethylene, used plastic and sawdust) were used. The results showed a great improvement in the oil recovery percent (all the oil was recovered) when using sorbents.

مجلة البحوث و الدراسات النفطية, May 5, 2021

The fly ash of the residue of fired power station contains percentage of some valuable material. ... more The fly ash of the residue of fired power station contains percentage of some valuable material. Their recovery is important regarding the environmental limitations and economically .The process of nickel recovery from ash using nitric acid was conducted. The effect of temperature ,acid concentration and time was studied and the limiting step was found .

Recovery of molybdenum from spent hydrodesulphurization (HDS) catalyst Ni, Mo/Al2O3 of light naph... more Recovery of molybdenum from spent hydrodesulphurization (HDS) catalyst Ni, Mo/Al2O3 of light naphtha was studied using 1 L st.st autoclave reactor. Theoretical and experimental investigation were conducted to study the effect of process all variables. Auto clave reactor used in these experiments was designed and fabricated by researchers group of this work. Experiment design was used by using D-optimal method to reduce the number of the experiments. The optimum leaching conditions (P = 7 bar, T = 77-100 °C, C = 2.333M, P.S.R = 400 μm, MS = 600 rpm and t = 1 h), it is possible to extract 93% of molybdenum from the spent catalyst. Second order polynomial mathematical correlation was employed in the range of the experiments variable by using PLS method with correlation factor of 0.976. Diffusion Reaction Model (DRM) of non-catalytic liquid-solid reaction was discussed. The model equations have been solved by orthogonal collocation and Fifth Order Improved Runge-Kutta Schemes method. The parameters of the model have been estimated by the excess method of analysis. The calculated results based on this model are in good agreement with experimental data.

Journal of Petroleum Research and Studies, 2016

The oil drilling operations large quantities of contaminted water known as "produced water&q... more The oil drilling operations large quantities of contaminted water known as "produced water" . The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields,using stainless steel autoclave. A series of experiments were carried out at different conditions,temperature, pressure, acidity, revolution per minute (RPM) and salinity with and without flocculation.The result showed that 93% of oil was removed. An improvement was conducted when usingsurfactants.

A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experi... more A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experimental and modeling investigation was conducted to study the dynamics ofsaponificationreaction using the flow rate of cooling water and Ethel acetate as forced function and the concentration of sodium acetate and temperature as response variables.The system identification was conducted and the results showed that the multi input multi output system can be represented by the following matrix

مجلة النهرين للعلوم الهندسية, 2009

In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leac... more In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leaching with NaOH solution from previous work of Mosa (1999). The selected data were chosen at particle size of scale between 125 to 200 μm, temperature 343 to 373 K, reaction (leaching) time up to 8 hours and at about fixed NaOH solution molarity (3 to 4 M).The results show that vanadium recovery increased with time and temperature and mostly decreased with particle size.A second order polynomial mathematical correlation was employed to describe vanadium recovery response. The correlation coefficient of the obtained correlation was 0.9990 and variance of 0.9981 with confidence levels of 95 %.Kinetic study shows that the chemical reaction is the controlling step which has the highest resistance among other steps. A chemical reaction order was found equals to -3 with activation energy of 1080 J/ mole and frequency factor of about 2.6884

مجلة النهرين للعلوم الهندسية, 2017

A non linearity, interaction and complexity in modeling lead to a great difficulties in CSTR cont... more A non linearity, interaction and complexity in modeling lead to a great difficulties in CSTR control system, this paper interested in CSTR control using PID, fuzzy logic and intelligent control strategies. Water flow rate and ethyl acetate were selected as manipulated variables while sodium acetate and reactor temperature as controlled variables. Firstly the system identification was conducted and the results show that the multi input multi output system can be represented by the following matrix The compare among the strategies show preference of fuzzy control.

American journal of chemical engineering, 2016

Conventional treatment of textile wastewater such as biological treatment discharges will no long... more Conventional treatment of textile wastewater such as biological treatment discharges will no longer be tolerated and identified as non-biodegradable. Advanced processes such as adsorption and advanced oxidation hold great promise to provide alternative for better treatment and protection of environment. In this study, adsorption process is carried out for both batch (kinetic and isotherm) studies using natural wheat straw (NWS) as low cost adsorbent, modified wheat straw (MWS) and Activated Carbon (AC) for comparing the results. Batch adsorption experiments were conducted on a shaker at 200 rpm, room temperature using 250 mL conical flasks contains 100 mL of dye solution to study the effects of adsorption conditions. The effect of pH was determined by adjusting pH values (2.5-10.5). To study the effect of initial dye concentration, six different concentrations of reactive blue dye (5, 20, 30, 50, 70 and 90) mg/L were prepared and used. Results showed that the removal percent using NWS, MWS and AC are; 68%, 92.17% and 90.5% respectively. Equilibrium isotherm experiment were carried at different dosages (0.1-1 g) to predict the isotherm model; Langmuir, Freundlich and BET. The experimental data showed that reactive blue is fitted with Freundlich isotherm (1/n = 1.25, 0.67) for both (NWS) and (MWS) respectively, and for (AC) is fitted with Langmuir isotherm. Three kinetic models, were selected to fit the kinetic data; pseudo first, second order and intraparticle diffusion, reactive blue is fitted with intra-particle diffusion model with (NWS) and (MWS), and Pseudo second order for (AC).

مجلة البحوث و الدراسات النفطية, Jun 1, 2016

The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields,... more The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields, using stainless steel autoclave. A series of experiments were carried out at different conditions, temperature, pressure, acidity, revolution per minute (RPM) and salinity with and without flocculation .The result showed that 93% of oil was removed. An improvement was conducted when using surfactants.

Al-Qadisiyah Journal for Engineering Sciences, 2012

A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experi... more A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experimental and modeling investigation was conducted to study the dynamics ofsaponificationreaction using the flow rate of cooling water and Ethel acetate as forced function and the concentration of sodium acetate and temperature as response variables.The system identification was conducted and the results showed that the multi input multi output system can be represented by the following matrix

American journal of chemical engineering, 2015

Due to multi input multi output variables affected the continuous stirred tank reactor its worthy... more Due to multi input multi output variables affected the continuous stirred tank reactor its worthy to use the state space model to study the dynamics of this system. In this work, a saponifecation process was studded on which Ethel acetate was reacted with sodium hydroxide to produced sodium acetate and ethanol. one litter operation volume CSTR was used, the flow rate of Ethel acetate and cooling water were toke as disturbance variables and the concentration of sodium acetate and the temperature of reactor as response variables. The results show improvement compared with linearized model.

Al-Nahrain Journal for Engineering Sciences, Mar 24, 2019

In this study sunlight and UV radiation were used to compare the efficiency of decolorization of ... more In this study sunlight and UV radiation were used to compare the efficiency of decolorization of textile wastewater containing brilliant reactive red dye K-2BP (λmax = 534 nm) by the advanced oxidation process (AOP) using (H2O2/sunlight, H2O2/UV, H2O2/TiO2/sunlight, and H2O2/TiO2/UV). The results studied the effect of solution pH, applied H2O2 concentration, TiO2 concentration (nanoparticle), and initial dye concentration were studied. The experimental results showed that decolorization percentage with H2O2/sunlight and TiO2/H2O2/sunlight under the following conditions:-reaction time 150 of minutes, [ 500 ppm] H2O2, [100 ppm] TiO2, pH=3, initial dye concentration =15 ppm and at ambient temperature were 95.7% and 98.42% respectively. For the same conditions using H2O2/UV, H2O2/TiO2 /UV, the percentage of decolorization were 97.85% and 96.33% respectively. The results also indicated that the sunlight is more economic and cost-effective than UV radiation.

Iraqi journal of chemical and petroleum engineering, Jun 30, 2010

Spent catalysts for sulfuric acid production have large amount of vanadium and due to environment... more Spent catalysts for sulfuric acid production have large amount of vanadium and due to environmental authority it is required to reduce the vanadium contain of the spent catalyst. Experimental investigation was conducted to study the vanadium recovery from spent catalyst via leaching process using sodium hydroxide to study the effect of process variables (temperatures, sodium hydroxide molarities, leaching time and particle size) on vanadium recovery. The effect of process variables (temperature, particle size,molarities of sodium hydroxide and leaching time) on the percentages of vanadium recovery were investigated and discussed .It was found that the percentage of vanadium recovery increased with increasing temperature up to 100 , increasing sodium hydroxide molarity from 2 to 4M, increasing leaching time, decreasing particle size from mesh 150, 100 and 65. A complete vanadium recovery was achieved at the following conditions: temperature (100˚c), particle size (150 mesh) molarity of Na OH(4 molar) and leaching time(5 h).

DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2009

In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leac... more In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leaching with NaOH solution from previous work of Mosa (1999). The selected data were chosen at particle size of scale between 125 to 200 µm, temperature 343 to 373 K, reaction (leaching) time up to 8 hours and at about fixed NaOH solution molarity (3 to 4 M).The results show that vanadium recovery increased with time and temperature and mostly decreased with particle size.A second order polynomial mathematical correlation was employed to describe vanadium recovery response. The correlation coefficient of the obtained correlation was 0.9990 and variance of 0.9981 with confidence levels of 95 %.Kinetic study shows that the chemical reaction is the controlling step which has the highest resistance among other steps. A chemical reaction order was found equals to-3 with activation energy of 1080 J/ mole and frequency factor of about 2.6884.

Al-Nahrain Journal for Engineering Sciences, Jun 25, 2021

The intention of this study was to explore the efficiency and feasibility of adsorption of Reacti... more The intention of this study was to explore the efficiency and feasibility of adsorption of Reactive Blue dye (H3R) used in textile industries using Raw wheat straw (RWS) and Modified wheat straw (MWS) as a low-cost adsorbent. Wheat straw was modified using cationic surfactant (CTAB) to study the improvement of dye removal. The properties of Raw and Modified wheat straw are studied by means of Fourier transform infrared (FTIR) and scanning electron microscope (SEM) analyses to determine the functional groups and the nature of their surface. Continuous experiments were done by fixedbed column to study the characteristics of the breakthrough curve using different bed heights and flow rates. Results showed that the breakthrough time increases with increasing bed height and decreasing flow rate, in turn results into higher removal capacity. Results also showed a higher flow rate lead a lower adsorption capacity due to insufficient residence time. Bed depth service time model (BDST), Adam-Bohart and Thomas models were used to predict the breakthrough curves and to determine the adsorption capacity of the column. The highest bed capacity of 12.95 and 32.2 mg/g for MWS was obtained using 10 mg/L, 10 cm bed height at 10 mL/min and 30 mL/min respectively.

Petroleum science and engineering, Mar 1, 2017

In this study, the adsorption of reactive yellow dye which is one of the most commonly used solub... more In this study, the adsorption of reactive yellow dye which is one of the most commonly used soluble dyes in textile industries was studied using modified wheat straw, the surface of raw wheat straw was modified with a cationic surfactant CTAB. to understand the adsorption behavior of the reactive yellow, dye the adsorption kinetics and the adsorption isotherm studies have been investigated. Batch experiments was carried out with an initial concentration of 10 mg/L with 0.5 gm of adsorbent to study the contact time of equilibrium and then the adsorption mechanism process using three kinetic models; Pseudo-first, second order and intra-particle model. Isotherm studies was carried out at three different adsorbent amounts (0.1, 0.2, 0.4, 0.6, 0.8 and 1.0) gm to predict the type of adsorption process on the surface (chemical or physical) using three isotherm models; Langmuir, Freundlich and BET models. The results showed that the pseudo-second order is best fitted, intra-particle diffusion kinetic model fitted well to experimental data and is not the only controlling step of adsorption rate, and the adsorption isotherm follows both Langmuir and Freundlich models referring to the chemical adsorption.

Journal of Chemical Engineering & Process Technology, 2015

Conventional treatment of textile wastewater such as biological treatment discharges will no long... more Conventional treatment of textile wastewater such as biological treatment discharges will no longer be tolerated and identified as non-biodegradable. Advanced processes such as adsorption and advanced oxidation hold great promise to provide alternative for better treatment and protection of environment. In this study, adsorption process is carried out for both batch (kinetic and isotherm) studies using natural wheat straw (NWS) as low cost adsorbent, modified wheat straw (MWS) and Activated Carbon (AC) for comparing the results. Batch adsorption experiments were conducted on a shaker at 200 rpm, room temperature using 250 mL conical flasks contains 100 mL of dye solution to study the effects of adsorption conditions. The effect of pH was determined by adjusting pH values (2.5-10.5). To study the effect of initial dye concentration, six different concentrations of reactive blue dye (5, 20, 30, 50, 70 and 90) mg/L were prepared and used. Results showed that the removal percent using NWS, MWS and AC are; 68%, 92.17% and 90.5% respectively. Equilibrium isotherm experiment were carried at different dosages (0.1-1 g) to predict the isotherm model; Langmuir, Freundlich and BET. The experimental data showed that reactive blue is fitted with Freundlich isotherm (1/n = 1.25, 0.67) for both (NWS) and (MWS) respectively, and for (AC) is fitted with Langmuir isotherm. Three kinetic models, were selected to fit the kinetic data; pseudo first, second order and intraparticle diffusion, reactive blue is fitted with intra-particle diffusion model with (NWS) and (MWS), and Pseudo second order for (AC).

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2017

DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2010

Experimental investigation was conducted to study the dynamics of double-pipe heat exchanger usin... more Experimental investigation was conducted to study the dynamics of double-pipe heat exchanger using step change in flow rate of hot water and observe its effect on the temperature of cold water and it was found that the transfer function can be represented by first order system plus dead time (FOPDT). MATLAB 7.4 simulation and programming was used to show the response of close-loop system using P, PI, PID and fuzzy logic control. The Smith predictor was used to remove the effect of transport delay on the process and it was found that this method greatly improve the response of the system. The stability of the overall closed loop system was proved by using Bod plot diagram.

Journal of Chemical Engineering & Process Technology, 2015

The oil drilling operations create large quantities of contaminated water known as "Produced Wate... more The oil drilling operations create large quantities of contaminated water known as "Produced Water". The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields (Iraq), using stainless steel autoclave. A series of experiments were carried out, firstly pretreatment to remove solid particles using sedimentation with and without flocculation, secondly study the effect of pH, pressure, temperature, salinity, operation time, outlet time and RPM. The ranges of salinity, pH, pressure and temperature were selected according to the PW conditions which out from dehydrator and desalter as follow: 80000 ppm, 6,3 bar and 60°C respectively, finally sorbents (polypropylene, polyethylene, used plastic and sawdust) were used. The results showed a great improvement in the oil recovery percent (all the oil was recovered) when using sorbents.

مجلة البحوث و الدراسات النفطية, May 5, 2021

The fly ash of the residue of fired power station contains percentage of some valuable material. ... more The fly ash of the residue of fired power station contains percentage of some valuable material. Their recovery is important regarding the environmental limitations and economically .The process of nickel recovery from ash using nitric acid was conducted. The effect of temperature ,acid concentration and time was studied and the limiting step was found .

Recovery of molybdenum from spent hydrodesulphurization (HDS) catalyst Ni, Mo/Al2O3 of light naph... more Recovery of molybdenum from spent hydrodesulphurization (HDS) catalyst Ni, Mo/Al2O3 of light naphtha was studied using 1 L st.st autoclave reactor. Theoretical and experimental investigation were conducted to study the effect of process all variables. Auto clave reactor used in these experiments was designed and fabricated by researchers group of this work. Experiment design was used by using D-optimal method to reduce the number of the experiments. The optimum leaching conditions (P = 7 bar, T = 77-100 °C, C = 2.333M, P.S.R = 400 μm, MS = 600 rpm and t = 1 h), it is possible to extract 93% of molybdenum from the spent catalyst. Second order polynomial mathematical correlation was employed in the range of the experiments variable by using PLS method with correlation factor of 0.976. Diffusion Reaction Model (DRM) of non-catalytic liquid-solid reaction was discussed. The model equations have been solved by orthogonal collocation and Fifth Order Improved Runge-Kutta Schemes method. The parameters of the model have been estimated by the excess method of analysis. The calculated results based on this model are in good agreement with experimental data.

Journal of Petroleum Research and Studies, 2016

The oil drilling operations large quantities of contaminted water known as "produced water&q... more The oil drilling operations large quantities of contaminted water known as "produced water" . The present study aims to treatment of produced water of the North Rumaila and Zubair oil fields,using stainless steel autoclave. A series of experiments were carried out at different conditions,temperature, pressure, acidity, revolution per minute (RPM) and salinity with and without flocculation.The result showed that 93% of oil was removed. An improvement was conducted when usingsurfactants.

A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experi... more A continuous stirredtank reactor is a measure unit operation in industrial engineering. An experimental and modeling investigation was conducted to study the dynamics ofsaponificationreaction using the flow rate of cooling water and Ethel acetate as forced function and the concentration of sodium acetate and temperature as response variables.The system identification was conducted and the results showed that the multi input multi output system can be represented by the following matrix

مجلة النهرين للعلوم الهندسية, 2009

In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leac... more In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leaching with NaOH solution from previous work of Mosa (1999). The selected data were chosen at particle size of scale between 125 to 200 μm, temperature 343 to 373 K, reaction (leaching) time up to 8 hours and at about fixed NaOH solution molarity (3 to 4 M).The results show that vanadium recovery increased with time and temperature and mostly decreased with particle size.A second order polynomial mathematical correlation was employed to describe vanadium recovery response. The correlation coefficient of the obtained correlation was 0.9990 and variance of 0.9981 with confidence levels of 95 %.Kinetic study shows that the chemical reaction is the controlling step which has the highest resistance among other steps. A chemical reaction order was found equals to -3 with activation energy of 1080 J/ mole and frequency factor of about 2.6884

مجلة النهرين للعلوم الهندسية, 2017

A non linearity, interaction and complexity in modeling lead to a great difficulties in CSTR cont... more A non linearity, interaction and complexity in modeling lead to a great difficulties in CSTR control system, this paper interested in CSTR control using PID, fuzzy logic and intelligent control strategies. Water flow rate and ethyl acetate were selected as manipulated variables while sodium acetate and reactor temperature as controlled variables. Firstly the system identification was conducted and the results show that the multi input multi output system can be represented by the following matrix The compare among the strategies show preference of fuzzy control.