MOSES AROWO | Moi University (original) (raw)

Papers by MOSES AROWO

2021 International Conference on Smart City and Green Energy (ICSCGE), 2021

This research article is a strategic and well holistic document to guide both national and county... more This research article is a strategic and well holistic document to guide both national and county governments to achieve 100% energy access and prioritize sustainable energy transition besides creating many green jobs and enterprises. It shall also form a very primary document and basis for every investor across the various opportunities and, in particular, energy generation and distribution. Energy is the prime engine of economic growth; its planning signals a direct positive impact on social welfare, economic activities, socio-political development, environmental sustainability. This article uses Low Emissions Analysis Platform (LEAP) software to provide the respective Medium-Term Plan (MTP) & Long-Term Plan (LTP) Update for the period 2019 (base year) to 2030. This MTP is the identification and analysis of suitable expansion paths of the country’s power system for that period, complying with the defined planning criteria and framework. This encompasses (i) examining of yesteryear electricity demand and advancement of future insistence scenarios; (ii) analysis of favorable expansion candidate fuels and technologies plus their scheduling; (iii) modeling of their anticipated addition to the prospective power generation and the expedient operation of the generation system for the year 2030. The key recommendation is that the Government of Kenya ought to determine means to sustainably expedite broad-based development in the MTP - implying stable and sufficient energy (including but not limited to grid electricity) supply to cater to growing demand.

Journal of Energy

Gadam sorghum stalks are agricultural residues which can be hydrolyzed into fermentable sugars th... more Gadam sorghum stalks are agricultural residues which can be hydrolyzed into fermentable sugars that can be used to produce bioethanol which is a renewable source of energy. In order to produce bioethanol from lignocellulosic biomass such as Gadam sorghum stalks, several processes including hydrolysis are involved. However, the use of lignocellulosic biomass for bioethanol production is hindered by the low yield of fermentable sugars obtained during hydrolysis. The lack of sufficient information on optimal conditions governing hydrolysis of lignocellulosic biomass leads to inefficient process which hinders the economic viability of large-scale bioethanol production. The objective of this study was to optimize reaction conditions involved in concentrated sulphuric acid hydrolysis of Gadam sorghum stalks. During hydrolysis, the conditions that were varied included temperature (40°C–80°C), time (30-90 minutes), and concentration of acid (30%-70%, w / w ). Central composite rotatable des...

Journal of Water Process Engineering

Powder Technology, 2015

The preparation of basic magnesium carbonate (BMC) by the simultaneous absorption of NH 3 and CO ... more The preparation of basic magnesium carbonate (BMC) by the simultaneous absorption of NH 3 and CO 2 into MgCl 2 solution in a rotating packed bed (RPB) was studied. The influences of the operating conditions including the rotation speed, liquid volumetric flow rate, gas volumetric flow rate, reaction temperature and initial concentration of MgCl 2 solution on the crystal structure and morphology of BMC were investigated. The scanning electron microscope image of the as-prepared BMC showed that the BMC particles had a unique rose-like structure with a mean size of 5.3 μm, a petal thickness of 20 nm and a particle size distribution mainly in the range of 2.8-7 μm.

Chemical Engineering Science, 2015

Liquid flow of water and microemulsion in a rotor-stator reactor (RSR) was studied. A high-speed ... more Liquid flow of water and microemulsion in a rotor-stator reactor (RSR) was studied. A high-speed camera was used to obtain continuous and clear images of liquid flow. Diameter of droplets reduced with increasing layers of rotor-ring/stator-ring. Velocity of droplets rose with increasing layers of rotor-ring/stator-ring. Correlations were established to predict the diameter and velocity of droplets.

Chemical Engineering Science, 2015

A rotating packed bed (RPB) has received considerable attention of many researchers due to its hi... more A rotating packed bed (RPB) has received considerable attention of many researchers due to its high mass transfer rate and mixing efficiency. In order to effectively promote and employ RPB in the chemical industry, it is necessary to have a better understanding of its flow characteristics. In this study, a noninvasive X-ray technique was employed for the first time to examine the hydrodynamics of RPB. Time-average tomographic cross sectional images showing the distribution of liquid in the packing zone under various operating conditions were captured. It was observed that high rotational speed improves the distribution of liquid in the packing. Additionally, quantitative analysis based on liquid holdup was made, and the effects of rotational speed, liquid flow rate, fluid viscosity, surfactant and two different kinds of packings on liquid holdup were evaluated. Results indicate that liquid holdup decreases with an increase in rotational speed and a reduction in both liquid flow rate and liquid viscosity. However, it was observed that surfactant has no significant effect on liquid holdup. Correlations to predict liquid holdup were developed, and the calculated values are in agreement with the experimental values with deviations within ±22%. Furthermore, the mean residence time in various conditions is calculated based on liquid holdup.

Sustainable sugarcane production and processing requires intensification of benefits and minimiza... more Sustainable sugarcane production and processing requires intensification of benefits and minimization of both short term and long term loses. Identification of long term loses/benefits from sugarcane production and processing is a difficult venture that entails critical scientific analysis based on collected scientific data, historical events and laboratory experiments. Moreover, most companies do not invest in research activities geared towards identifying critical long term loses or benefits. The long term effects of agronomic activities in sugarcane farming are herein discussed. Disposal of processed and unprocessed wastes from sugarcane production and processing activities are also discussed with various possible technical solutions and scientific techniques of effectively generating profits from such wastes summarized. It is hoped that the diverse green technologies of sugarcane production and processing explored herein can be of significant contribution to the management of th...

The Canadian Journal of Chemical Engineering, 2015

Rotating Packed Beds (RPBs) are novel reactors used for intensification of mass transfer and mixi... more Rotating Packed Beds (RPBs) are novel reactors used for intensification of mass transfer and mixing since they provide adjustable centrifugal force to simulate high gravity. In this work, in order to analyze and optimize fluid flow in RPBs, a three-dimensional single-phase flow was simulated and validated with previous experimental data. The results show that pressure drop increases with an increasing gas flow rate and rotation speed, and reveal the distribution of total pressure and velocity magnitude. A RPB with radial gas inlet, one of the generic types of RPBs, which is widely applied in the chemical industry but has poor gas distribution on the surface of packing, was optimized using various baffles. The width, distance, shape, and opening porosity of the baffles were examined by adopting a criterion, and their effect on gas distribution was illustrated. Finally, a possible optimum structure of the RPB was formulated under optimal operational conditions.

Langmuir : the ACS journal of surfaces and colloids, Jan 16, 2015

Polyaniline (PANI) nanofibers with improved properties were prepared by high gravity chemical oxi... more Polyaniline (PANI) nanofibers with improved properties were prepared by high gravity chemical oxidative polymerization in a rotating packed bed with the assistance of p-aminodiphenylamine (AD) and p-phenylenediamine (AP), respectively. The effects of reactor type, additive dosage, reaction temperature and high-gravity level on the properties of products were investigated in detail. Three conclusions were made: (1) little amount of additive can significantly improve some properties of the nanofibers such as uniformity, specific surface area and specific capacitance; (2) in order to obtain high quality nanofibers, the high-gravity level should coordinate with the reaction rate; (3) the molecular weight and conductivity of PANI decrease with the increase of additive dosage. The products have larger specific surface areas of up to 73.9 and 68.4 m2/g, and consequently improved specific capacitance of up to 527.5 and 552 F/g for the PANI nanofibers prepared with AD and AP, respectively. H...

Chemical Engineering and Processing - Process Intensification, 2022

Pharmaceutics

The drying process is a significant step in the manufacturing process of enteric hard capsules, w... more The drying process is a significant step in the manufacturing process of enteric hard capsules, which affects the physical and chemical properties of the capsules. Thus, the drying characteristics of plant-based enteric hard capsules were investigated at a constant air velocity of 2 m/s in a bench scale hot-air dryer under a temperature range of 25 to 45 °C and relative humidity of 40 to 80%. Results indicate that the drying process of the capsules mainly occur in a falling-rate period, implying that moisture transfer in the capsules is governed by internal moisture diffusion rate. High temperature and low relative humidity reduce drying time but increase the drying rate of the capsules. Investigation results of the mechanical properties and storage stability of the capsules, however, reveal that a fast drying rate leads to plant-based enteric hard capsules of low quality. Scanning electron microscopy further demonstrates that more layered cracks appear in capsules produced under a ...

Processes, 2021

Oxygen is a harmful substance in many processes because it can bring out corrosion and oxidation ... more Oxygen is a harmful substance in many processes because it can bring out corrosion and oxidation of food. This study aimed to enhance the removal of dissolved oxygen (DO) from water by employing a novel rotor–stator reactor (RSR). The effectiveness of the nitrogen stripping coupled with vacuum degassing technique for the removal of DO from water in the RSR was investigated. The deoxygenation efficiency (η) and the mass transfer coefficient (KLa) were determined under various operating conditions for the rotational speed, liquid volumetric flow rate, gas volumetric flow rate, and vacuum degree. The nitrogen stripping coupled with vacuum degassing technique achieved values for η and KLa of 97.34% and 0.0882 s−1, respectively, which are much higher than those achieved with the vacuum degassing technique alone (η = 89.95% and KLa = 0.0585 s−1). A correlation to predict the KLa was established and the predicted KLa values were in agreement with the experimental values, with deviations ge...

Summary: The size of the dispersed phase was a key variable of the liquid-liquid heterogeneous fl... more Summary: The size of the dispersed phase was a key variable of the liquid-liquid heterogeneous flow system. In this work, the Sauter mean diameter (SMD) of the dispersed phase in a novel helical tube reactor (HTR) was evaluated by using a castor oil-water system. Experimental results showed that the SMD decreased with the increased Reynolds number and volumetric flowrate ratio of water to oil. The SMD in the HTR with vertical charging was smaller ion between calculated and experimental data was within ±20% than that with parallel charging. A dimensionless correlation of SMD in the HTR was proposed and the deviation between calculated and experimental data was within ±20%.

Chemosphere

The ozonation process of Bisphenol A (BPA) in a rotating packed bed (RPB) was modeled by response... more The ozonation process of Bisphenol A (BPA) in a rotating packed bed (RPB) was modeled by response surface methodology (RSM) and artificial neural network (ANN). Experiments were performed according to the Box-Behnken design, and the interactive effects of various parameters including ozone concentration, pH, rotation speed of RPB and liquid flow rate on BPA degradation efficiency were investigated. Ozone concentration and pH had the most significant interactive effects on BPA degradation efficiency while rotation speed of RPB had no significant interactive effects with other variables. A second order polynomial equation was obtained to predict BPA degradation efficiency. Also, a multi-layered feed-forward ANN model was constructed based on the data of RSM experiments. Six neurons in hidden layer had the highest correlation coefficient (RANN = 0.99158). A comparison between RSM and ANN models suggested that both can accurately predict BPA degradation efficiency (RRSM = 0.99559). The highest BPA degradation efficiency (99.52 %) was achieved under the conditions of ozone concentration of 20 mg L-1, pH of 11, liquid flow rate of 10 L h-1 and rotation speed of RPB of 800 rpm, which was well predicted by the RSM model (99.54 %) and the ANN model (99.82 %). However, the RSM model was slightly better than the ANN model owing to its higher determination coefficient (R2RSM = 0.9912, R2ANN = 0.9827) and lower mean square error (MSERSM = 0.0001684, MSEANN = 0.0003305).

Chemical Engineering & Technology

Chemical Engineering Science

Chemical Engineering and Processing - Process Intensification

Abstract This work aimed to experimentally determine the effective gas-liquid specific interfacia... more Abstract This work aimed to experimentally determine the effective gas-liquid specific interfacial area (ae) in a countercurrent flow rotor-stator reactor (RSR) by chemical absorption of CO2 into NaOH solution. The effects of different operating parameters such as rotation speed, liquid volumetric flow rate and gas volumetric flow rate on ae were investigated. Results indicate that higher rotation speed, gas and liquid volumetric flow rates favor larger ae. A correlation to predict ae of gas-liquid phases in RSR is also established, and the predicted values are in agreement with the experimental data with deviations within 5 %.

Industrial & Engineering Chemistry Research

The work herein employed COMSOL Multiphysics simulation and experiment to study the temperature d... more The work herein employed COMSOL Multiphysics simulation and experiment to study the temperature distribution of water in a specially designed cylindrical microwave (MW) reactor with two magnetrons....

Separation Science and Technology

ABSTRACT This work studied the gas–liquid–liquid (G–L–L) reaction system of CO2 absorption into K... more ABSTRACT This work studied the gas–liquid–liquid (G–L–L) reaction system of CO2 absorption into K2CO3/KHCO3 buffer solution enhanced by organic phase in a rotor–stator reactor (RSR). The effects of volume fraction of organic phase, type of organic phase, rotational speed of RSR, gas and liquid volumetric flow rate, and temperature on CO2 absorption percentage were investigated. Results indicate that the addition of the organic phase with a volume fraction of 1.3–1.6% had significant promoting effect on CO2 absorption. CO2 absorption percentage increased with increase in the rotational speed of the RSR but decreased with rise in liquid temperature and gas–liquid ratio. This work demonstrates that RSR can significantly enhance liquid–liquid mixing and gas–liquid mass transfer processes in the G–L–L system.

2021 International Conference on Smart City and Green Energy (ICSCGE), 2021

This research article is a strategic and well holistic document to guide both national and county... more This research article is a strategic and well holistic document to guide both national and county governments to achieve 100% energy access and prioritize sustainable energy transition besides creating many green jobs and enterprises. It shall also form a very primary document and basis for every investor across the various opportunities and, in particular, energy generation and distribution. Energy is the prime engine of economic growth; its planning signals a direct positive impact on social welfare, economic activities, socio-political development, environmental sustainability. This article uses Low Emissions Analysis Platform (LEAP) software to provide the respective Medium-Term Plan (MTP) & Long-Term Plan (LTP) Update for the period 2019 (base year) to 2030. This MTP is the identification and analysis of suitable expansion paths of the country’s power system for that period, complying with the defined planning criteria and framework. This encompasses (i) examining of yesteryear electricity demand and advancement of future insistence scenarios; (ii) analysis of favorable expansion candidate fuels and technologies plus their scheduling; (iii) modeling of their anticipated addition to the prospective power generation and the expedient operation of the generation system for the year 2030. The key recommendation is that the Government of Kenya ought to determine means to sustainably expedite broad-based development in the MTP - implying stable and sufficient energy (including but not limited to grid electricity) supply to cater to growing demand.

Journal of Energy

Gadam sorghum stalks are agricultural residues which can be hydrolyzed into fermentable sugars th... more Gadam sorghum stalks are agricultural residues which can be hydrolyzed into fermentable sugars that can be used to produce bioethanol which is a renewable source of energy. In order to produce bioethanol from lignocellulosic biomass such as Gadam sorghum stalks, several processes including hydrolysis are involved. However, the use of lignocellulosic biomass for bioethanol production is hindered by the low yield of fermentable sugars obtained during hydrolysis. The lack of sufficient information on optimal conditions governing hydrolysis of lignocellulosic biomass leads to inefficient process which hinders the economic viability of large-scale bioethanol production. The objective of this study was to optimize reaction conditions involved in concentrated sulphuric acid hydrolysis of Gadam sorghum stalks. During hydrolysis, the conditions that were varied included temperature (40°C–80°C), time (30-90 minutes), and concentration of acid (30%-70%, w / w ). Central composite rotatable des...

Journal of Water Process Engineering

Powder Technology, 2015

The preparation of basic magnesium carbonate (BMC) by the simultaneous absorption of NH 3 and CO ... more The preparation of basic magnesium carbonate (BMC) by the simultaneous absorption of NH 3 and CO 2 into MgCl 2 solution in a rotating packed bed (RPB) was studied. The influences of the operating conditions including the rotation speed, liquid volumetric flow rate, gas volumetric flow rate, reaction temperature and initial concentration of MgCl 2 solution on the crystal structure and morphology of BMC were investigated. The scanning electron microscope image of the as-prepared BMC showed that the BMC particles had a unique rose-like structure with a mean size of 5.3 μm, a petal thickness of 20 nm and a particle size distribution mainly in the range of 2.8-7 μm.

Chemical Engineering Science, 2015

Liquid flow of water and microemulsion in a rotor-stator reactor (RSR) was studied. A high-speed ... more Liquid flow of water and microemulsion in a rotor-stator reactor (RSR) was studied. A high-speed camera was used to obtain continuous and clear images of liquid flow. Diameter of droplets reduced with increasing layers of rotor-ring/stator-ring. Velocity of droplets rose with increasing layers of rotor-ring/stator-ring. Correlations were established to predict the diameter and velocity of droplets.

Chemical Engineering Science, 2015

A rotating packed bed (RPB) has received considerable attention of many researchers due to its hi... more A rotating packed bed (RPB) has received considerable attention of many researchers due to its high mass transfer rate and mixing efficiency. In order to effectively promote and employ RPB in the chemical industry, it is necessary to have a better understanding of its flow characteristics. In this study, a noninvasive X-ray technique was employed for the first time to examine the hydrodynamics of RPB. Time-average tomographic cross sectional images showing the distribution of liquid in the packing zone under various operating conditions were captured. It was observed that high rotational speed improves the distribution of liquid in the packing. Additionally, quantitative analysis based on liquid holdup was made, and the effects of rotational speed, liquid flow rate, fluid viscosity, surfactant and two different kinds of packings on liquid holdup were evaluated. Results indicate that liquid holdup decreases with an increase in rotational speed and a reduction in both liquid flow rate and liquid viscosity. However, it was observed that surfactant has no significant effect on liquid holdup. Correlations to predict liquid holdup were developed, and the calculated values are in agreement with the experimental values with deviations within ±22%. Furthermore, the mean residence time in various conditions is calculated based on liquid holdup.

Sustainable sugarcane production and processing requires intensification of benefits and minimiza... more Sustainable sugarcane production and processing requires intensification of benefits and minimization of both short term and long term loses. Identification of long term loses/benefits from sugarcane production and processing is a difficult venture that entails critical scientific analysis based on collected scientific data, historical events and laboratory experiments. Moreover, most companies do not invest in research activities geared towards identifying critical long term loses or benefits. The long term effects of agronomic activities in sugarcane farming are herein discussed. Disposal of processed and unprocessed wastes from sugarcane production and processing activities are also discussed with various possible technical solutions and scientific techniques of effectively generating profits from such wastes summarized. It is hoped that the diverse green technologies of sugarcane production and processing explored herein can be of significant contribution to the management of th...

The Canadian Journal of Chemical Engineering, 2015

Rotating Packed Beds (RPBs) are novel reactors used for intensification of mass transfer and mixi... more Rotating Packed Beds (RPBs) are novel reactors used for intensification of mass transfer and mixing since they provide adjustable centrifugal force to simulate high gravity. In this work, in order to analyze and optimize fluid flow in RPBs, a three-dimensional single-phase flow was simulated and validated with previous experimental data. The results show that pressure drop increases with an increasing gas flow rate and rotation speed, and reveal the distribution of total pressure and velocity magnitude. A RPB with radial gas inlet, one of the generic types of RPBs, which is widely applied in the chemical industry but has poor gas distribution on the surface of packing, was optimized using various baffles. The width, distance, shape, and opening porosity of the baffles were examined by adopting a criterion, and their effect on gas distribution was illustrated. Finally, a possible optimum structure of the RPB was formulated under optimal operational conditions.

Langmuir : the ACS journal of surfaces and colloids, Jan 16, 2015

Polyaniline (PANI) nanofibers with improved properties were prepared by high gravity chemical oxi... more Polyaniline (PANI) nanofibers with improved properties were prepared by high gravity chemical oxidative polymerization in a rotating packed bed with the assistance of p-aminodiphenylamine (AD) and p-phenylenediamine (AP), respectively. The effects of reactor type, additive dosage, reaction temperature and high-gravity level on the properties of products were investigated in detail. Three conclusions were made: (1) little amount of additive can significantly improve some properties of the nanofibers such as uniformity, specific surface area and specific capacitance; (2) in order to obtain high quality nanofibers, the high-gravity level should coordinate with the reaction rate; (3) the molecular weight and conductivity of PANI decrease with the increase of additive dosage. The products have larger specific surface areas of up to 73.9 and 68.4 m2/g, and consequently improved specific capacitance of up to 527.5 and 552 F/g for the PANI nanofibers prepared with AD and AP, respectively. H...

Chemical Engineering and Processing - Process Intensification, 2022

Pharmaceutics

The drying process is a significant step in the manufacturing process of enteric hard capsules, w... more The drying process is a significant step in the manufacturing process of enteric hard capsules, which affects the physical and chemical properties of the capsules. Thus, the drying characteristics of plant-based enteric hard capsules were investigated at a constant air velocity of 2 m/s in a bench scale hot-air dryer under a temperature range of 25 to 45 °C and relative humidity of 40 to 80%. Results indicate that the drying process of the capsules mainly occur in a falling-rate period, implying that moisture transfer in the capsules is governed by internal moisture diffusion rate. High temperature and low relative humidity reduce drying time but increase the drying rate of the capsules. Investigation results of the mechanical properties and storage stability of the capsules, however, reveal that a fast drying rate leads to plant-based enteric hard capsules of low quality. Scanning electron microscopy further demonstrates that more layered cracks appear in capsules produced under a ...

Processes, 2021

Oxygen is a harmful substance in many processes because it can bring out corrosion and oxidation ... more Oxygen is a harmful substance in many processes because it can bring out corrosion and oxidation of food. This study aimed to enhance the removal of dissolved oxygen (DO) from water by employing a novel rotor–stator reactor (RSR). The effectiveness of the nitrogen stripping coupled with vacuum degassing technique for the removal of DO from water in the RSR was investigated. The deoxygenation efficiency (η) and the mass transfer coefficient (KLa) were determined under various operating conditions for the rotational speed, liquid volumetric flow rate, gas volumetric flow rate, and vacuum degree. The nitrogen stripping coupled with vacuum degassing technique achieved values for η and KLa of 97.34% and 0.0882 s−1, respectively, which are much higher than those achieved with the vacuum degassing technique alone (η = 89.95% and KLa = 0.0585 s−1). A correlation to predict the KLa was established and the predicted KLa values were in agreement with the experimental values, with deviations ge...

Summary: The size of the dispersed phase was a key variable of the liquid-liquid heterogeneous fl... more Summary: The size of the dispersed phase was a key variable of the liquid-liquid heterogeneous flow system. In this work, the Sauter mean diameter (SMD) of the dispersed phase in a novel helical tube reactor (HTR) was evaluated by using a castor oil-water system. Experimental results showed that the SMD decreased with the increased Reynolds number and volumetric flowrate ratio of water to oil. The SMD in the HTR with vertical charging was smaller ion between calculated and experimental data was within ±20% than that with parallel charging. A dimensionless correlation of SMD in the HTR was proposed and the deviation between calculated and experimental data was within ±20%.

Chemosphere

The ozonation process of Bisphenol A (BPA) in a rotating packed bed (RPB) was modeled by response... more The ozonation process of Bisphenol A (BPA) in a rotating packed bed (RPB) was modeled by response surface methodology (RSM) and artificial neural network (ANN). Experiments were performed according to the Box-Behnken design, and the interactive effects of various parameters including ozone concentration, pH, rotation speed of RPB and liquid flow rate on BPA degradation efficiency were investigated. Ozone concentration and pH had the most significant interactive effects on BPA degradation efficiency while rotation speed of RPB had no significant interactive effects with other variables. A second order polynomial equation was obtained to predict BPA degradation efficiency. Also, a multi-layered feed-forward ANN model was constructed based on the data of RSM experiments. Six neurons in hidden layer had the highest correlation coefficient (RANN = 0.99158). A comparison between RSM and ANN models suggested that both can accurately predict BPA degradation efficiency (RRSM = 0.99559). The highest BPA degradation efficiency (99.52 %) was achieved under the conditions of ozone concentration of 20 mg L-1, pH of 11, liquid flow rate of 10 L h-1 and rotation speed of RPB of 800 rpm, which was well predicted by the RSM model (99.54 %) and the ANN model (99.82 %). However, the RSM model was slightly better than the ANN model owing to its higher determination coefficient (R2RSM = 0.9912, R2ANN = 0.9827) and lower mean square error (MSERSM = 0.0001684, MSEANN = 0.0003305).

Chemical Engineering & Technology

Chemical Engineering Science

Chemical Engineering and Processing - Process Intensification

Abstract This work aimed to experimentally determine the effective gas-liquid specific interfacia... more Abstract This work aimed to experimentally determine the effective gas-liquid specific interfacial area (ae) in a countercurrent flow rotor-stator reactor (RSR) by chemical absorption of CO2 into NaOH solution. The effects of different operating parameters such as rotation speed, liquid volumetric flow rate and gas volumetric flow rate on ae were investigated. Results indicate that higher rotation speed, gas and liquid volumetric flow rates favor larger ae. A correlation to predict ae of gas-liquid phases in RSR is also established, and the predicted values are in agreement with the experimental data with deviations within 5 %.

Industrial & Engineering Chemistry Research

The work herein employed COMSOL Multiphysics simulation and experiment to study the temperature d... more The work herein employed COMSOL Multiphysics simulation and experiment to study the temperature distribution of water in a specially designed cylindrical microwave (MW) reactor with two magnetrons....

Separation Science and Technology

ABSTRACT This work studied the gas–liquid–liquid (G–L–L) reaction system of CO2 absorption into K... more ABSTRACT This work studied the gas–liquid–liquid (G–L–L) reaction system of CO2 absorption into K2CO3/KHCO3 buffer solution enhanced by organic phase in a rotor–stator reactor (RSR). The effects of volume fraction of organic phase, type of organic phase, rotational speed of RSR, gas and liquid volumetric flow rate, and temperature on CO2 absorption percentage were investigated. Results indicate that the addition of the organic phase with a volume fraction of 1.3–1.6% had significant promoting effect on CO2 absorption. CO2 absorption percentage increased with increase in the rotational speed of the RSR but decreased with rise in liquid temperature and gas–liquid ratio. This work demonstrates that RSR can significantly enhance liquid–liquid mixing and gas–liquid mass transfer processes in the G–L–L system.