Arkan Hadi | Universiti Malaysia Pahang (UMP) (original) (raw)

Papers by Arkan Hadi

CHEMCAD and HYSYS process simulators were used to analysis the literature experimental data and p... more CHEMCAD and HYSYS process simulators were used to analysis the literature experimental data and predict the solubility of CO 2 in three physical solvents (sulfolane, propylene carbonate (PC), and n-methyl-2-pyrrolidone (NMP)) at different temperatures (298.15 , 313.15 , 323.15, and 373.15 K). Two thermodynamic models were used, the first using Peng-Robinson equation of state (PR-EOS) and the second using Soave-Redlich-Kwong equation of state (SRK-EOS). The solubility data of CO 2 in all three physical solvents systems were correlated with CHEMCAD simulator using the SRK model without modification (k ij = 0).The results showed a small deviation (less than 5%), but higher deviation (about 10%) was noticed only for CO 2 -NMP system at temperature 373 K. Whereas the results of PR model showed a high deviation (about 20%) with all the three physical solvents systems. Modifications performed by editing user defined binary interaction parameters (BIP) of the systems used, give good results for both simulators. A, B: modified adjusting parameters in equations of state of mixture. a i , b i : parameters in equations of state of pure component. a m , b m : parameters in equations of state of mixture .

In the present study a thermodynamic model for prediction of gas-liquid equilibrium at high press... more In the present study a thermodynamic model for prediction of gas-liquid equilibrium at high pressures and different temperatures prepared for the binary systems of carbon dioxide with each of the one of the liquid physical solvents (2) (sulfolane, n-methyl-2-pyrrolidone and propylene carbonate) using Peng-Robenson equation of state (PR-EOS) with different mixing rules to show the effect of the type of mixing rule used. Comparison of the experimental phase equilibrium data in the literature with the results of the model showed very good representation for some mixing rules and good for the others.

Journal of Polymer Engineering

Restoration of waste polymer based on lowdensity polyethylene (LDPE), high-density polyethylene (... more Restoration of waste polymer based on lowdensity polyethylene (LDPE), high-density polyethylene (HDPE) and polypropylene (PP) is studied using the dissolution/reprecipitation method. In this technique, pure turpentine, turpentine/petroleum ether (PetE) and turpentine/benzene as solvents with different fractions and PetE and n-hexane as non-solvents were examined. Commercial polymer products (packaging food, bags, laboratory plastic materials, detergent containers) used as raw materials were optimized with model polymers. Polymer recoveries in every case were < 94%. Fourier transform infrared (FTIR) spectra and tensile mechanical properties of the samples before and after recycling were measured. Potential recycling-based degradation of the polymer was further investigated by measuring the thermal properties (melting point and crystallinity), before and after recycling, using differential scanning calorimetry (DSC). The blend solvents were seen as good solvents for all polyolefins used and the dissolution temperature was less than the pure solvent at the same time. High reconditioning was observed in most recycled samples, with no significant difference from the virgin materials. The studied technique seems to be viable for waste polyolefin polymer recycling.

In this work, a thermodynamic model for the prediction of gas-liquid equilibrium at moderate pres... more In this work, a thermodynamic model for the prediction of gas-liquid equilibrium at moderate pressures (up to 6 bar) and different temperatures (288-323 K) for the ternary system of carbon dioxide (1)-(2) mixture (ethanol-water) is established using Soave/Redlich/Kwong equation of state (SRK-EOS). Two different mixing rules were used to show the effect of the type of mixing rule. A comparison of experimental phase equilibrium data in the literature with the predicted results showed very good representation for one mixing rule and good for the other.

Energy, Education, Science and Technology

Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (H... more Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (HDPE) or polypropylene (PP) is studied using the dissolution/reprecipitation method. In this technique, Mesitylene and petroleum ether (PetE) were used as solvents with different fractions. PetE and n-hexane were used as non- solvents. Commercial polyolefins products as a raw material were used and optimized with model polymers. Polymer recoveries in every case were greater than 95%. FT-IR spectra and mechanical properties of the samples before and after recycling were measured. Thermal properties (melting point, crystallinity) of the polymer were further investigated, before and after recycling, using DSC. High reconditioning was observed in most recycled samples with not significantly different from the virgin materials.

Reconditioning of low density polyethylene (LDPE) was examined using dissolution/reprecipitation ... more Reconditioning of low density polyethylene (LDPE) was examined using dissolution/reprecipitation process. Virgin LDPE material, either in the form of pellets for three different waste material (carrier bags original used (bags), laboratory pipits (pipits) and intravenous fluids containers (Int.)), are presented in this paper. Petroleum ether in (90-120) o C boiling point was used as solvent for plastic dissolution and petroleum ether in boiling point (40-60), (60-80) o C were used as non-solvents for reprecipitation, washing of the material obtained and drying. The solvent mixtures involved are separated by distillation for further reuse. The recycled material was evaluated in terms of the following properties: melt flow index (MFI), intrinsic viscosity, crystallinity and mechanical performance in tensile mode.

Polyolefin belong to a class of thermoplastics used globally in a wide variety of applications. T... more Polyolefin belong to a class of thermoplastics used globally in a wide variety of applications. The current technology of plastic waste disposal is becoming inadequate due to new regulation rules, increasing expenses and because most common polymers are not appreciably biodegradable. To achieve desirable properties in reconditioned polyolefin for any dissolution technique, the selectivity, durability and sustainability of solvents is crucial. Therefore, this study aimed to develop durable and sustainable solvents for the reconditioning of used polyethylene (PE) and polypropylene (PP) using the dissolution/reprecipitation technique. Waste polyolefins based on LDPE, HDPE and PP was reconditioned using a set of pure and blend non-polar organic solvents, at various ratios of polyolefin and solvents. The reconditioned polymer was compared with virgin polyolefin polymers. Commercial waste products (bags, detergent containers, laboratory pipettes, chemical liquid containers, some pharmaceu...

Chemical Industry and Chemical Engineering Quarterly, 2013

Physical Chemistry, 2012

Journal of Polymer Engineering, 2000

The dehydration of ethyl alcohol in atmospheric isothermal vapor phase to produce both ethylene a... more The dehydration of ethyl alcohol in atmospheric isothermal vapor phase to produce both ethylene and ether was studied in fixed bed reactor (2.54 cm inside diameter and 110 cm height). Two temperature ranges were used according to catalyst type, these are 250-350 0C for both alumina and zeolites (4A and 5A) and 90-120 0C for resin, besides weight ratio of catalyst to molar flow rate (W/FA) from 38 to 116.6 (gcat.hr/gmol) was selected to test the conversion, yield, selectivity and rate of reaction of products for each catalyst . Comparative study between catalysts was made and it was clearly found that alumina gives higher conversion than other catalysts (98% at 350 0C and W/F=116.6 gcat.hr/gmole), also the study shows longer deactivation time of resin in comparison to deactivation time of alumina and zeolites. Also it was clearly shown that ether can benefit from the large cage of catalyst for formation. The present work is concerned with catalytic dehydration of ethanol in vapor phase to produce diethyl ether and/or ethylene in packed bed reactor which is mainly directed to study the most effective parameters such as temperature of reaction, liquid hourly space time (residence time) and reaction time. Four different catalysts such as alumina, 4A zeolite, 5A zeolite and cation resin are used.

Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (H... more Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (HDPE) or
polypropylene (PP) is studied by dissolution/reprecipitation method. In this technique, Toluene and petroleum ether (PetE)
as solvents with different fractions and PetE , n-hexane as non-solvents were examined at different weight percent
amounts and different temperatures, using as raw material for commercial polymer products (packaging food , bags,
laboratory plastic materials , detergent containers ). The recovery of polymer in every case was greater than 98%. FT-IR
spectra and tensile mechanical properties of the samples before and after recycling were measured. Potential recyclingbased degradation of the polymer was further investigated by measuring the thermal properties (melting point,
crystallinity), of the polymer before and after recycling, using DSC.

Waste polymer reconditioning was examined by a method of dissolution/reprecipitation on low- and ... more Waste polymer reconditioning was examined
by a method of dissolution/reprecipitation on low- and
high-density polyethylene (PE) and polypropylene (PP).
Toluene and petroleum ether, in different proportions,
were used as solvents, and n-hexane was used as a nonsolvent. Commercial polymer products used on an everyday basis were used with a virgin polymer, to optimize the
qualities of the final product, and 98 % polymer was recovered in each case. Fourier transform infrared spectroscopy
(FTIR) images and tensile mechanical properties of the
samples, before and after recycling, were analyzed. The
potential recycling-based degradation of the polymer was
further investigated by measuring the thermal properties
(melting point and crystallinity) before and after recycling, using differential scanning calorimetry (DSC). High
reconditioning was observed in most recycled samples,
with no significant difference from the virgin materials.
The studied technique seems to be viable for waste polyolefin polymer recycling.

Journal of Polymer Engineering

Energy, Education, Science and Technology

Chemical Industry and Chemical Engineering Quarterly, 2013

Physical Chemistry, 2012

Journal of Polymer Engineering, 2000

Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (H... more Recycling of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (HDPE) or
polypropylene (PP) is studied by dissolution/reprecipitation method. In this technique, Toluene and petroleum ether (PetE)
as solvents with different fractions and PetE , n-hexane as non-solvents were examined at different weight percent
amounts and different temperatures, using as raw material for commercial polymer products (packaging food , bags,
laboratory plastic materials , detergent containers ). The recovery of polymer in every case was greater than 98%. FT-IR
spectra and tensile mechanical properties of the samples before and after recycling were measured. Potential recyclingbased degradation of the polymer was further investigated by measuring the thermal properties (melting point,
crystallinity), of the polymer before and after recycling, using DSC.