Department of Process Engineering (1990 - Present)
Chemical Engineering
Chemical Engineering, McGill, Montreal, Canada
Chemical Engineering
Chemical Engineering, McGill, Montreal, Canada
Chemical Engineering
Chemical Engineering, Shiraz University, Shiraz, Iran
Research field: hermodynamics & Kinetics
Expert: Dr. Ali Haghtalab
Phone: 82883331
Address:
Professor Ali Haghtalab was born on 15 May 1956. His birth took place in Kashan, Iran. He grows up in Kashan until finishing high school. At 18, he was admitted to undergraduate study at Shiraz University (former Pahlavi) in Shiraz, Iran. Following his education in Undergraduate, he moved to Montreal, Canada, to continue his study in Master Engineering Science at McGill University. In 1985, he was admitted to a Ph.D. program at McGill, graduating with a Ph.D. in 1990. Dr. Ali Haghtalab started his career as an assistant professor at Tarbiat Modares University (TMU) in Tehran, Iran, in 1990. Following his promotion to Associate Professor, he moved to the University of Toronto to take a one-year sabbatical position in the Department of Chemical Engineering and Applied Chemistry. He was invited as a faculty member at Qatar University from 1983-1986. Presently, he is working as a full professor in the Department of Chemical Engineering at TMU. Profile summary: Full name: Ali Haghtalab Date of birth: 15 May 1956 Place of birth: Kashan, Iran Married Status: Married with three children Nationality: Iranian: White, Height: 1.88 meters Profession: Professor of Chemical Engineering Place of Work: Department of Chemical Engineering, Tarbiat Modares University.
Carbon dioxide is among the most crucial impurity in natural gas and must be removed from the gas before any use to avoid environmental damage and problem. The CO2 absorption with the alkanolamine process is widely used for this purpose. This study has been dedicated to modeling the aqueous CO2+ N-methyldiethanolamine (MDEA) system's vapor-liquid equilibrium within the temperature range 297.7-413.15 K and gas loading in the range of 0.000249-1.507 CO2 mole/MDEA mole. In combination with the Wong-Sandler mixing rule and the NRTL activity coefficient model, the Peng-Robinson equation of state has been applied as an EOS/GE approach for modeling of vapor-liquid equilibrium of the CO2-MDEA-H2O system. For improving the performance of the model,
The Boyle temperature is the temperature at which the second virial coefficient becomes zero. In this work, capability of different alpha functions, α(Tr), in prediction of supercritical properties of different polar and nonpolar fluids at Boyle temperature is investigated. In this direction, eight different alpha functions, α(Tr), including Peng – Robinson original form (1976), Coquelet et al. (2004), Haghtalab et al. (2011), Saffari – Zahedi (2013), Soave – Redlich – Kwong original form (1972), Ozokwelu – Erbar (1987), Soave (1993) and Nasrifar – Bolland (2004) are coupled with different cubic equations of states including Peng – Robinson (PR), Soave – Redlich – Kwong (SRK), volume – translated Peng – Robinson (VTP
The solubility of drugs and raw materials in solvents and their mixtures has presented an important role in the pharmaceutical industry. To enhance the solubility of poorly soluble drugs in water, we can use Deep Eutectic Solvents (DESs), which consist of a Hydrogen Bond Acceptor (HBA) and Hydrogen Bond Donor (HBD). In this work, for the formation of the present DES, choline chloride (ChCl) and glycolic acid (GA) with a molar ratio of 1:2 were used. Then, we measured the solubility of cefixime trihydrate in pure water, pure DES and their mixtures at the different weight percent of DES in the temperature range of 298.15 to 323.15?K at atmospheric pressure. The results of experimental solubility data showed that the solubility of cefixime tri
In this work, we presented the set of the experimental VLE data of solubility of carbon dioxide in the blend of 2-((2-Aminoethyl) amino) ethanol (AEEA) and sulfolane utilizing a quasi-static high-pressure equilibrium cell. We performed the measurements under isothermal conditions at temperatures of 313.15, 328.15 and, 343.15 K, and up to the maximum pressure of 5500 kPa. We used the various solvent mass compositions of (30–20–50), (30–10–60), (20–20–60), (20–10–70), (10–20–70, 10–10–80) wt% for the AEEA + sulfolane + H2O system. It was found that the CO2 loading in the solvent significantly enhanced by decreasing temperature and increasing pressure. Besides, CO2 solubility was improved by increasing both of sulfo
We investigated the rheological behavior of linear low-density polyethylene (LLDPE)/polylactic acid (PLA) blends in the presence of modified and non-modified silica nanoparticles in extensional flow. Characterization methods were used as Fourier transform infrared spectroscopy, scanning electron microscopy, and rheometric measurements under shear and uniaxial extensional flows. The rheology behavior of LLDPE significantly was changed by the addition of PLA and silica nanoparticles. Extensional results showed that the elongational viscosity of the blends intensified by the incorporation of silica nanoparticles. Strain hardening was observed for LLDPE containing 2?wt.% of the unmodified silica nanoparticles, which disappeared by enhancement
In this work, to obtain optimal process conditions in a CO2 capturing plant, novel equipment modifications are made to achieve the desired product specification in the small and large pilot plants with low and high pressures. For this purpose, results from two different CO2 capturing pilot plants are compared at different process variables, using the different concentration of aqueous MEA (25, 28, 30, 33) wt.% and within the temperature range of 50 ∼ 77?C in the absorber and 100 ∼120?C in desorber. We used the generalized Patel-Teja-Valderrama (PTV) EoS, Peng-Robinson (PR) EoS, and Soave-Redlich-Kwong (SRK) equation of state through a MATLAB code and Aspen Plus default with the NRTL model. Moreover, critical properties for MEA solutions
The effects of "Dry Gel" on the carbon dioxide hydrate formation and storage capacity were studied. Gel-supported dry water (Dry Gel) was prepared by mixing gelling agents, hydrophobic silica nanoparticles, water, and air in a high-speed blender. The kinetic parameters of carbon dioxide hydrate formation such as mole of consumed gas, induction time, gas uptake rate, storage capacity, final conversion of water to hydrate, and apparent rate constant were investigated in the presence of dry gel with different gel strength (0 to 15 wt.%) at two silica ratios (5 and 10 wt.%). The experiments of hydrate formation were performed using a 200 cc stainless-steel vessel with and without stirring under the initial condition of 21 bars and 15 ?C. Me
The non-electrolyte NRTL-NRF model has been modified to study electrolyte solutions. The modified model for electrolytes is composed of short range part expressed by the modified nonelectrolyte NRTL-NRF and the Pitzer-Debye-H?ckel equation to represent the long range interactions of ions in the solution. In this work, a salt specific parameter is used. Various types of experimental data including binary and ternary activity and osmotic coefficients, solid and gas solubilities in aqueous NaCl and also aqueous Methyldiethanolamine ( MDEA) data at wide temperature and pressure ranges have been implemented to check the performance of the present model. The overall relative standard deviation of 0.046 has been achieved for 130 strong aqueous bi
The sets of vapor–liquid equilibrium (VLE) data for CO2 solubility in a combination of (N-methyldiethanolamine (MDEA) + 2-(2-aminoethylamino) ethanol (AEEA)) and (diethanolamine (DEA) + AEEA) as a chemical solvent blended with sulfolane as a physical solvent are acquired at 313.15–343.15 K within the CO2 partial pressure range up to 5600 kPa. The measurements are fulfilled for two different hybrid solvents of MDEA + AEEA + sulfolane with the weight compositions of (20–10–10) wt % and (20–10–20) wt % and a mixed solvent of DEA + AEEA + sulfolane with (20–10–10) wt %. It is deduced that CO2 loading was enhanced by substituting the MDEA with DEA, diminishing the temperature, and raising the pressure. Besides, increasing the sul
During water flooding of the oil reservoir, deposition of calcium sulfate on the pore surface causes formation damage and affects oil recovery efficiency. Thus, a clear understanding of this scale’s early crystallization stage is crucial to optimize and control the precipitation process. For the first time in this study, molecular dynamics simulation has been utilized to study the formation pathway of calcium sulfate in homogeneous and heterogeneous systems to address precipitation and deposition processes and the temperature influence on this phenomenon. We found four distinct steps in crystal evolution regardless of the temperature effect in both precipitation and deposition systems that confirmed the prenucleation theory. The results i
Alkanolamines are used to remove acidic gases such as CO2 and H2S from natural gas. In this study, thermodynamic modeling of the binary component CO2+MDEA, three component MDEA+H2O+CO2 and the quaternary MDEA+AEEA+H2O+CO2 systems were developed using an additional Gibbs argillic model for the first time in the modeling of CO2 solubility in different solutions. The appropriate model was considered using the assumption of an entirely molecular system without any occurrence of chemical reactions and saturated gas phase from the CO2 gas. The nonelectrolyte Wilson nonrandom factor (N-Wilson-NRF) model and the activity coefficient method (γ_φ Aproach) were used to calculate solubility of CO2. The two-component water- CO2 model was modeled and t
We used a chemical reduction method to synthesize the catalysts of cobalt (Co) and cobalt-ruthenium (Co-Ru) bifunctional supported on carbon nanotubes (CNTs) for Fischer–Tropsch synthesis (FTS) in a fixed-bed reactor. These Co-Ru/CNTs catalysts were synthesized with various weight proportions of Ru/Co (0.1 to 0.4 wt%) with keeping a fixed amount of cobalt (10 wt%). Moreover, for comparison purpose, CNTs supported Co- and Co (Ru)-based catalysts at same loading as the above catalysts were prepared through impregnation method. We characterize the present catalysts through the various techniques such as Energy–dispersive X-ray (EDX), Transmission Electron Microscopy (TEM), Brunauer–Emmett–Teller (BET), Hydrogen-Temperature-Programmed R
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