Shahrokh Shahhosseini

Iran University of Science and Technology

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Ahad Ghaemi

Iran University of Science and Technology

Heidar Javdani Esfahani

Iran University of Science and Technology

Yadollah Tavan

Sharif University of Technology

Mehdi Asadollahzadeh

Nuclear Science and Technology Research Institute

Mohammad Amin Sobati

Iran University of Science and Technology

Meisam Torab‐Mostaedi

Atomic Energy Organization of Iran

Seyyed Hossein Hosseini

Islamic Azad University of Najafabad

Somayeh Norouzbahari

Kharazmi University

Mohsen Amiri

Islamic Azad University of Najafabad

Fariba Mohammadi-Nejati

Iran University of Science and Technology

Cooperative Institutions

Iran University of Science and Technology

University of Tehran

Sharif University of Technology

K.N.Toosi University of Technology

Nuclear Science and Technology Research Institute

Atomic Energy Organization of Iran

Shahid Beheshti University

And Technology Research (United Kingdom)

Petroleum University of Technology

Islamic Azad University, Science and Research Branch

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Covalent immobilization of POM-based ILs on magnetic graphene oxide for efficient catalytic oxidative desulfurization of model fuel under solvent-free and moderate reaction conditions

Fuel Processing Technology (2023)

Fariba Mohammadi-Nejati Shahrokh Shahhosseini

Dibenzothiophene

10.1016/j.fuproc.2023.107980

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Citations (9)

High CO₂ Adsorption on Amine-Functionalized Improved Mesoporous Silica Nanotube as an Eco-Friendly Nanocomposite

Energy & Fuels (2019)

Fatemeh S. Taheri Ahad Ghaemi Ali Maleki Shahrokh Shahhosseini

New improved mesoporous nanocomposite CO2 adsorbents IMSiNTs-PEI (IMP) were synthesized by improved pretreatment of natural halloysite nanotubes (HNTs) and impregnation of improved mesoporous silica nanotubes (IMSiNTs) with polyethylenimine (PEI). The new improved mesoporous morphology remained the same as the HNTs morphology, but the specific surface area (340.61 m2/g) and pore volume (0.499 m3/g) after treatment, respectively, were about 7 times and 2.5 times more than those values for HNTs. The results indicate that more active groups were created on the IMSiNTs surface compared with HNTs. Also, an adsorption apparatus was used for analyzing the impact of various ranges of pressure, temperature, and loaded PEI amount on adsorption capacity. The results showed an increase in uptake capacity with increasing pressure and also a decrease in uptake capacity with increasing temperature exhibiting that the nature of the processes is exothermic. On the other hand, the proper PEI dispersion inside the IMSiNTs could improve the adsorption capacity and the highest adsorption capacity of 7.84 mmol/g was obtained at 20 °C and 9 bar for IMP-30 PEI. It was also demonstrated that these adsorbents have high thermal stability, good reversibility, and stability during adsorption/desorption cycles.

Polyethylenimine

Halloysite

Thermal Stability

Specific surface area

10.1021/acs.energyfuels.9b00703

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Citations (93)

Extractive oxidative desulfurization process in a novel magnetically oscillatory fluidized bed reactor over Mn-Promoted MoO3-Fe3O4 magnetic nanocomposites

Separation and Purification Technology (2024)

Zahra Kaeed Shahrokh Shahhosseini Mehran Rezaei

Fluidized bed combustion

10.1016/j.seppur.2024.131372

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Efficient CO2 adsorption by deoiled flaxseed hydrochar

Scientific Reports (2024)

Maede Arefizadeh Danial Behvandi Shahrokh Shahhosseini Ahad Ghaemi

This study optimizes CO2 adsorption using hydrochar from de-oiled flaxseed (FDOP), a waste byproduct of the oil extraction industry, through hydrothermal carbonization (HTC). The aim is to enhance CO2 capture sustainably and cost-effectively. Using Response Surface Methodology (RSM), in optimal conditions achieved 1153.26 mg/g CO2 adsorption capacity under 215.15 °C synthesis temperature, 3.05 h synthesis time, 0.99 M acid concentration, 8.997 bar pressure, and 25.07 °C adsorption temperature. Statistical analysis (F-value: 44.48, R²: 0.9705) confirmed strong model reliability. Kinetic analysis showed both physical and chemical adsorption, while thermodynamic analysis revealed exothermic behavior (ΔH° values: -46.697 kJ/mol for M-225, -40.230 kJ/mol for MA-203). After 10 regeneration cycles, the adsorption capacity was reduced by only 2.8% and 3.1%, indicating excellent recyclability. This study highlights FDOP-derived hydrochar as a highly efficient, low-cost adsorbent, offering industrial applications for carbon capture and waste management.

10.1038/s41598-024-78177-w

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Extractive-catalytic oxidative desulfurization of a model fuel over vanadium-containing heteropolyacids immobilized on amine-functionalized magnetic graphene oxide: a comparative study between Keggin and Dawson-type heteropolyacids and process optimization via response surface methodology

Sustainable Energy & Fuels (2022)

Fariba Mohammadi-Nejati Shahrokh Shahhosseini

V-containing HPAs were supported on magnetic graphene oxide and used in an ECODS system. A comparative study between Well–Dawson and Keggin type HPAs in DBT removal was performed. The catalyst was separated easily from the reaction media.

Vanadium Oxide

10.1039/d2se01360f

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Citations (5)

Nonequilibrium dynamic modeling of carbon dioxide absorption by partially carbonated ammonia solutions

Chemical Engineering Journal (2008)

Ahad Ghaemi Shahrokh Shahhosseini M Ghanadi Maragheh

Absorption efficiency

10.1016/j.cej.2008.10.020

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Citations (39)

Unified new correlation for prediction of dispersed phase holdup in agitated extraction columns

Separation and Purification Technology (2015)

Mehdi Asadollahzadeh Meisam Torab‐Mostaedi Shahrokh Shahhosseini Ahad Ghaemi Rezvan Torkaman

Froude number

10.1016/j.seppur.2015.12.030

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Citations (26)

Optimization of Extractive Desulfurization of Diesel Oil in a Continuous Oldshue–Rushton Column Pilot Plant

Energy & Fuels (2019)

Mohammad Dana Shahrokh Shahhosseini Mohammad Amin Sobati Amin Ansari Mehdi Asadollahzadeh

In this study, a continuous sulfur extraction process in a pilot plant Oldshue–Rushton column has been studied, and its operating cost has been optimized, where the feed of the column was earlier produced in an oxidative desulfurization reactor. Dimethylformamide was used as a polar solvent to remove the sulfur-containing compounds of the oxidized diesel in the extraction column. The effects of agitation speed (100–200 rpm) and inlet flow rate of the solvent to the column (33–165 mL/min) on the holdup, sulfur removal, diesel recovery, and solvent recovery were investigated, utilizing the response surface methodology. The operating cost during the continuous-flow extraction process, consisting of the chemical cost, electricity cost, and the health cost related to the SO2 emission, was also applied as a criterion to optimize the process. The best performance of the extraction process was achieved at ambient temperature, where the inlet flow rate of the oxidized diesel was 99 mL/min, agitation speed was 107 rpm, and inlet flow rate of the solvent was 35 mL/min. In these conditions, dispersed phase holdup, sulfur removal, diesel recovery, and solvent recovery were 0.0101, 92.75, 91.80, and 96.90%, respectively. In addition, a considerable improvement in the sulfur removal as well as chemical consumption cost was achieved.

10.1021/acs.energyfuels.9b02793

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Citations (20)

CO 2 chemical absorption into aqueous solutions of piperazine: modeling of kinetics and mass transfer rate

Journal of Natural Gas Science and Engineering (2015)

Somayeh Norouzbahari Shahrokh Shahhosseini Ahad Ghaemi

Piperazine

Mass transfer coefficient

Dimensionless quantity

Reaction rate

Partial pressure

10.1016/j.jngse.2015.07.048

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Citations (36)

Improved structure of Zr-BTC metal organic framework using NH2 to enhance CO2 adsorption performance

Scientific Reports (2023)

Heidar Javdani Esfahani Shahrokh Shahhosseini Ahad Ghaemi

Modified mesoporous NH2-Zr-BTC mixed ligand MOF nanocomposites were synthesized via the hydrothermal method as a novel adsorbent for CO2 capture. The newly modified MOF-808 with NH2 demonstrated a similar mesoporous morphology as MOF-808, whereas the specific surface area, pore volume, and average particle size, respectively, increased by 15%, 6%, and 46% compared to those of MOF-808. The characterization analyses exhibited the formation of more active groups on the adsorbent surface after modification. In addition, a laboratory adsorption setup was used to evaluate the effect of temperature, pressure, and NH2 content on the CO2 adsorption capacity in the range of 25-65 °C, 1-9 bar, and 0-20 wt%, respectively. An increase in pressure and a decrease in temperature enhanced the adsorption capacity. The highest equilibrium adsorption capacity of 369.11 mg/g was achieved at 25 °C, 9 bar, and 20 wt% NH2. By adding 20 wt% NH2, the maximum adsorption capacity calculated by the Langmuir model increased by about 4% compared to that of pure MOF-808. Moreover, Ritchie second-order and Sips models were the best-fitted models to predict the kinetics and isotherm data of CO2 adsorption capacity with the high correlation coefficient (R2 > 0.99) and AARE% of less than 0.1. The ΔH°, ΔS°, and ΔG° values were - 17.360 kJ/mol, - 0.028 kJ/mol K, and - 8.975 kJ/mol, respectively, demonstrating a spontaneous, exothermic, and physical adsorption process. Furthermore, the capacity of MH-20% sample decreased from 279.05 to 257.56 mg/g after 15 cycles, verifying excellent stability of the prepared mix-ligand MOF sorbent.

Bar (unit)

Langmuir adsorption model

Exothermic reaction

Specific surface area

10.1038/s41598-023-44076-9

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Citations (13)