CO2 absorption into aqueous diethanolamine solution with nano heavy metal oxide particles using stirrer bubble column: Hydrodynamics and mass transfer

Pashaei, Hassan; Ghaemi, Ahad

doi:10.1016/j.jece.2020.104110

Cited by 37 publications

(22 citation statements)

References 46 publications

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“…The material balance equations were presented in Eq. (10). The general equation for the heat transfer across a surface is as follows:…”

Section: Heat Exchanger Equationsmentioning

confidence: 99%

“…The selection of an extremely effective chemical solvent that can meet beneficial requirements such as a high absorption capacity, high chemical and thermal stability, rapid reaction kinetics, and large regeneration energy savings is one of the most pivotal factors in chemical absorption [ 6 ]. Aqueous solvents of alkanolamine such as diethanolamine (DEA) and methyl DEA (MDEA) have been used as industrial chemical absorbents in scrubber units [ 10 ], but these amine solvents require large amounts of energy for their regeneration [ 11 ]. Aqueous solutions of MDEA and DEA are widely used in industrial treatment, especially for acid gas streams containing H 2 S and CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Ibrahim

Ashour

Gadalla

2021

Heliyon

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Refinery plants use diethanolamine (DEA) solutions for gas sweetening. The role of DEA is to absorb H 2 S from sour gas. Amine Regeneration Units (ARU) are used to regenerate the rich Amine with H 2 S from refinery units to Lean Amine. An ARU unit of a Middle Eastern refinery that began official production in 2020 was simulated using Aspen HYSYS V.11, and an exergy study was conducted on different equipment. Whereas energy is transformed from one form to another, the exergy is destroyed in an irreversible process. The total exergy was equal to the physical and chemical exergy. The physical exergy was calculated using HYSYS, and the chemical exergy was calculated using a series of equations embedded in Excel. The DEA concentration used was 25 wt%. The exergy destruction rates, destruction efficiency, and percentage share of destruction of each piece of equipment were calculated. The regenerator exhibited the highest destruction rate of 13459.73 kW, and a percentage share of 79.61% of the total destruction. The overall exergy efficiency was 99.7%. The DEA concentration decreased from 25% to 20% as a result of system losses during start-up. Therefore, a case study was conducted to test the effect of this decrease in the H 2 S concentration in the sweet gas, and no effect was observed. An exergy study was conducted using an DEA of 20%. The distribution of the equipment destruction did not change. The total destruction loss increased by 2057.08 kW. From the exergy and operation point of view, the best scenario was to use a 25% concentration, to prevent destruction losses and operation problems.

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“…The material balance equations were presented in Eq. (10). The general equation for the heat transfer across a surface is as follows:…”

Section: Heat Exchanger Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Ibrahim

Ashour

Gadalla

2021

Heliyon

View full text Add to dashboard Cite

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“…Since the purity of product gas at the maximum absorption efficiency was lower than 90%, we then extended our findings to the physicochemical absorption using MEA, where the required amount of solvent used significantly affects the process viability. Note that, in general chemisorption process, relatively high concentration of solvent is required to achieve high CO 2 absorption efficiency, i.e., 30 wt.% of MEA solution [3,4].…”

Section: Physicochemical Absorptionmentioning

confidence: 99%

“…Over the past decades, many CO 2 separation methods have been proposed such as absorption, adsorption, and membrane separation [2]. Among these methods, CO 2 absorption is the most widely used due to the relatively lower operating cost and higher efficiency [3]. However, amid the successes, the use of toxic chemical solvents has been involved, causing serious impact on the environment (corrosion) and economic sustainability.…”

Section: Introductionmentioning

confidence: 99%

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Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

et al. 2020

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This work focused on the application of a microchannel contactor for CO2 capture using water as absorbent, especially for the application of CO2-rich gas. The influence of operating conditions (temperature, volumetric flow rate of gas and liquid, and CO2 concentration) on the absorption efficiency and the overall liquid-side volumetric mass transfer coefficient was presented in terms of the main effects and interactions based on the factorial design of experiments. It was found that 70.9% of CO2 capture was achieved under the operating conditions as follows; temperature of 50 °C, CO2 inlet fraction of 53.7%, total gas volumetric flow rate of 150 mL min−1, and adsorbent volumetric flow rate of 1 mL min−1. Outstanding performance of CO2 capture was demonstrated with the overall liquid-side volumetric mass transfer coefficient of 0.26 s−1. Further enhancing the system by using 2.2 M of monoethanolamine in water (1:1 molar ratio of MEA-to-CO2) boosted the absorption efficiency up to 88%.

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CO₂ capture by benzene‐based hypercrosslinked polymer adsorbent: Artificial neural network and response surface methodology

2023

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In this research, porous benzene‐based hypercrosslinked polymeric adsorbents with different morphological properties were synthesized through Friedel–Crafts alkylation reaction. The resulting samples were applied for CO2 capture at different operational conditions. Two modelling approaches, including artificial neural network (radial basis function [RBF] and multi layer perceptron [MLP]) and response surface methodology (RSM), were employed to investigate the effect of independent parameters on adsorption capacity. A semi‐empirical quadratic model for adsorption capacity was presented based on RSM‐central composite design technique. Additionally, the optimal structure of RBF was determined with 200 neurons, and the optimal structure of MLP was determined with three hidden layers and 10, 8, and 7 neurons. The modelling results demonstrate the better prediction of MLP and RBF approaches than the RSM method with correlation coefficient values of 0.999, 0.989, and 0.931, respectively. Finally, process optimization was carried out using RSM optimization module and the optimized values of synthesis time, crosslinker ratio (formaldehyde dimethyl acetal [FDA]/benzene), adsorption time, pressure, and temperature were obtained at 10.11 h, 1, 220 s, 9 bar, and 55°C, respectively. The optimum value of CO2 uptake capacity was obtained around 167 (mg/g).

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CO2 absorption into aqueous diethanolamine solution with nano heavy metal oxide particles using stirrer bubble column: Hydrodynamics and mass transfer

Cited by 37 publications

References 46 publications

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

CO₂ capture by benzene‐based hypercrosslinked polymer adsorbent: Artificial neural network and response surface methodology

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CO2 absorption into aqueous diethanolamine solution with nano heavy metal oxide particles using stirrer bubble column: Hydrodynamics and mass transfer

Cited by 37 publications

References 46 publications

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Exergy study of amine regeneration unit using diethanolamine in a refinery plant: A real start-up plant

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

CO2 capture by benzene‐based hypercrosslinked polymer adsorbent: Artificial neural network and response surface methodology

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Product

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About

CO₂ capture by benzene‐based hypercrosslinked polymer adsorbent: Artificial neural network and response surface methodology