The use of catalysis for faster CO2 absorption and energy-efficient solvent regeneration: An industry-focused critical review

Meyer, Frédérick de; Bignaud, Charles

doi:10.1016/j.cej.2021.131264

Cited by 65 publications

(28 citation statements)

References 69 publications

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“…The latter is sometimes referred to as the micromixing process. 19 As the CO 2 -solvent reaction is in most cases categorized as a fast reaction, mass transfer through the liquid film near the gas-liquid interface is the limiting phenomenon for the overall absorption performance, 2,20 especially when the mixing-reaction process is rather quick compared to the interphase mass transfer. Improving the interphase mass transfer efficiency is thus of primary importance when developing new process intensification equipment and methods.…”

Section: Introductionmentioning

confidence: 99%

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

et al. 2022

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To develop cost-effective CO 2 capture technology process intensification will play a vital role. In this work, the capabilities of a gas-liquid vortex reactor (GLVR) as novel process intensification equipment are evaluated by studying its interphase mass transfer parameters to build up the fundamentals for its future application to for example, CO 2 capture. The NaOH-CO 2 chemisorption system and Danckwerts' model are applied to obtain the effective interfacial area and liquid-side mass transfer coefficient. Results show that the gas-liquid contact in the GLVR is capable of both generating a large interfacial area in a small reactor volume and creating a region with high-energy dissipation to improve mass transfer. A comparison of the volumetric mass transfer coefficients with data reported in literature for conventional and intensified reactor types confirms a superior mass transfer efficiency and, most importantly, a favorable energetic efficiency of the GLVR.

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Section: Introductionmentioning

confidence: 99%

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

et al. 2022

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“…As reported in many published works, ,,, the regeneration process of MEA solution (CO 2 desorption) includes the decomposition of carbamate (breakdown of the N–C bond) and the deprotonation of protonated amine (MEAH + ) . The high energy requirement in solvent regeneration is mainly caused by the deprotonation of MEAH + , as the CO 2 -loaded amine solution still presents an alkaline environment with lack of H + .…”

Section: Resultsmentioning

confidence: 99%

“…Recently, the solid acid catalyst-aided CO 2 desorption process has attracted much attention aiming to minimize the energy consumption of the process: − the addition of solid acid catalysts allows the CO 2 desorption process to be performed at a relatively low temperature (below 100 °C), which not only accelerates the CO 2 desorption rate but also decreases the heat consumption for releasing CO 2 . It is commonly accepted that the main contributors for the high heat consumption during CO 2 desorption are the carbamate decomposition and deprotonation of protonated amine, and both processes involve proton transfer. , Solid acid catalysts can promote the two reaction processes mentioned above because of their remarkable acidity and the presence of the Brønsted and Lewis acid sites .…”

Section: Introductionmentioning

confidence: 99%

Energy-Saving Effect of Low-Cost and Environmentally Friendly Sepiolite as an Efficient Catalyst Carrier for CO₂ Capture

Zhang

et al. 2023

ACS Sustainable Chem. Eng.

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Recently, the development of efficient solid acid catalysts to promote the CO 2 desorption rate while reducing energy consumption has attracted much attention. In this work, low-cost environmentally friendly sepiolite (SEP) clay was evaluated as a support of metal oxide (Fe 2 O 3 , CuO) catalysts. By comparing their catalytic performances for CO 2 desorption from CO 2 -rich monoethanolamine (MEA) solution at 100 °C, the obtained results showed that the tested catalysts can accelerate the CO 2 release rate and reduce heat consumption in comparison with the non-catalytic MEA solution. The relative heat duty found decreased in the following order: blank (100%) > SEP (66.4%) > CuO-SEP (58.8%) > Fe 2 O 3 -SEP (54.0%). Recycling tests to study stability demonstrated that Fe 2 O 3 -SEP can maintain its catalytic efficiency after six recycling runs. Characterization studies revealed that a high mesoporous specific surface area and a high ratio of Brønsted and Lewis acid sites are beneficial to enhancing the activity of the catalysts. In addition, a possible catalytic mechanism for CO 2 desorption was proposed. As a result, this work proved that SEP has the potential to be a low-cost and competitive catalyst carrier for CO 2 capture.

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“…To tackle this problem, several approaches were suggested. Several studies reported that the usage of a catalyst allows one to speed up the absorption of CO 2 and/or to lower the energetic cost of solvent regeneration 8 . Another option, which is currently followed by the industry, consists in adding an activator, piperazine, significantly boosting the overall CO 2 absorption rate without increasing the regeneration energy too much 9 .…”

Section: Introductionmentioning

confidence: 99%

Computational screening methodology identifies effective solvents for CO2 capture

et al. 2022

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Carbon capture and storage technologies are projected to increasingly contribute to cleaner energy transitions by significantly reducing CO2 emissions from fossil fuel-driven power and industrial plants. The industry standard technology for CO2 capture is chemical absorption with aqueous alkanolamines, which are often being mixed with an activator, piperazine, to increase the overall CO2 absorption rate. Inefficiency of the process due to the parasitic energy required for thermal regeneration of the solvent drives the search for new tertiary amines with better kinetics. Improving the efficiency of experimental screening using computational tools is challenging due to the complex nature of chemical absorption. We have developed a novel computational approach that combines kinetic experiments, molecular simulations and machine learning for the in silico screening of hundreds of prospective candidates and identify a class of tertiary amines that absorbs CO2 faster than a typical commercial solvent when mixed with piperazine, which was confirmed experimentally.

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The use of catalysis for faster CO2 absorption and energy-efficient solvent regeneration: An industry-focused critical review

Cited by 65 publications

References 69 publications

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Energy-Saving Effect of Low-Cost and Environmentally Friendly Sepiolite as an Efficient Catalyst Carrier for CO₂ Capture

Computational screening methodology identifies effective solvents for CO2 capture

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The use of catalysis for faster CO2 absorption and energy-efficient solvent regeneration: An industry-focused critical review

Cited by 65 publications

References 69 publications

Chemisorption of CO2 in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO2 in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Energy-Saving Effect of Low-Cost and Environmentally Friendly Sepiolite as an Efficient Catalyst Carrier for CO2 Capture

Computational screening methodology identifies effective solvents for CO2 capture

Contact Info

Product

Resources

About

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Energy-Saving Effect of Low-Cost and Environmentally Friendly Sepiolite as an Efficient Catalyst Carrier for CO₂ Capture