Application of 'coordinative effect' into tri-solvent MEA+BEA+AMP blends at concentrations of 0.1 + 2 + 2∼0.5 + 2 + 2 mol/L with absorption, desorption and mass transfer analyses
| Autor: | Huancong Shi, Paitoon Tontiwachwuthikul, Mingqi Cui, Luoqiu Quan, Zhiwu Liang, Jinjin Han, Min Huang, Junxing Fu, Wenhao Dai |
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| Rok vydání: | 2021 |
| Předmět: |
Mass transfer coefficient
Chemistry Inorganic chemistry Batch reactor 02 engineering and technology Structured packing 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Pollution Industrial and Manufacturing Engineering Solvent General Energy 020401 chemical engineering Desorption Mass transfer Amine gas treating 0204 chemical engineering Absorption (chemistry) 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Greenhouse Gas Control. 107:103267 |
| ISSN: | 1750-5836 |
| DOI: | 10.1016/j.ijggc.2021.103267 |
| Popis: | The “coordinative effect” was discovered in MEA + DEA solvents in 2018 via CO2 absorption, and it could enhance both CO2 absorption & desorption within MEA + RR’NH solvents. This study expanded the scope out of MEA + DEA and implemented it by blending MEA into BEA(RR’NH)+AMP solvents. The CO2 absorption, desorption and mass transfer performance were evaluated onto MEA + BEA + AMP (0.1 + 2 + 2∼0.5 + 2 + 2 mol/L) in the batch reactor, recirculation process, and lab-scale absorber with DX structured packing and compared with BEA + AMP (2 + 2 mol/L). The CO2 absorption-desorption parameters were adopted to analyze the coordinative effects. Then, the mass transfer of these 5 tri-solvents were tested by overall mass transfer coefficient (KGav) to evaluate the gas-liquid interactions in an industrial CO2 absorber. The results indicated that the “coordinative effect” of MEA + RR’NH resulted in superior performance of MEA + BEA + AMP (0.3∼0.4 + 2 + 2) over BEA + AMP (2 + 2) on both CO2 absorption and desorption sides, contrary to the conventional concept that MEA enhances absorption but deteriorates desorption of amine blends. |
| Databáze: | OpenAIRE |
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