期刊
JOURNAL OF THE ENERGY INSTITUTE
卷 90, 期 6, 页码 933-940出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.joei.2016.08.001
关键词
Functional protic ionic liquid; CO2 capture; Membrane absorption; Performance evaluation
资金
- Ministry of Environmental Protection of China [201409081, 201509020]
- National Natural Science Foundation of China [21406116]
- Natural Science Foundation of Jiangsu Province of China [BK20150892]
- Natural Science Foundation of Jiangsu Higher Education Institution of China [15KJB610012]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) of China
- Students Practical and Innovational Training Project of Jiangsu Province of China [201610300097]
An amino acid-functionalized protic ionic liquid (IL), monoethanolamine glycinate ([MEA][GLY]), was used as a CO2 absorbent. Its performance was evaluated by a membrane gas absorption (MGA) process. Various effect factors including both absorbent aspect and operational parameters were investigated in MGA for CO2 capture. Performance of [MEA][GLY] IL was also compared with that of an amino acid salt and an amine. Liquid CO2 loading of the functional protic IL was the largest in three absorbents, presenting an order of [MEA][GLY]>PGLY>MEA. [MEA][GLY] IL obtained a high membrane flux and a low gas outlet CO2 concentration in MGA process. It could reach 3.25 x 10(-4) mol m(-2) s(-1) of membrane flux. The IL could achieve higher initial and instantaneous membrane fluxes and the maximal membrane flux with a range of optimum concentration of 3.5-4.5 mol L-1. Change of operational parameters, especially gas CO2 mole fraction, can significantly affect and enhance the membrane flux of MGA on a limited scale. [MEA][GLY] IL is a more environmentally-friendly and efficient CO2 absorbent. (C) 2016 Energy Institute. Published by Elsevier Ltd. All rights reserved.
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