期刊
CHINESE JOURNAL OF CHEMICAL ENGINEERING
卷 20, 期 1, 页码 111-119出版社
CHEMICAL INDUSTRY PRESS CO LTD
DOI: 10.1016/S1004-9541(12)60370-X
关键词
miniaturization; microchannel; microfluidic; carbon dioxide; absorption; monoethanolamine
资金
- National Natural Science Foundation of China [20911130358]
- Ministry of Science and Technology of China [2009CB219903]
- Dalian Institute of Chemical Physics, CAS [K2009D01]
Process characteristics of CO2 absorption using aqueous monoethanolamine (MEA) in a microchannel reactor were investigated experimentally in this work. A T-type rectangular microchannel with a hydraulic diameter of 408 mu m was used. Operating parameters, i.e. temperature, pressure and molar ratio of MEA to CO2 were studied. Under 3 MPa pressure, the mole fraction of CO2 in gas phase could decrease from 32.3% to 300 x 10(-6) at least when gas hourly space velocity ranged from 14400 to 68600 h(-1) and molar ratio of MEA to CO2 was kept at 2.2. In particular, the effects of temperature on CO2 absorption flux, mass transfer driving force, gas-liquid contact time and enhancement factor were analyzed in detail and found that mass transfer enhancement by chemical reaction was a crucial factor for the process of CO2 absorption.
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