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 ...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 μm 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 300×10?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 en-hancement factor were analyzed in detail and found that mass transfer enhancement by chemical reaction was a crucial factor for the process of CO2 absorption.展开更多
保温层下腐蚀（Corrosion Under Insulation简称CUI）是指发生在包裹保温材料的管道或设备外表面上的一种腐蚀现象。仅仅石化行业每年因为保温层下钢结构的腐蚀造成的损失可达数十亿美元，不仅造成设备故障与停工，产品泄漏，维修成本...保温层下腐蚀（Corrosion Under Insulation简称CUI）是指发生在包裹保温材料的管道或设备外表面上的一种腐蚀现象。仅仅石化行业每年因为保温层下钢结构的腐蚀造成的损失可达数十亿美元，不仅造成设备故障与停工，产品泄漏，维修成本大量增加，严重的甚至可能造成伤亡事故。展开更多
基金Supported by the National Natural Science Foundation of China (20911130358)the Ministry of Science and Technology of China (2009CB219903)the Fund of Dalian Institute of Chemical Physics,CAS (K2009D01)
文摘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 μm 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 300×10?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 en-hancement factor were analyzed in detail and found that mass transfer enhancement by chemical reaction was a crucial factor for the process of CO2 absorption.
