CIESC Journal ›› 2019, Vol. 70 ›› Issue (7): 2448-2455.DOI: 10.11949/0438-1157.20190142

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Flow behavior and stripping enhancement of CO2 desorption process in microreactor

Hongchen LIU1,2(),Feng ZHOU1,Chaoqun YAO1,Guangwen CHEN1()   

  1. 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    2. School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, Shaanxi, China
  • Received:2019-02-22 Revised:2019-04-12 Online:2019-07-05 Published:2019-07-05
  • Contact: Guangwen CHEN

微反应器内CO2解吸过程流动行为及气提强化

刘宏臣1,2(),周峰1,尧超群1,陈光文1()   

  1. 1. 中国科学院大连化学物理研究所,辽宁 大连 116023
    2. 西安工程大学环境与化学工程学院,陕西 西安 710048
  • 通讯作者: 陈光文
  • 作者简介:刘宏臣(1989—),男,博士研究生,讲师,<email>liuhc1108@163.com</email>
  • 基金资助:
    中国科学院青年创新促进会项目(2017229);科技部重点领域创新团队项目(2016RA4053)

Abstract:

The flow pattern and stripping enhancement of CO2 desorption from N-methyldiethanolamine solution were investigated in microreactor. It is observed that the gas-liquid two-phase flow patterns in the desorption process mainly include bubble flow, slug flow, annular flow and fine circulation. However, the periodic change of flow patterns resulted in the fluctuation of bubble velocity at high temperature. According to the results of stripping enhancement on the CO2 desorption, it showed that CO2 desorption rate was significantly enhanced at low solution rate by adding small amount of inert gas, while excessive gas will lead to a reduction in the solution residence time. The optimal inert gas flow rate was determined by calculating the stripping enhancement per unit gas flow rate.

Key words: microreactor, CO2 capture, desorption, N-methyldiethanolamine, flow pattern, stripping

摘要:

研究了微反应器内N-甲基二乙醇胺溶液解吸过程的流动和气提强化行为。观测到解吸过程中气-液两相流型主要有泡状流、弹状流、环状流和细环流。高温时,流型交替演化将导致气泡速度波动。气提促进强化CO2解吸过程的结果表明,低溶液流量时,少量惰性气体就可显著提高CO2解吸速率;大惰性气体流量将缩短停留时间,经计算解吸强化效率,确定了解吸过程的最佳气提流量。

关键词: 微反应器, 二氧化碳捕集, 解吸, N-甲基二乙醇胺, 流型, 气提

CLC Number: