Mass transfer performance of CO<sub>2</sub> absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel

LIN Guanyi; ZHU Chunying; FU Taotao; MA Youguang

doi:10.11949/j.issn.0438-1157.20180591

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Mass transfer performance of CO₂ absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel

更新时间：2025-12-10

- Mass transfer performance of CO₂ absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel
- CIESC Journal Issue 11, Pages: 4675-4682(2018)
- 作者机构：
  
  化学工程联合国家重点实验室, 天津大学化工学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180591
  CLC： Q021.4
- Online First：05 November 2018，
  
  Published：05 November 2018
- 稿件说明：
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LIN Guanyi, ZHU Chunying, FU Taotao, et al. Mass transfer performance of CO₂ absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel[J]. CIESC Journal, 2018, (11): 4675-4682. DOI: 10.11949/j.issn.0438-1157.20180591.
DOI：

LIN Guanyi, ZHU Chunying, FU Taotao, et al. Mass transfer performance of CO₂ absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel[J]. CIESC Journal, 2018, (11): 4675-4682. DOI: 10.11949/j.issn.0438-1157.20180591. DOI：

摘要

研究了T形微通道内N-甲基二乙醇胺（MDEA）和单乙醇胺（MEA）混合水溶液吸收CO2的传质过程。考察了弹状流型下气液两相流量、MEA和MDEA浓度对液侧传质系数kL和体积传质系数kLa的影响。液侧传质系数和体积传质系数均会随着MEA浓度的升高而升高。与MEA相比，MDEA浓度的提高对传质影响较小。传质系数会随着液体流量的增大而增大，但气体流量的变化对其影响较小。体积传质系数随液体流量的增大而增大，但随气体流量的增大先增大，之后趋于稳定。考虑到化学反应对传质的强化作用，引入了Hatta数，提出了一个新的体积传质系数预测式，预测效果良好。

Abstract

A high speed camera was used to investigate the mass transfer performance of CO2 absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in T-shaped microchannel. Effects of two-phase flow rates

MEA and MDEA concentrations on liquid mass transfer coefficient kLand volumetric mass transfer coefficient kLa were investigated under slug flow. The mass transfer coefficient and volumetric mass transfer coefficient increased with the increase of MEA concentration

however

the MDEA concentration had an relatively small effect on mass transfer. The mass transfer coefficient and volumetric mass transfer coefficient increased with the increase of the liquid flow rate. The volumetric mass transfer coefficient increased rapidly

and then tended to a constant with gas flow rate

but the mass transfer coefficient was insensitive to gas flow rate. Considering the strengthening effect of chemical reaction on mass transfer

the Hatta number Ha is introduced

and a new volumetric mass transfer coefficient prediction formula is proposed. The predicted values agreed well with the experimental data.

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Mass transfer performance of CO2 absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel

DOI：10.11949/j.issn.0438-1157.20180591

摘要

Abstract

关键词

Keywords

references

Mass transfer performance of CO₂ absorption into aqueous mixture of monoethanolamine with N-methyldiethanolamine in microchannel