活性炭粒子对K2CO3溶液中CO2化学吸收的强化

CIESC Journal

• TRANSPORT PHENOMENA & FLUID MECHANICS • 上一篇下一篇

活性炭粒子对K₂CO₃溶液中CO₂化学吸收的强化

卢素敏; 马友光; 朱春英; 沈树华

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin Univer-sity, Tianjin 300072, China

收稿日期:2007-06-06 修回日期:1900-01-01 出版日期:2007-12-28 发布日期:2007-12-28
通讯作者: 卢素敏

The enhancement of CO₂ chemical absorption by K₂CO₃ aqueous solution in the presence of activated carbon particles

LU Sumin; MA Youguang; ZHU Chunying; SHEN Shuhua

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin Univer-sity, Tianjin 300072, China

Received:2007-06-06 Revised:1900-01-01 Online:2007-12-28 Published:2007-12-28
Contact: LU Sumin

摘要/Abstract

摘要： The enhancement of chemical absorption of CO2 by K2CO3/H2O absorbents in the presence of activated carbon (AC) particles was investigated. The results show that the gas absorption rates can be enhanced significantly in the presence of AC particles, and the maximum enhancement factor 3.7 was observed at low stirring intensities. The enhancement factor increased rapidly with the solid loading during the initial period of absorption and then became mild gradually to a maximum value. Both the liquid-solid contact area and the probability of solid particles residing at the gas-liquid interface decreased with the increase of the particle size, leading to a negative effect on the enhancement of mass transfer. The influence of the particles on gas absorption decreased with the reaction rate. The stirring speed changed the interfacial coverage and mass transfer rate on the liquid side and consequently affected the mass transfer between the gas and liquid phases; the enhancement factor decreased with the stirring intensity. A heterogeneous two-zone model was proposed for predicting the enhancement factor and the calculated results agreed well with the experimental data.

关键词: chemical absorption;enhancement factor;mass transfer;activated carbon particle

Abstract:

The enhancement of chemical absorption of CO2 by K2CO3/H2O absorbents in the presence of activated carbon (AC) particles was investigated. The results show that the gas absorption rates can be enhanced significantly in the presence of AC particles, and the maximum enhancement factor 3.7 was observed at low stirring intensities. The enhancement factor increased rapidly with the solid loading during the initial period of absorption and then became mild gradually to a maximum value. Both the liquid-solid contact area and the probability of solid particles residing at the gas-liquid interface decreased with the increase of the particle size, leading to a negative effect on the enhancement of mass transfer. The influence of the particles on gas absorption decreased with the reaction rate. The stirring speed changed the interfacial coverage and mass transfer rate on the liquid side and consequently affected the mass transfer between the gas and liquid phases; the enhancement factor decreased with the stirring intensity. A heterogeneous two-zone model was proposed for predicting the enhancement factor and the calculated results agreed well with the experimental data.

Key words: chemical absorption, enhancement factor, mass transfer, activated carbon particle

卢素敏, 马友光, 朱春英, 沈树华. 活性炭粒子对K₂CO₃溶液中CO₂化学吸收的强化[J]. CIESC Journal.

LU Sumin, MA Youguang, ZHU Chunying, SHEN Shuhua. The enhancement of CO₂ chemical absorption by K₂CO₃ aqueous solution in the presence of activated carbon particles[J]. .

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活性炭粒子对K₂CO₃溶液中CO₂化学吸收的强化

The enhancement of CO₂ chemical absorption by K₂CO₃ aqueous solution in the presence of activated carbon particles

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