LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO<sub>2</sub> dissolution process

HU Nan; ZHANG Huishu; FU Qiang; LI Luxing; YUAN Xigang

doi:10.11949/j.issn.0438-1157.20161462

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LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO₂ dissolution process

更新时间：2025-12-10

- LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO₂ dissolution process
- CIESC Journal Issue 2, Pages: 584-593(2017)
- 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.0438-1157.20161462
  CLC： Q028
- Online First：05 February 2017，
  
  Published：05 February 2017
- 稿件说明：
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HU Nan, ZHANG Huishu, FU Qiang, et al. LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO₂ dissolution process[J]. CIESC Journal, 2017, (2): 584-593. DOI: 10.11949/j.issn.0438-1157.20161462.
DOI：

HU Nan, ZHANG Huishu, FU Qiang, et al. LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO₂ dissolution process[J]. CIESC Journal, 2017, (2): 584-593. DOI: 10.11949/j.issn.0438-1157.20161462. DOI：

摘要

采用激光诱导荧光（LIF）观测方法考察了在气相中分别添加乙醇和二氯甲烷分别对CO2在水中溶解过程界面对流的影响，得到了液相中CO2浓度分布及其演化的观测结果，通过物料衡算得到了相应条件下的液相传质系数。CO2溶解过程会出现由密度梯度引起的Rayleigh对流。实验结果表明，当添加的乙醇含量小于8.47 mg·L-1时，Rayleigh对流会被增强，进而促进了CO2的溶解；随着气相中乙醇含量的增大，Rayleigh对流反而被抑制；气相添加二氯甲烷会显著增强Rayleigh对流，提高了CO2的传质速率，随着气相二氯甲烷含量的增大，CO2在水中溶解过程的液相传质系数呈现先加强后恒定的趋势。

Abstract

Laser induced fluorescence (LIF) technique was employed to investigate the influence of additive component in gas phase on interfacial convection in the process of water-CO2 dissolution. CO2 concentration distributions in the liquid and their evolutions were obtained. Liquid side mass transfer coefficients were estimated using the measurement results. Rayleigh convection in the liquid occurred during water-CO2 dissolution due to density gradient near the interface. The results showed that with the addition of ethanol of a low concentration (<8.47 mg·L-1) in the gas

the Rayleigh convection enhanced and liquid side mass transfer was enforced. With further increase of ethanol concentration in the gas

Rayleigh convection and thus the liquid side mass transfer were inhibited. The experimental results also showed that the addition of dichloromethane in the gas is enhanced by both Rayleigh convection and the liquid side mass transfer for the process of CO2 dissolution in water. With the increase of the concentration of dichloromethane in the gas

the liquid mass transfer coefficient tended to become constant.

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Related Author

YUAN Xigang

HU Nan

LI Luxing

Mingyan LIU

Chen LI

Yongli MA

Kaiyue WANG

Xiaodong XU

Related Institution

State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University

School of Chemical Engineering, Tianjin University

State Key Laboratory of Chemical Engineering(Tianjin University)

College of Mechanical and Electronic Engineering, Nanjing Forestry University

State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University

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LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO2 dissolution process

DOI：10.11949/j.issn.0438-1157.20161462

摘要

Abstract

关键词

Keywords

references

LIF measurement for effect of additive component in gas phase on interfacial convection for water-CO₂ dissolution process