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Experimental investigation on gas-liquid mass transfer with fast chemical reaction in microchannel

机译:微通道内快速化学反应气液传质的实验研究

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摘要

The gas-liquid two-phase flow and mass transfer with fast chemical reaction in a microchannel were investigated experimentally. Result showed that the bubble volume decreased exponentially with its movement along the channel in a quickly reactable absorbent. The volumetric mass transfer coefficient k_La increased with gas flow rate, while it was insensitive to liquid flow rate under experimental conditions, although the mass transfer coefficient k_L increased with liquid flow rate. In slug-bubbly flow regime, the k_L decreased when increasing gas flow rate, but inverse tendency was found for slug flow pattern. Both k_L and k_La increased with the increase of absorbent concentration. A new correlation for predicting the volumetric mass transfer coefficients k_La was proposed by taking the enhancement factor E of chemical reaction into account.
机译:实验研究了微通道中具有快速化学反应的气液两相流动和传质。结果表明,气泡体积在可快速反应的吸收剂中随着沿通道的移动而呈指数下降。体积传质系数k_La随气体流速而增加,而在实验条件下对液体流速不敏感,尽管传质系数k_L随液体流速而增加。在团状气泡流态中,k_L随气体流速的增加而减小,但在团状流态中却存在相反的趋势。 k_L和k_La都随着吸收剂浓度的增加而增加。通过考虑化学反应的增强因子E,提出了一种预测体积传质系数k_La的新的相关性。

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  • 作者单位

    State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China;

    State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China;

    State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China;

    State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China;

    Laboratory of Reactions and Process Engineering, University of Lorraine, CNRS, 1, rue Grandville, BP 20451, Nancy cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chemical absorption; Gas-liquid two-phase flow; Mass transfer; Microchannel;

    机译:化学吸收气液两相流;传质;微通道;

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