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首页> 外文期刊>Energy & fuels >Membrane Evaporation for Energy Saving in CO2 Chemical Absorption Process Using a Polybenzimidazole Film: Mass and Heat Transfer
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Membrane Evaporation for Energy Saving in CO2 Chemical Absorption Process Using a Polybenzimidazole Film: Mass and Heat Transfer

机译：使用聚苯并咪唑膜的膜蒸发可节省二氧化碳化学吸收过程中的能量：传质和传热

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摘要

Intensive energy consumption remains a major challenge for the commercial application of CO2 chemical absorption. In this study, a membrane evaporation system based on PBI film was proposed for recovering latent heat from the hot lean CO2 solution in order to reduce the energy penalty during CO2 capture process. The effects of key operational parameters (i.e., evaporation temperature, sweeping gas flow rate, and liquid flow rate) were systematically investigated. It was found that both vapor flux and recovered heat flux had exponential increases when the evaporation temperature increased. Sweeping gas flow rate and liquid flow rate had limited effects on both mass and heat transfer in the membrane evaporation process. The PBI film showed good stability during a 14 days' duration experiment. Reducing the membrane thickness can significantly improve the membrane evaporation performance. From the viewpoint of energy evaluation, when the evaporation mass reached 10 g/kg solution, the regeneration energy consumption could be reduced by 0.47 MJ/kg CO2, which demonstrates a great potential to save energy consumption in large-scale CO2 chemical absorption processes.
机译：对于CO 2化学吸收的商业应用，密集的能耗仍然是主要的挑战。在这项研究中，提出了一种基于PBI膜的膜蒸发系统，用于从热的贫二氧化碳溶液中回收潜热，以减少二氧化碳捕获过程中的能量损失。系统地研究了关键操作参数（即蒸发温度，吹扫气体流速和液体流速）的影响。发现当蒸发温度升高时，蒸汽通量和回收的热通量均呈指数增加。吹扫气体流速和液体流速对膜蒸发过程中的传质和传热影响有限。在持续14天的实验中，PBI膜显示出良好的稳定性。减小膜厚度可以显着改善膜蒸发性能。从能量评估的角度来看，当蒸发量达到10 g / kg溶液时，可将再生能耗降低0.47 MJ / kg CO2，这表明在大规模CO2化学吸收过程中具有巨大的节能潜力。

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  • 来源
    《Energy & fuels》 |2017年第10期|11091-11098|共8页
  • 作者

    Ma Qinhui; Fang Mengxiang; Wang Tao; Yu Hai; Feron Paul H. M.;

  • 作者单位

    Zhejiang Univ, State Key Lab Clean Energy Utilizat, Zheda Rd 38, Hangzhou 310027, Zhejiang, Peoples R China|CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, NSW 2304, Australia;

    Zhejiang Univ, State Key Lab Clean Energy Utilizat, Zheda Rd 38, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, State Key Lab Clean Energy Utilizat, Zheda Rd 38, Hangzhou 310027, Zhejiang, Peoples R China;

    CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, NSW 2304, Australia;

    CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, NSW 2304, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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