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CO_2 removal from synthesized ternary gas mixtures used hydrate formation with sodium dodecyl sulfate(SDS) as additive

机译:CO_2从合成的三元气体混合物中除去含有十二烷基硫酸钠(SDS)作为添加剂的水合物形成

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摘要

In order to investigate the hydrate formation kinetics of the ternary gas mixtures containing sodium dodecyl sulfate (SDS) and evaluate the applicability of hydrate based gas separation (HBGS) technology to biogas, synthesized ternary gas mixture (CH_4/CO_2N_2) hydrate formation processes with different concentrations of SDS were investigated comprehensively in this work. The changes in the gas composition during the hydrate formation process, the gas consumption of the hydrate, the effective reaction time, the recovery factor of CH_4, the split ratio of CO_2, and the microscopic promotion mechanism of SDS for the hydrate were studied. The results indicated that the addition of SDS increased the hydrate reaction rate and gas consumption compared with those in a pure water system. The promotional effect of SDS improved with an increase in its concentration. The maximum CO_2 split ratio was 0.95, at a driving force of 4.4 MPa and 0.05% SDS concentration. The maximum CH_4 recovery factor was 3.18, at a driving force of 6.4 MPa and 0.03% SDS concentration. SDS promoted the formation of CO_2 hydrate more strongly than that of CH_4 and N_2 for the ternary gas mixture. In summary, HBGS technology exhibited a good separation effect under two experimental conditions.
机译:为了研究含有十二烷基硫酸钠(SDS)的三元气体混合物的水合物形成动力学,并评估水合物基气体分离(HBGS)技术对沼气,合成的三元气体混合物(CH_4 / CO_2N_2)水合物形成过程不同在这项工作中全面调查SDS浓度。研究了水合物形成过程中气体组合物的变化,水合物的气体消耗,有效反应时间,CH_4的恢复因子,CO_2的分裂比以及SDS用于水合物的微观促进机理。结果表明,与纯水系统中的那些相比,SDS的添加增加了水合物反应速率和气体消耗。 SDS的促进效果随浓度的增加而改善。最大CO_2分流比为0.95,在4.4MPa的驱动力和0.05%SDS浓度下。最大CH_4恢复因子为3.18,处于6.4MPa和0.03%SDS浓度的驱动力。 SDS促进了比三元气体混合物的CH_4和N_2更强烈的CO_2水合物的形成。总之,HBGS技术在两个实验条件下表现出良好的分离效果。

著录项

  • 来源
    《Energy》 |2020年第1期|116399.1-116399.11|共11页
  • 作者单位

    Guangzhou Institute of Energy Conversion Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guangzhou 510640 China CAS Key Laboratory of Gas Hydrate Guangzhou 510640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China;

    Guangzhou Institute of Energy Conversion Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guangzhou 510640 China CAS Key Laboratory of Gas Hydrate Guangzhou 510640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China;

    Guangzhou Institute of Energy Conversion Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guangzhou 510640 China CAS Key Laboratory of Gas Hydrate Guangzhou 510640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China;

    Guangzhou Institute of Energy Conversion Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guangzhou 510640 China CAS Key Laboratory of Gas Hydrate Guangzhou 510640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hydrate formation; Gas separation; CO_2; SDS;

    机译:水合物形成;气体分离;CO_2;SDS.;

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