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首页> 外文期刊>International journal of hydrogen energy >Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification
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Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification

机译：具有催化支撑膜的微流体重整器中的化学和运输行为，可高效生产和纯化氢气

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摘要

MicroChannel reformer integrated with H_2 selective membrane offers an efficient, compact and portable way to produce hydrogen. The performance of a membrane-based microfluidic reformer is restricted by species diffusion limitation within the porous support of the membrane. Recent development in novel catalytic-supported membranes has the potential to enhance H_2 production by decimating the diffusion limitation. Loading a Pd-Ag layer on to a Ni-catalytic porous support, the membrane achieves both H_2 separation and production functions. In this study, a two-dimensional CFD model combined with chemical kinetics has been developed to simulate a microchannel autothermal reformer fed by methane. The species conversion and transport behaviors have been studied. The results show that the permeation process enhances the mass transport within the catalytic layer, and as a result, the reactions are intensified. Most notably, the effectiveness factor of the water-gas shift reaction as high as 6 is obtained. In addition, the effects of gaseous hourly space velocity (GHSV) on methane conversion and H_2 flux through the membrane are also discussed, and an optimal value of GHSV is suggested.
机译：集成有H_2选择性膜的MicroChannel重整器提供了一种高效，紧凑和便携式的制氢方法。基于膜的微流体重整器的性能受到膜的多孔载体内物质扩散限制的限制。新型催化负载膜的最新发展具有通过降低扩散限制来提高H_2产生的潜力。该膜将Pd-Ag层装载到Ni催化的多孔载体上，既实现了H_2分离又具有生产功能。在这项研究中，已开发了结合化学动力学的二维CFD模型来模拟由甲烷供料的微通道自热重整器。已经研究了物种转化和运输行为。结果表明，渗透过程增强了催化层内的质量传递，结果，反应被增强。最值得注意的是，获得的水煤气变换反应的效率因子高达6。此外，还讨论了气时空速（GHSV）对甲烷转化率和H_2通过膜的通量的影响，并提出了GHSV的最佳值。

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  • 来源
    《International journal of hydrogen energy》 |2012年第3期|p.2614-2622|共9页
  • 作者

    Jin Xuan; Dennis Y.C. Leung; Michael K.H. Leung; Meng Ni; Huizhi Wang;

  • 作者单位

    Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China;

    Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China;

    Ability R&D Energy Research Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China;

    Department of Building and Real Estate, Hong Kong Polytechnic University, Hong Kong, China;

    Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China;

  • 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
  • 中图分类
  • 关键词

    hydrogen; microfluidics; membrane; autothermal reforming; porous media;

    机译：氢;微流体膜;自热重整多孔介质;

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