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首页> 外文期刊>Journal of power sources >Catalyst evaluation for high-purity H-2 production by sorption-enhanced steam-methane reforming coupled to a Ca/Cu process
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Catalyst evaluation for high-purity H-2 production by sorption-enhanced steam-methane reforming coupled to a Ca/Cu process

机译：通过结合Ca / Cu工艺的吸附增强型蒸汽甲烷重整制得的高纯度H-2生产催化剂的评估

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摘要

The operational limits of a commercial nickel-based catalyst under theconditions of a sorption-enhanced steam-methane reforming process coupled to a Ca/Cu chemical loop are investigated for high-purity H-2 production in a cyclic operation. The performance of the reforming catalyst is tested by means of a high number of oxidation-reduction-reforming cycles. After 100 oxidation-reduction cycles, this catalyst retains its exceptional reforming activity. The methane conversion values are close to the thermodynamic equilibrium under very demanding conditions: temperature between 500 degrees C - 700 degrees C and mass hourly space velocity of 8.8 kgCH(4) h(-1) kgcat(-1). After 200 cycles, the sample shows reduction in its reforming activity in line with a lower dispersion of the Ni species. Sintering of Ni nanocrystals is evidenced during the oxidation-reduction multi-cycles. The performance of the catalyst after 200 oxidation-reduction cycles mixed with a CaO-based CO2 sorbent is studied under optimal conditions calculated for the sorption-enhanced reforming process coupled to a Ca/Cu cycle (temperature of 650 degrees C, steam/methane ratio of 4, sorbent/catalyst ratio of 4 and space velocity of 0.75 kgCH(4) h(-1) kgcat(-1)). Remarkably, an equilibrium value over 92 vol.% H-2 concentration is achieved, highlighting this catalyst as a promising candidate for the next steps of the process development. (C) 2017 Elsevier B.V. All rights reserved.
机译：针对循环运行中高纯度H-2的生产，研究了在吸附增强的蒸汽-甲烷重整过程与Ca / Cu化学回路耦合的条件下，商用镍基催化剂的运行极限。通过大量的氧化还原-还原循环来测试重整催化剂的性能。经过100次氧化还原循环后，该催化剂保留了其出色的重整活性。在非常苛刻的条件下：甲烷的转化率值接近热力学平衡：温度在500摄氏度至700摄氏度之间，质量时空速度为8.8 kgCH（4）h（-1）kgcat（-1）。 200次循环后，样品的重整活性降低，这与Ni物种的较低分散性相一致。在氧化还原多循环过程中证实了Ni纳米晶体的烧结。在最佳条件下研究了200次氧化还原循环后与CaO基CO2吸附剂混合后催化剂的性能，该条件是针对与Ca / Cu循环耦合的吸附增强重整过程（温度为650摄氏度，水蒸气/甲烷比） 4，吸附剂/催化剂比为4，空速为0.75 kgCH（4）h（-1）kgcat（-1）。显着地，达到了超过92 vol。％H-2浓度的平衡值，这突出表明该催化剂是工艺开发下一步的有希望的候选者。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of power sources》 |2017年第30期|117-125|共9页
  • 作者

    Navarro M. V.; Lopez J. M.; Garcia T.; Grasa G.; Murillo R.;

  • 作者单位

    Inst Carboquim ICB CSIC, Environm & Energy Dept, C Miguel Luesma Castan 4, Zaragoza 50018, Spain;

    Inst Carboquim ICB CSIC, Environm & Energy Dept, C Miguel Luesma Castan 4, Zaragoza 50018, Spain;

    Inst Carboquim ICB CSIC, Environm & Energy Dept, C Miguel Luesma Castan 4, Zaragoza 50018, Spain;

    Inst Carboquim ICB CSIC, Environm & Energy Dept, C Miguel Luesma Castan 4, Zaragoza 50018, Spain;

    Inst Carboquim ICB CSIC, Environm & Energy Dept, C Miguel Luesma Castan 4, Zaragoza 50018, Spain;

  • 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

    H-2 production; Sorption-enhanced reforming; Steam-methane reforming; Combined calcium-copper cycle;

    机译：H-2生产;吸附强化重整;蒸汽-甲烷重整;钙铜联合循环;

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