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首页> 外文期刊>Environmental Science & Technology >Oxidative CO_2 Reforming of Methane in La_(0.6)Sr_(0.4)Co_(0.8)Ga_(0.2)O_(3-δ) (LSCG) Hollow Fiber Membrane Reactor
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Oxidative CO_2 Reforming of Methane in La_(0.6)Sr_(0.4)Co_(0.8)Ga_(0.2)O_(3-δ) (LSCG) Hollow Fiber Membrane Reactor

机译：La_（0.6）Sr_（0.4）Co_（0.8）Ga_（0.2）O_（3-δ）（LSCG）中空纤维膜反应器中甲烷的氧化CO_2重整

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摘要

CO_2 utilization in catalytic membrane reactors for syngas production is an environmentally benign solution to counter the escalating global CO_2 concerns. In this study, integration of a La_(0.6)Sr_(0.4)Co_(0.8)Ga_(0.2)O_(3-δ) (LSCG) hollow fiber membrane reactor with Ni/LaAlO_3-Al_2O_3 catalyst for the oxidative CO_2 reforming of methane (OCRM) reaction was successfully tested for 160 h of reaction. High CH_4 and CO_2 conversions of ca. 94% and 73% were obtained with O_2 flux ca. 1 mL·min~(-1)·cm~(-2) at 725 ℃ for the 160-h stability test. Surface temperature programmed desorption studies of the membrane were conducted with H_2, CO, and CO_2 as probe gases to facilitate understanding on the effect of H_2 and CO product gases as well as CO_2 reactant gases on the membrane surface. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) analysis of the postreacted membrane after 160-h stability tests suggests Sr-enriched phases with the presence of adsorbed carbonate and hydrogenated carbon. This shows the subsequent reactant spillover on the membrane surface from the catalyst bed took place due to the reaction occurring on the catalyst. However, XRD analysis of the bulk structure does not show any phase impurities, thus confirming the structural integrity of the LSCG hollow fiber membrane.
机译：在催化膜反应器中利用CO_2生产合成气是一种有益于环境的解决方案，可应对全球不断增长的CO_2问题。在这项研究中，La_（0.6）Sr_（0.4）Co_（0.8）Ga_（0.2）O_（3-δ）（LSCG）中空纤维膜反应器与Ni / LaAlO_3-Al_2O_3催化剂的集成用于甲烷的氧化CO_2重整（OCRM）反应已成功测试160小时。大约CH_4和CO_2的高转化率。大约有O_2的助焊剂得到94％和73％的氧。 160 h稳定性试验在725℃下为1 mL·min〜（-1）·cm〜（-2）。使用H_2，CO和CO_2作为探针气体进行膜的表面温度程序解吸研究，以促进对H_2和CO产物气体以及CO_2反应物气体在膜表面上的影响的了解。经过160小时的稳定性测试后，对后反应膜的扫描电子显微镜-能量色散X射线（SEM-EDX），X射线光电子能谱（XPS）和傅里叶变换红外（FTIR）分析表明存在Sr富集相吸附的碳酸盐和氢化碳。这表明由于反应在催化剂上发生，随后反应物从催化剂床溢出到膜表面上。然而，本体结构的XRD分析没有显示任何相杂质，因此证实了LSCG中空纤维膜的结构完整性。

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  • 来源
    《Environmental Science & Technology》 |2013年第24期|14510-14517|共8页
  • 作者

    Yasotha Kathiraser; Zhigang Wang; Sibudjing Kawi;

  • 作者单位

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576;

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576;

  • 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);美国《化学文摘》(CA);
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