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题名: Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming
作者: Dai, Xiaoping; Cheng, Jie; Li, Zhanzhao; Liu, Mengzhao; Ma, Yangde; Zhang, Xin
刊名: CHEMICAL ENGINEERING SCIENCE
出版日期: 2016-10-22
卷号: 153, 页码:236-245
关键词: Chemical-looping methane reforming ; Synthesis gas ; LaFeO3 perovskite ; Oxygen carrier ; Reduction kinetics
DOI: 10.1016/j.ces.2016.07.011
部门归属: 城市与区域生态国家重点实验室
英文摘要: The reduction kinetics of LaFeO3 oxygen carrier for the production of synthesis gas by chemical-looping methane reforming (CLMR) is investigated in the present work. The stoichiometric relationship between oxygen carrier and methane in chemical-looping process is established by temperature programmed surface reaction (TPSR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) characterization. The effects of reduction conditions, namely, gas to solid molar ratio, temperature and sequential redox reaction on the oxygen carrier conversion are investigated. The results from Hancock and Sharp method suggest that the phase boundary control is likely to be dominant. The power law model (PLM), shrinking core model (SCM), as well as nucleation and nuclei growth model (NNGM) are considered to interpret the reduction kinetics of LaFeO3 with methane to synthesis gas. The obtained results show that the 2-D NNGM best describes the experimental data providing parameters with adequate statistical fitting indicators. The model validity is also verified by the data from continuous flow reaction and sequential redox cycles to simulate chemical-looping methane reforming process. The apparent activation energy is estimated and compared with values from the literature data. (C) 2016 Published by Elsevier Ltd.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35649
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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