Partial oxidation of methane to syngas over Ni/SiC catalysts
Partial oxidation of methane to syngas over Ni/SiC catalysts
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DOI：
10.1016/j.catcom.2004.11.013
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发表时间：
2005-02-01
影响因子：
3.7
通讯作者：
Guo, XY
中科院分区：
文献类型：
--
作者：
Sun, WZ;Jin, GQ;Guo, XY
在固定床石英反应器中研究了Ni/SiC催化剂上甲烷部分氧化制合成气的过程。结果表明，10 wt% Ni/SiC催化剂具有较高的活性和稳定性，且温度较高有利于反应的进行。催化剂失活是由于镍活性位点上的碳沉积造成的。进一步的表征表明，镍颗粒上的沉积物主要由管状碳和非晶碳组成。Ni/SiC催化剂可直接用于反应，无需预先预还原。失活催化剂易于通过在空气中燃烧碳进行再生，再生后的催化剂表现出与新鲜状态相当的催化活性。(C) 2004 Elsevier B.V.版权所有
The partial oxidation of methane into syngas over Ni/SiC catalysts was investigated in a fixed-bed quartz reactor. The results indicated that the 10 wt% Ni/SiC catalyst had high activity and stability, and the high temperature was beneficial to the reaction. The deactivation of the catalysts was due to carbon deposition over nickel active sites. The further characterizations revealed that the deposit over nickel particles was mainly composed of tubular and amorphous carbon. The Ni/SiC catalysts could be directly used in the reaction without beforehand pre-reduction. Moreover the deactivated catalyst was easily regenerated through burning carbon in air, and the regenerated catalyst showed catalytic activity as high as their fresh state. (C) 2004 Elsevier B.V. All rights reserved.