Influence of the oxygen pretreatment on the CO2 reforming of methane on Ni/β-SiC catalyst
Influence of the oxygen pretreatment on the CO2 reforming of methane on Ni/β-SiC catalyst
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DOI：
10.1016/j.cattod.2008.10.019
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发表时间：
2009-03-30
期刊：
影响因子：
5.3
通讯作者：
Pham-Huu, Cuong
中科院分区：
文献类型：
--
作者：
Nguyen, Dinh Lam;Leroi, Pascaline;Pham-Huu, Cuong
采用β-碳化硅挤出物负载镍催化剂，考察了氧气预处理对甲烷二氧化碳重整制合成气反应的影响。用扫描电子显微镜、透射电子显微镜和X射线衍射仪对催化剂的结构和性能进行了表征。用CO2和O-2混合气体对催化剂进行预处理，可显著提高催化剂对CO2重整反应的活性。在负载量为5wt%的Ni5wt%的β-碳化硅催化剂上，经O2处理后的CH4转化率可达90%，而在CO4/CH4混合气体中直接活化的CH4转化率为80%。氧预处理似乎稳定了金属镍相，而不是NiSi2。(C)2008爱思唯尔B.V.保留所有权利。
The influence of the O-2 pretreatment on the CO2 reforming of methane to synthesis gas has been investigated with Ni catalysts supported on beta-SiC extrudate. The structure and properties of the catalysts were characterised by SEM, TEM and XRD techniques. The pretreatment of the catalyst by a mixture of CO2 and O-2 significantly improves the catalytic activity for the CO2 reforming. On the Ni 5 wt.% supported on beta-SiC catalyst, the CH4 conversion has reached 90% with the O-2 pretreatment instead of 80% by direct activation under CO4/CH4 mixture. The oxygen pretreatment seems to stabilize the metallic nickel phase instead of NiSi2. (C) 2008 Elsevier B.V. All rights reserved.