Thermally Impregnated Ni−Olivine Catalysts for Tar Removal by Steam Reforming in Biomass Gasifiers
Thermally Impregnated Ni−Olivine Catalysts for Tar Removal by Steam Reforming in Biomass Gasifiers
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DOI：
10.1021/ie071089l
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发表时间：
2008-01
影响因子：
4.2
通讯作者：
Zhongkui Zhao;J. Kuhn;L. Felix;R. B. Slimane;and Chun W. Choi;U. Ozkan
中科院分区：
文献类型：
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作者：
Zhongkui Zhao;J. Kuhn;L. Felix;R. B. Slimane;and Chun W. Choi;U. Ozkan
开发了一种新颖且潜在经济的制备技术，热浸渍（TI），以将催化活性材料（即，Ni）在橄榄石上。该方法允许合成耐磨损的镍橄榄石催化剂。对通过TI和传统的初湿浸渍（IWI）制备的Ni−橄榄石催化剂以及不含Ni的橄榄石进行了比较研究。采用BET比表面积分析、程序升温反应/氧化/还原、XRD和XPS等表征技术对催化剂进行了表征。由TI制备的Ni−橄榄石催化剂与橄榄石载体相比表现出更高的活性和“焦炭选择性”，表明Ni是增强活性所必需的。此外，与IWI制备的类似配方相比，TI制备的Ni−橄榄石催化剂显示出相似的高温活性和降低的焦炭沉积速率。Ni与橄榄石之间的相互作用增强，有利于Ti催化剂的形成。
A novel and potentially economic preparation technique, thermally impregnation (TI), was developed to incorporate catalytic active materials (i.e., Ni) onto olivine. The approach allows for the synthesis of attrition-resistant Ni−olivine catalysts. Comparative studies were performed over Ni−olivine catalysts prepared by TI and traditional incipient wetness impregnation (IWI), as well as olivine without Ni. Various characterization techniques such as BET surface area analysis, temperature-programmed reaction/oxidation/reduction, XRD, and XPS were performed to examine the catalysts. The Ni−olivine catalyst prepared by TI demonstrated improved activity and “coke selectivity” compared to the olivine support, indicating that Ni is necessary for enhanced activity. Additionally, the Ni−olivine catalyst prepared by TI showed similar high-temperature activity and decreased coke deposition rates compared to similar formulations prepared by IWI. Stronger interactions between Ni and the olivine support for the TI cat...