Titanium-Promoted Rh-Mn-Li/SiO_(2) for C_(2)-Oxygenates Synthesis from Syngas: Effect of Low Titanium Loading

查看全文 作　　者：Weimiao Chen Yunjie Ding Dahao Jiang Zhendong Pan Hongyuan [1]Luo

机构地区：[1]Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

出　　处：《Journal of Natural Gas Chemistry》索引2005年第14卷第4期,共8页

基　　金：Financial support by the Chinese Science and Technology Ministry(Grant No.G1999022404)for the present work is gratefully acknowledged. 摘　　要：Addition of small amounts of Ti oxide to Rh-Mn-Li/SiO2 catalysts unexpectedly results in an increase in their activity for C2-oxygenates production from syngas. Continuously increasing Ti loading depresses catalyst activity. The effect of Ti at low level on the catalytic properties in the CO/H2 reaction has been studied by various techniques. The characterization results indicate that the existence of Ti species has no effect on the ability of Rh to dissociate CO molecules and on the Rh dispersion. On the other hand, it is shown that trace amount of Ti strengthens the adsorption of CO and increases the amount of strongly adsorbed CO that can be hydrogenated and therefore improves the activity. The Rh- Mn interaction intensity, which can be regulated by Ti doping, seems to be the main reason to achieve higher yield of the desired reaction products. 关键词：合成气钛 CO氢化作用 C2氧化处理 Rh-Mn-Li/SiO2

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Titanium-Promoted Rh-Mn-Li/SiO_(2) for C_(2)-Oxygenates Synthesis from Syngas: Effect of Low Titanium Loading

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