| 摘要: |
| 采用溶液浸渍法制备不同含量A丨203的Co/Si02-Al203催化剂。采用程序升温还原(TPR)、X射线衍射 (XRD)、物理吸附(BET)以及原位C0吸附红外光谱(DRIFT)对催化剂进行表征。结果表明:A1203的添加导致催化 剂比表面积稍有下降,但对孔径分布无明显影响;随着A1203负载量的增加,载体表面钻粒子粒径变小,分散度提高，同时还原度逐步降低;ai2o3改性后催化剂表面C0吸附峰位发生蓝移,并且桥式C0吸附峰强度明显增大，说明 A1203改性后钴催化剂具有更高的表面活性。 |
| 关键词: 费托合成 Co/Si02催化剂 A1203改性 表征 |
| DOI： |
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| 基金项目: |
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| Preparation and configuration of cobalt-based catalyst supported on A1203 modified SiOa for Fischer-Tropsch synthesis |
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SUN Xiao-yu1,2,ZHANG Yi2,BAO Jun3,TSUBAKI Noritatsu2
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(1. Library of China University of Petroleum, Dongying 257061, China ;2. School of Engineering in University of Toyama，Toyarmi 930-8555, Japan;3. National Synchrotron Radiation Laboratory in University of Science and Techmlogy of China, Hefei 230026 ,C/h'tui)
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| Abstract: |
| Co/Si02 -Al203 catalysts were prepared by wetness impregnation method by adjusting the amount of A1203. The properties of various catalysts were characterized by in situ TPR, XRD, N2 physical adsorption, and DRIFT. As shown in results ,the addition of a small amount of Al203 to silica-supported cobalt catalysts decreased BET surface area but the added alumina did not change the pore structure. With the increase of alumina loading, the cobait particle size and the reduction degree decrease, and the dispersion of supported cobalt increases. On the other hand, the addition of A1203 led to the blue shift of the adsorbed CO peak and stronger and broader bridged adsorbed CO peak, which indicates that the addition of A1203 to Co/Si02 catalysts results in higher surface activity. |
| Key words: Fischer-Tropsch synthesis ( FTS) Co/Si02 catalyst Al203 re-charactered characterization |
