| 铯添加对VOx/SBA-15催化剂丙烷氧化脱氢性能影响 |
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| 引用本文： | 郭建平,伊晓东,吴钟芳,华卫琦,黄传敬,翁维正. 铯添加对VOx/SBA-15催化剂丙烷氧化脱氢性能影响[J]. 分子催化, 2011, 25(5): 415-420 |
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| 作者姓名： | 郭建平 伊晓东 吴钟芳 华卫琦 黄传敬 翁维正 |
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| 作者单位： | 1. 厦门大学固体表面物理化学国家重点实验室醇醚酯化工清洁生产国家工程实验室化学化工学院化学系,福建厦门,361005
2. 烟台万华聚氨酯股份有限公司,山东烟台,264002 |
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| 基金项目： | 国家重点基础研究发展规划项目(2010CB732300); 国家自然科学基金(20803060,21073148); 福建省重大科技专项(2009HZ0002-1); 烟台万华聚氨酯股份有限公司科技经费资助 |
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| 摘 要： | 我们考察了碱金属铯的添加对具有单一活性中心（分立的VOx四面体）的VOx／SBA-15催化剂上丙烷氧化脱氢反应性能的影响，发现铯的加入可以显著改善丙烯的选择性．在相同的丙烷转化率时，丙烯选择性提高了约10％．对催化剂的X射线衍射，拉曼光谱，程序升温还原，吡啶吸附IR光谱和程序升温脱附表征结果表明，少量碱金属的加入，并未改变活性中心的结构及其可还原性能，但明显降低了催化剂表面酸量，尤其是B酸量，从而有利于产物丙烯的脱附，抑制了深度氧化产物COx的产生，提高了丙烯的选择性．
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| 关 键 词： | 丙烷 氧化脱氢 负载型钒基催化剂 SBA-15 铯 |
| 收稿时间： | 2011-09-21 |
| 修稿时间： | 2011-09-21 |
Effect of cesium loading on catalytic activity of VOx/SBA-15 catalysts for propane oxidative dehydrogenation |
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| GUO Jian-ping,YI Xiao-dong,WU Zhong-fang,HUA Wei-qi,HUANG Chuan-jing,WENG Wei-zheng,WAN Hui-lin. Effect of cesium loading on catalytic activity of VOx/SBA-15 catalysts for propane oxidative dehydrogenation[J]. Journal of Molecular Catalysis (China), 2011, 25(5): 415-420 |
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| Authors: | GUO Jian-ping YI Xiao-dong WU Zhong-fang HUA Wei-qi HUANG Chuan-jing WENG Wei-zheng WAN Hui-lin |
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| Affiliation: | GUO Jian-ping1,YI Xiao-dong1,WU Zhong-fang1,HUA Wei-qi2,HUANG Chuan-jing1,WENG Wei-zheng1,WAN Hui-lin1(1.State Key Laboratory of Physical Chemistry of Solid Surfaces,National Engineering Laboratory for Green Chemical Productions of Alcohols,Ethers and Esters and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China,2.Yantai Wanhua Polyurethanes Co.,Ltd.,Yantai,264002,China) |
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| Abstract: | The effect of cesium loading on the performance of single-site(pseudotetrahedral monovanadate VO4)VOx/SBA-15 catalysts for propane oxidative dehydrogenation was investigated.The addition of Ce significantly improved the selectivity of propene which was enhanced by about 10% at the same propane conversions.The catalysts were characterized by XRD,Raman,H2-TPR,NH3-TPD and FT-IR spectroscopy of pyridine adsorption.The results indicated that the addition of a small amount of cesium did not change the structure a... |
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| Keywords: | propane oxidative dehydrogenation vanadia catalylsts SBA-15 cesium |
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