| 化学气相沉积法制备Ti/HMS催化剂及甲基接枝改性 |
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| 引用本文： | 李学峰,王宏胜,高焕新,陈庆龄. 化学气相沉积法制备Ti/HMS催化剂及甲基接枝改性[J]. 化学学报, 2009, 67(2): 109-114 |
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| 作者姓名： | 李学峰 王宏胜 高焕新 陈庆龄 |
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| 作者单位： | 许昌学院化学化工学院,许昌,461000;中国石化上海石油化工研究院,上海,201208 |
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| 基金项目： | 国家重点基础研究发展规划(973计划),河南省教育厅自然科学基础研究计划 |
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| 摘 要： | 用化学气相沉积法制备了Ti/HMS介孔分子筛催化剂, 并对其进行甲基接枝改性. 用XRD、N2-吸附、ICP-AES、FTIR, UV-vis和29Si CP/MAS NMR等手段对样品进行了表征, 考察了催化剂的丙烯环氧化性能. 结果表明: 气相沉积法载钛和接枝改性减小了HMS分子筛表面的孔径和比表面, 但是分子筛的介孔特征仍然保持; 随着沉积时间的增加(0.5～2 h), 催化剂的钛含量逐渐增加, 催化活性也随之增加, 但当沉积时间超过2 h后, 钛含量和催化活性均保持不变; 接枝改性后催化剂的环氧化活性和选择性均显著提高; 气相沉积法合成Ti/HMS比水热法合成Ti-HMS具有更高的环氧化催化活性.
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| 关 键 词： | Ti/HMS 催化剂 化学气相沉积 甲基接枝 丙烯环氧化 |
| 收稿时间： | 2008-05-21 |
| 修稿时间： | 2008-09-25 |
Ti/HMS Catalysts Prepared by the Chemical Vapor Deposition Method and Modified by Methyl-grafting |
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| Li Xuefeng,Wang Hongsheng,Gao Huanxin,Chen Qingling. Ti/HMS Catalysts Prepared by the Chemical Vapor Deposition Method and Modified by Methyl-grafting[J]. Acta Chimica Sinica, 2009, 67(2): 109-114 |
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| Authors: | Li Xuefeng Wang Hongsheng Gao Huanxin Chen Qingling |
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| Affiliation: | (a School of Chemistry and Chemical Engineering of Xuchang University, Xuchang 461000) (b Shanghai Research Institute of Petrochemical Technology, Shanghai 201208) |
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| Abstract: | Ti/HMS mesoporous sieve catalysts were prepared by a chemical vapor deposition method (CVD) and modified by methyl-grafting. The catalysts were characterized by XRD, N2-adsorption, ICP-AES, IR, UV-Vis and 29Si CP/MAS NMR, respectively, and evaluated by the epoxidation of propylene. It was revealed that both the mesopore size and surface area of HMS were decreased after the incorporation of titanium and methyl-grafting treatment, but the mesoporous characteristic was still maintained. Both the titanium conte... |
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| Keywords: | Ti/HMS |
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