| 后合成Ti/HMS催化剂的表征及对丙烯的催化环氧化性能研究 |
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| 引用本文： | 金国杰,高焕新,杨洪云,陈璐,丁琳,康陈军,谢在库.后合成Ti/HMS催化剂的表征及对丙烯的催化环氧化性能研究[J].分子催化,2010,24(1). |
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| 作者姓名： | 金国杰 高焕新 杨洪云 陈璐 丁琳 康陈军 谢在库 |
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| 作者单位： | 中国石油化工股份有限责任公司,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)项目(2009CB623505) |
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| 摘 要： | 以正硅酸乙酯为硅源,正十六胺为模板剂,乙醇和水为溶剂,采用水热合成法制备了纯硅HMS介孔材料.以TiCl4为钛源,采用气相接枝技术将Ti物种引入到HMS的骨架中,制得Ti/HMS催化剂;以六甲基二硅氮烷为硅烷化试剂,采用液相接枝技术,将甲基接枝到Ti/HMS催化剂表面,以提高催化剂的疏水性.采用XRD、N2吸附、TEM、UV-Vis和FT-IR等技术表征研究了催化剂的结构、表面化学组成及疏水性;以过氧化氢异丙苯为氧化剂,分别在淤浆床及固定床反应器中,研究了Ti/HMS催化剂对丙烯的催化环氧化性能及稳定性.研究结果表明,所制备的Ti/HMS催化剂具有典型的六方介孔结构特征,且钛物种主要以四配位的活性物种形式存在于骨架中;经硅烷化试剂处理后,催化剂的疏水性得到显著提高;经硅烷化处理后的催化剂对丙烯环氧化具有优异的活性、选择性和稳定性,在2400小时的稳定性实验中,CHP的转化率维持在99.0%以上,环氧丙烷的选择性维持在97.0%以上.
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| 关 键 词： | 含钛HMS催化剂 骨架钛 过氧化氢异丙苯 丙烯环氧化 |
Study on Characterization and Catalytic Performance for Propylene Epoxidation of Ti/HMS Catalyst Prepared by Grafting Technology |
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| JIN Guo-jie,GAO Huan-xin,YANG Hong-yun,CHEN Lu,DING Lin,KANG Chen-jun,XIE Zai-ku.Study on Characterization and Catalytic Performance for Propylene Epoxidation of Ti/HMS Catalyst Prepared by Grafting Technology[J].Journal of Molecular Catalysis (China),2010,24(1). |
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| Authors: | JIN Guo-jie GAO Huan-xin YANG Hong-yun CHEN Lu DING Lin KANG Chen-jun XIE Zai-ku |
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| Institution: | Shanghai Research Institute of Petrochemical Technology;SINOPEC;Shanghai 201208;China |
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| Abstract: | Si-HMS mesoporous material was hydrothermally synthesized with tetraethyl orthosilicate as Si source, 1-hexadecylamine as template, ethanol and water as solvent. Ti speices were incorporated into the framework of Si-HMS with TiCl4 as Ti source by vapor-phase grafting technology; In order to improve the hydrophobicity of Ti/HMS, methyl was grafted on the surface of Ti/HMS with Hexamethyl disilazane as methyl-silicon group agent by liquid-phase technology. The structure, surface chemical component and hydroph... |
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| Keywords: | Titanium-containing HMS catalyst Framework titanium Cumene hydroperoxide Propylene epoxidation |
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