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OALib Journal期刊
ISSN: 2333-9721
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TiOx(x<2)表面修饰Ni/TiO2-SiO2催化顺酐液相选择加氢合成γ-丁内酯
DOI: 10.3724/SP.J.1088.2011.10709, PP. 1768-1774
Keywords: 镍,氧化钛,氧化硅,负载型催化剂,顺酐,选择加氢,丁内酯
Abstract:
？以TiO2-SiO2复合氧化物气凝胶为载体,制备了一系列Ni/TiO2-SiO2催化剂,并采用N2物理吸附-脱附、H2程序升温还原/脱附、X射线衍射及原位漫反射傅里叶变换红外光谱等技术对催化剂进行了表征,考察了载体中钛含量对催化剂结构、表面性质及其催化顺酐液相选择加氢合成γ-丁内酯反应性能的影响.结果表明,较小的Ni0晶粒有利于γ-丁内酯的生成.在催化剂活性组分的还原过程中,随着载体中钛含量的增加,越来越多的TiO2被还原为TiOx(x<2)物种.Ni0晶粒和TiOx物种的协同作用影响了催化剂的羰基加氢性能;当较小的Ni0晶粒匹配合适的TiOx物种时,催化剂表现出较高的羰基加氢活性.
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