不同碱源合成Ti-MCM-41及催化氧化-萃取脱除噻吩-高校化学工程学报.PDF

第27 卷第3 期 高 校 化 学 工 程 学 报 No.3 Vol.27 2013 年 6 月 Journal of Chemical Engineering of Chinese Universities June 2013 文章编号：1003-9015(2013)03-0532-06 不同碱源合成Ti-MCM-41 及催化氧化-萃取脱除噻吩 王广建, 张 晋, 郭娜娜, 杨志坚 (青岛科技大学 化工学院, 山东 青岛 266042) 摘 要：分别以NaOH 、氨水、四甲基氢氧化铵为碱源，钛酸四丁酯为钛源，水热法合成了Ti-MCM-41 介孔分子筛， 采用 SEM、XRD 、TEM 、FT-IR 和 BET 等手段对合成分子筛进行了表征分析。研究了晶化时间、碱源、模板剂用量 对结晶度及微观形貌的影响。结果表明：碱源类型对Ti-MCM-41 的晶化过程及其孔道结构存在较大影响，碱源结构越 稳定分子筛长程有序性越好。Ti-MCM-41 对催化氧化噻吩显示出较高的催化活性，以乙腈为萃取剂时其氧化-萃取脱除 率最佳，可达 90.3% 。萃取移除噻吩的效果与溶剂在体系中的结构适应性相关，实验采用溶剂萃取能力的顺序为：腈 类酰胺≥醇类醇胺。 关键词：介孔分子筛；Ti-MCM-41 ；噻吩；催化氧化；模型柴油 中图分类号：TQ426.61 ；O643.36 文献标识码：A DOI ：10.3969/j.issn.1003-9015.2013.03.027 Synthesis of Ti-MCM-41 with Different Alkali Sources and its Catalytic Performance for Oxidation Desulfurization of Thiophene WANG Guang-jian, ZHANG Jin, GUO Na-na, YANG Zhi-jian (Institute of Chemical Engineering, Qingdao University of Science Technology, Qingdao 266042, China) Abstract: Ti-MCM-41 mesoporous molecular sieves were synthesized by hydrothermal synthesis method with ammonia, NaOH, TMAH as alkali source, separately, and were characterized by SEM, XRD, TEM, FT-IR and BET techniques, respectively. The effects of crystallization time, species of alkali sources and template content on the crystallization process and the transformation of microstructures were investigated. The results suggest that the crystallinity and the ordering degree of the pore structural of Ti-MCM-41 are increased with the increase of the structure stability of the alkali source. The catalytic performance of the prepared Ti-MCM-41 in the catalytic oxidati