Cu/Ti-MCM-41,Cu/Ti-HMS的制备表征与脱硫性能  

Preparation, Characterization and Desulfurization Performance of Cu/Ti-MCM-41 and Cu/Ti-HMS Catalysts

作　　者：王广建[1] 张金龙[1] 杨志坚[1] 褚衍佩 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《高校化学工程学报》2015年第3期578-584,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21276130)

摘　　要：以水热合成法成功合成了Cu/Ti-MCM-41、Cu/Ti-HMS介孔分子筛,采用XRD、SEM、TEM、FT-IR、BET等手段对分子筛进行了表征。结果表明,合成的分子筛具有良好的晶体结构,Ti已进入分子筛骨架,Cu元素以氧化物Cu O形式存在于分子筛表面并使得分子筛孔道直径分布更集中。用H2O2为氧化剂,合成的Cu/Ti-MCM-41、Cu/Ti-HMS分子筛为催化剂,用于氧化脱硫反应,实验结果表明,Cu O的π键复合配位吸附作用可有效提高Cu/Ti-MCM-41、Cu/Ti-HMS的脱硫性能,脱硫率达到92.8%、88.5%;再生后,分子筛的脱硫率有所下降,表面Cu O的流失和分子筛结构的坍塌是导致Cu/Ti-MCM-41、Cu/Ti-HMS脱硫性能下降的原因。Cu/Ti-MCM-41, Cu/Ti-HMS mesoporous molecular sieves have been successfully synthesizd by hydrothermal synthesis. The samples were characterized by XRD, SEM, TEM, FT-IR, and BET techniques. The results show that the molecular sieve has the favourable crystal structure and Ti is located in framework of the molecular sieve, Cu element in the form of oxide CuO exists in molecular sieves, which makes the distribution of molecular sieve surface channel diameter more concentrated. Cu/Ti-MCM-41 and Cu/Ti-HMS were used as heterogeneous catalyst for the oxidative desulfurization reaction with H2o2 as oxidant, the experimental results show that the complexing coordinate adsorption of the CuO n bond can effectively improve the desulfurization performance of Cu/Ti-MCM-41 and Cu/Ti-HMS and the desulfurization rate can reach 92.8% and 88.5%, respectively. After regeneration, the desulfurization rate of molecular sieves decreases, and both the CuO leaching and molecular sieve structure collapse are the cause of the decrease of sulfur removal by using Cu/Ti-MCM-41, Cu/Ti-HMS as catalysts.

关 键 词：Cu/Ti-MCM-41 Cu/Ti-HMS 合成 表征 脱硫 

分 类 号：TQ424.25[化学工程] TE624.1[石油与天然气工程—油气加工工程]