MCM-41-HY复合分子筛的合成及其在深度加氢脱硫中的应用  

Synthesis of MCM-41-HY Composite Molecular Sieves and Their Application to Deep Hydrodesulfurization

作　　者：任靖[1] 王安杰[1] 李翔[1] 曹光伟[1] 鲁墨弘[1] 胡永康[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室

出　　处：《高等学校化学学报》2006年第12期2353-2356,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20333030和20503003)资助.

摘　　要：在水热条件下合成了包覆型MCM-41-HY复合分子筛.采用XRD、N2气吸附和SEM等方法对其进行了表征.结果表明,MCM-41-HY复合分子筛和MCM-41与H型Y沸石(HY)的机械混合物明显不同,在复合分子筛MCM-41-HY中,中孔相MCM-41附晶生长在HY沸石上,将HY包覆起来.以二苯并噻吩为模型化合物,考察了该材料担载NiMo催化剂的加氢脱硫活性.结果表明,MCM-41-HY复合分子筛与MCM-41和HY的机械混合物担载NiMo催化剂的加氢脱硫(HDS)活性相当,但MCM-41-HY复合分子筛担载NiMo催化剂的裂化活性较低.其裂化活性不同的原因在于其载体孔道结构和酸性位的分布不同.MCM-41-HY composite molecular sieves were synthesized hydrothermally, and characterized by means of XRD, N2 adsorption and SEM. A comparison was made between the mechanical mixture of MCM-41 and HY, and the synthesized MCM-41-HY composite molecular sieves as the hydrodesulfurization（HDS） catalyst support. Both exhibit excellent activities in the HDS hydrodesulfurization of dibenzothiophene, but, the composite shows a much lower hydrocracking activity than the mechanical mixture. It is proposed that the lower hydrocracking activity of MCM-41-HY composite molecular sieves may be attributed to the bimodal structure in which HY zeolite is wrapped by the mesoporous MCM-41.

关 键 词：复合分子筛 MCM-41 合成 加氯脱硫 HY沸石 

分 类 号：O643.38[理学—物理化学] TE624.9[理学—化学]