铝修饰改性对SBA-15分子筛性质及催化剂性能的影响  

Influences of Al modification on the properties and catalytic performance of SBA-15 molecular sieves in hydrocracking

作　　者：代郁[1] 周亚松[1] 魏强[1] 崔勍焱[1] 秦臻[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《燃料化学学报》2013年第12期1502-1506,共5页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划(973计划;2010CB226905)

摘　　要：分别采用调变pH值合成法和后处理嫁接法制备了铝修饰改性的SBA-15分子筛,通过XRD、Al核磁、N2吸附脱附、NH3-TPD等方法对改性分子筛的理化性质进行了分析表征,考察了不同的Al修饰改性方法对分子筛性质和加氢裂化催化剂性能的影响。结果表明,调变pH值合成法能够有效地对SBA-15进行Al改性,得到的Al-SBA-15分子筛具有高度有序的六方孔道结构,较好的水热稳定性。Al的引入提高了SBA-15的表面酸性,并使其在加氢裂化反应中表现出较好的中油选择性。SBA-15 molecular sieves were modified with Al by adjusting pH value and post-grafting synthesis and used as the catalysts for hydrocracking. The newmesoporous materials were characterized by XRD,27Al NMR,N2 adsorption and desorption and NH 3-TPD. The results showed that Al-SBA-15 is successfully obtained through synthesis via adjusting pH value; it exhibits an ordered hexagonal mesoporous structure and well hydrothermal stability. Al modification is able to enhance the amount of surface acid sites of SBA-15,which induces the Al-SBA-15 catalyst with high selectivity to middle distillate for hydrocracking.

关 键 词：调变pH值合成法 Al-SBA-15 酸性 加氢裂化催化剂 

分 类 号：O643[理学—物理化学]