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采用水热合成法,将未焙烧的介孔材料SBA-15作为硅源合成介孔SAPO-11分子筛。利用X射线衍射、N2吸附-脱附等温曲线,BET物理吸附,NH3-TPD以及扫描电子显微镜等对分子筛的形貌和孔结构性质进行表征。将正十二烷作为原料,考察负载量为0.5%的Pt/SAPO-11分子筛催化剂的加氢异构化反应催化性能。结果表明:以未焙烧的SBA-15作为硅源制备介孔SAPO-11分子筛,介孔比表面积为77.2 m2/g以及介孔孔容为0.261 m3/g,有效降低孔道传质阻力,酸量显著增加,活性位增多,使长链烷烃加氢异构化的选择性达到65.21%。
Abstract：The hierarchical SAPO-11 molecular sieves were synthesized by a hydrothermal method with mesoporous material SBA-15 as a silica source. The morphology and the pore structure of zeolites were characterized by X-ray diffraction and N2 adsorption-desorption isothermal analysis, specific surface area measurement, NH3-TPD and scanning electron microscopy respectively. The catalyst loading of hydroisomerization catalytic performance of Pt/SAPO-11 molecular sieve prepared with dodecane is 0.5%. The result shows that the uncalcined SBA-15 can be used as a silica source for the synthesis of mesoporous SAPO-11 molecular sieve with the mesoporous specific surface area of 77.2 m2/g and the mesoporous volume of 0.261 m3/g. This sieve can effectively reduce the pore mass transfer resistance, and increase the number of active sites, and the selectivity of long chain alkanes hydroisomerization reaches 65.21%.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2018.10.15
中图分类号:O643.36
引用信息:
[1]吴海琳,孙娜,王海彦,等.间接模板剂法合成介孔SAPO-11分子筛及其加氢异构化性能[J].硅酸盐学报,2018,46(10):1447-1452.DOI:10.14062/j.issn.0454-5648.2018.10.15.
基金信息:
国家自然科学基金项目(2016-Z0030)
2018-07-26
2018-07-26
2018-07-26