SAPO-31分子筛的合成及其催化正癸烷加氢异构化反应性能  

SYNTHESIS OF SAPO-31 AND ITS CATALYTIC PERFORMANCE IN HYDROISOMERIZATION OF n-DECANE

作　　者：吴伟[1] 杨巍[1] 肖林飞[1] 杨杰[1] 刘丹[1] 李鹏[1] 基赫佳宁O.V. 托克塔列夫A.V. 伊切夫斯基G.V. 

机构地区：[1]黑龙江大学功能无机材料化学省部共建教育部重点实验室,中俄联合催化实验室,黑龙江哈尔滨150080 [2]俄罗斯科学院西伯利亚分院鲍列斯科夫催化研究院,新西伯利亚市630090

出　　处：《石油学报（石油加工）》2009年第A02期87-90,105,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中俄政府间国际合作项目(CR12-43);科技部国际科技合作项目(2008DFR40400)

摘　　要：分别以异丙醇铝、硅气溶胶、磷酸为铝源、硅源和磷源,二正丁胺为模板剂,采用水热法合成了具有不同Si含量的纯相SAPO-31分子筛,并采用XRD、BET、SEM、NH3-TPD等手段对其结构和酸性进行了表征。再采用浸渍法制备了0.5%Pd/SAPO-31双功能催化剂,并在连续微型固定床反应装置上考察了其对正癸烷加氢异构化反应的催化性能,考察了SAPO-31分子筛的Si含量对其晶貌、孔结构特性、酸性和催化性能的影响规律。结果表明,随着SAPO-31分子筛酸性位的增加,Pd/SAPO-31催化剂上正癸烷的转化率提高,异构体中单甲基壬烷的选择性下降,在0.5%Pd/SAPO-31(n(SiO2)/n(Al2O3)=0.5)催化剂上正癸烷异构化产率达到最大值。A series of SAPO-31 molecular sieves with different silicon contents was synthesized under hydrothermal conditions using AIP, fumed silica, HaPO4 and DBA as sources of Al, Si, P and template, respectively. SAPO-31 samples synthesized at different silicon contents were characterized using XRD, BET, SEM and NHa-TPD. The bifunctional catalysts 0.5%Pd/SAPO-31 were prepared through the incipient wetness impregnation technique, and its catalytic performance of the hydroisomerization of n-decane was investigated on the fixed-bed continuous-flow reactor. The influence of silicon contents on the crystal morphologies, pore structures, acidic properties and catalytic performance of SAPO-31 samples was studied. The results indicated that gave rise to SAPO-31 molecular sieves with different acidities, conversion of n-decane increased but selectivity to mono-methylnonane isomers decreased. The maximal selectivity to iso-Clo was reached over 0.5 % Pd/SAPO-31 （n （SiO2）/n （Al2 O3 ） = 0.5）.

关 键 词：SAPO-31分子筛 二正丁胺 双功能催化剂 正癸烷 加氢异构化 

分 类 号：TQ223.24[化学工程—有机化工] O643.36[理学—物理化学]