Shape selective catalysis of Ni modified SAPO-11 molecular sieve for alkylation of 2-methylnaphthalene to 2,6-dimethylnaphthalene

摘要：
采用水热法以nAl_(2O3)∶nDPA(二正丙胺)∶nP_(2O5)∶nSiO_(2)∶nH_(2O)=10∶10∶10∶0.2∶43制备了SAPO-11分子筛,使用等体积浸渍法负载金属Ni改性SAPO-11分子筛.通过XRD,SEM,N2吸附-脱附和NH3-TPD对SAPO-11分子筛催化剂进行了理化性质的表征.在400℃,3.5 MPa,2-甲基萘(2-MN)重时空速(WHSV)为0.5 h~(-1)的条件下,考察了负载Ni不同量的SAPO-11分子筛催化剂的烷基化活性.结果表明,2%Ni/SAPO-11分子筛催化剂具有最高的选择性及2,6-/2,7-DMN比(即2,6-二甲基萘(2,6-DMN)和2,7-二甲基萘(2,7-DMN)的物质的量之比),反应7 h后,分别可以达到46%和2.04.SAPO-11分子筛有高活性与其具有适中的孔径和温和的酸强度密不可分.

The SAPO-11 molecular sieve with n Al2O3∶n DPA∶n P2O5∶n SiO2∶n H2O=10∶10∶10∶0.2∶43 was prepared by hydrothermal method,and then the SAPO-11 molecular sieve was modified with Ni,loaded by impregnation method.The samples were examined by XRD,SEM,N 2 adsorption-desorption and NH3-TPD to characterize physical and chemical properties of SAPO-11 molecular sieve catalyst.Under the conditions of 400℃,3.5 MPa,and 2-methylnaphthalene(2-MN)weight hourly space velocity(WHSV)of 0.5 h-1,the alkylation activities of catalysts were investigated.The results show that the 2%Ni/SAPO-11 molecular sieve catalyst has the best selectivity and the 2,6-/2,7-DMN ratio(molar ratio of 2,6-DMN and 2,7-DMN),which can reach 46%and 2.04,respectively.The high activity of SAPO-11 molecular sieve could be attributed to its moderate pore size and mild acidity.

作者：
冯刚 文志辉 周建林 邵松 刘清华 张荣斌

Feng Gang;Wen Zhihui;Zhou Jianlin;Shao Song;Liu Qinghua;Zhang Rongbin(College of Chemistry,Nanchang University,Nanchang 330031,China)

机构地区：
南昌大学化学学院

出处：

《betway官方app 学报：自然科学版》 CAS 北大核心 2022年第4期20-27,F0002,共9页

Journal of Henan Normal University(Natural Science Edition)

基金：
国家自然科学基金(21875096)。

关键词：
2 6-二甲基萘 SAPO-11分子筛 烷基化 择形催化

2,6-dimethylnaphthalene SAPO-11 molecular sieve alkylation shape-selective catalysis

分类号：
TQ241.5 [化学工程—有机化工]

Ni改性SAPO-11分子筛择形催化2-甲基萘烷基化制2,6-二甲基萘.pdf