高等学校化学学报Issue(6)：1252-1257,6.DOI:10.7503/cjcu20140075
Ce 促进 Ni/SAPO-11催化剂上正庚烷的临氢异构化
Ni/SAPO-11 Promoted by Rare Earth Element Ce for Hydroisomerization of n-Heptane
摘要
Abstract
The monometallic catalyst Ni/ SAPO-11 was prepared via the impregnation method. Then, the bi-metallic catalyst Ni-Ce / SAPO-11 was prepared via the sequential impregnation method. The crystal structure and acidity of these two catalysts were determined by X-ray powder diffraction, Brunauer-Emmett-Teller (BET) methods and temperature-programmed desorption of ammonia. With addition of Ce, the BET surface areas and porous volume of Ni/ SAPO-11 and total acidity were increased, and the acid strength was de-creased. Introduction of Ce improved the dispersion of Ni on the surface of SAPO-11. Addition of Ce could improve the selectivity of the hydroisomerization of n-heptane considerably. Under the conditions of n(H2 ) /n(n-C7 H16 )= 12, weight hourly space velocity =3. 52 h-1 , catalyst weight=0. 3 g, and the reaction tempera-ture of 300 ℃, the conversion of n-heptane could reach 25. 4% and the isomerization selectivity to i-heptane could reach 90. 4% .关键词
SAPO-11 分子筛/Ni-Ce / SAPO-11 催化剂/铈/镍/正庚烷/异构化Key words
SAPO-11 molecular sieve/Ni-Ce / SAPO-11 catalyst/Cerium/Nickel/n-Heptane/Isomerization分类
化学化工引用本文复制引用
所艳华,李秀敏,陈刚,崔莹雪,孙羽佳,汪颖军..Ce 促进 Ni/SAPO-11催化剂上正庚烷的临氢异构化[J].高等学校化学学报,2014,(6):1252-1257,6.基金项目
黑龙江省教育厅科技项目(批准号:12521063)资助. Supported by the Scientific Research Fund of Heilongjiang Provincial Education Department, China(No.12521063) （批准号:12521063）
