Ni-WO_3/ZrO_2固体强酸催化剂的制备及催化正庚烷异构化反应性能  

Preparation of Ni-WO_3/ZrO_2 Solid Acid Catalyst and Its Catalytic Performance for n-Heptane Hydroisomerization

作　　者：所艳华[1,2] 李言[2] 陈刚[1] 汪颖军[2] 

机构地区：[1]哈尔滨工业大学化学系,黑龙江哈尔滨150001 [2]东北石油大学化学化工学院,黑龙江大庆163318

出　　处：《石油学报（石油加工）》2013年第6期959-965,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：黑龙江省教育厅科技项目(12521063)资助

摘　　要：采用浸渍法制备了以具有一定晶相结构的ZrO2为载体的Ni-WO3/ZrO2系列固体强酸催化剂。采用XRD、BET、NH3-TPD等方法测定了Ni-WO3/ZrO2系列催化剂的晶相结构和表面酸性,并考察了其在正庚烷异构化反应中的催化性能。结果表明,Ni的引入使得Ni-WO3/ZrO2催化剂由具有单一酸中心催化功能的催化剂变成由酸中心与金属中心共同催化的双功能催化剂,其催化性能显著提高。在n(H2)/n(n-C7H16)=12、MHSV=3.52h-1、m(Cat)=0.3g、反应温度300℃条件下,载体焙烧温度800℃所制备的5%Ni-15%WO3/ZrO2催化剂催化正庚烷异构化反应的转化率可达39.96%,异庚烷的选择性可达94.79%。A series of Ni-WO3/ZrO2 catalysts were prepared by impregnation method. Their crystal structure and acidity were determined by XRD, BET, NH3-TPD . The catalytic performance of the Ni-WO3/ZrO2 samples for the n-heptane isomerization under different conditions was studied. The results showed that the addition of Ni made the Ni-WO3/ZrO2 catalyst with only acid active sites becoming a bi-function catalyst of acid and metal active sites, which had a good catalytic performance for n-heptane hydroisomerization. Under the conditions of n（H2）/n（n-C7H16）=12, MHSV=3.52 h-1, m（Cat）=0.3 g, reaction temperature of 300℃, and with the 5%Ni-15%WO3/ZrO2 as catalyst, whose supporter was calcined at 800℃, the conversion of n-heptane isomerization and its selectivity to i-heptane could reach 39.96% and 94.79%, respectively.

关 键 词：氧化钨 氧化锆 异构化 正庚烷 镍 

分 类 号：O643.36[理学—物理化学]