正戊烷异构化催化剂低温酸性改性  

Acid Modification for n-Pentane Isomerization Catalyst at Low Temperature

作　　者：邴国强[1] 王光维[1] 

机构地区：[1]大庆石油学院化学化工学院,黑龙江大庆163318

出　　处：《石油化工高等学校学报》2006年第4期44-46,共3页Journal of Petrochemical Universities

摘　　要：通过酸性改性制备正戊烷异构化低温非贵金属催化剂。结果表明正戊烷异构化遵循典型的双功能催化反应机理。金属含量一定时,通过酸性改性,催化剂活性、选择性均有明显提高,最佳反应温度从300℃降低到250℃。Ni-F/HM催化剂在Ni,F质量分数分别为4%,5%时,反应性能最佳,催化剂比表面积为327.63 m2/g,总孔容为0.238 2 mL/g,平面孔半径为1.088 4 nm。在温度为250℃,压力为2.0 MPa,空速为1.0 h-1,氢烃摩尔比为4∶1,正戊烷转化率为70.49%,异戊烷收率为68.27%,异戊烷选择性为96.85%,液体收率为97.78%。该结果优于目前国内外同类催化剂的应用结果。The non - noble metal catalyst for n - pentane isomerization at low temperature was prepared by acid modification. The results show that n - pentane isomerization conforms to the representatively bifunctional catalytic reaction mechanism, at the condition of same amount metal, activity and selectivity of catalyst are appreciably increased, optimal reaction temperature drops from 300 to 250 ℃ by acid modification. Prepared Ni F/HM catalyst achieves superior reaction activity under the condition that the mass fraction of nickel and fluorine is 4 % and 5 % respectively, the specific surface area of catalyst is 327.63 m2/g, all the specific orifice volume is 0. 238 2 mL/g, plane orifice radius is 1. 088 4 nm. Under the reaction renditions of 250 ℃, 2.0 MPa 1.0 h 1, H2/ hydrocarbon molar ration 4.0, n pentane conversion rate is 70.49 %, isopentane yield is 68.27 %, isopentane selectivity is 96.85 %, liquid yield is 97.78 %, it is superior to the application effect of the same isomerization catalyst at home.

关 键 词：正戊烷 异构化 镍 氟 催化剂 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]