FCC轻汽油C_5和C_6烯烃异构化表观反应动力学的研究  

Isomerization Kinetics of the Olefins in FCC Light Gasoline

作　　者：丁建军[1,2] 黄星亮[1] 

机构地区：[1]中国石油大学(北京)化工学院,北京102249 [2]广东粤电新会发电有限公司,广东江门529149

出　　处：《石油化工》2012年第2期167-171,共5页Petrochemical Technology

摘　　要：采用管式滴流床反应器,在反应压力1.5 MPa、反应温度313～333 K、液态空速15～30 h-1的范围内,对C5和C6烯烃在LNEH-1镍基催化剂上的异构反应进行了研究。实验结果表明,烯烃只发生双键异构和顺反异构,没有发生骨架异构;1-戊烯、3-甲基-1-丁烯、2-甲基-1-丁烯、1-己烯双键异构反应对烯烃浓度的反应级数均为1,异构反应表观活化能分别为27.60,42.24,79.62,27.71 kJ/mol;随烯烃碳数的增加,异构反应阻力增大,同碳数支链烯烃比直链烯烃更难异构化;由实验数据的拟合得到烯烃异构反应动力学方程,1-戊烯转化率的计算值与实验值的相对偏差基本在10%以内,烯烃异构反应动力学方程可用于反应过程模拟和反应器的设计。Isomerization kinetics of C5 and C6 olefins in FCC light gasoline over LNEH-1 Ni-based catalyst was studied in a tubular trickle-bed reactor under the conditions of 1.5 MPa,313-333 K and LHSV 15-30 h-1.The results showed that,there was no skeletal isomerization,only double bond isomerization and cis-trans isomerization occurred under the experimental conditions.All the double-bond isomerization reaction orders of 1-pentene,3-methyl-1-butene,2-methyl-1-butene and 1-hexene over LNEH-1 Ni-based catalyst are 1,which indicates that the isomerization reaction rates are proportional to the concentration of olefins,and the isomerization activation energies are 27.60,42.24,79.62 and 27.71 kJ/mol,respectively.With the increase of carbon number of the olefins,the isomerizations become difficult,and the isomerizations of the branched-chain olefins are more difficult than those of the straight-chain olefins with the same carbon number.The kinetics models were obtained and the error between the calculated and experimental 1-pentene conversions was less than 10%.

关 键 词：流化催化裂化 轻汽油 烯烃异构化 反应动力学 

分 类 号：TQ013.2[化学工程]