摘要
用拉普拉斯变换等数学处理方法,由连续方程推导出了反应组分皆为弱吸附时。在脉冲催化反应的真实条件下,反应组分的吸附系数表达式。并用该理论系统地考察了在实际反应条件下,环己烷在Pt-Al_2O_3上脱氢中环己烷、苯和氢的吸附系数,求得了相应的吸附热。同时还由脉冲反应的表观速度常数和所求得的环己烷吸附系数进一步求得了表面反应动力学参数。此外,对氢、环己烷和苯的吸附态物种进行了讨论,认为不同的吸附态物种是被吸附在催化剂表面上的不同类的活性中心上。
A formula of reactant adsorption coefficients,see Eq.(16),under real conditions in
pulse reaction has been derived from continuous equation by means of Laplace transfor-
mation and other methods.Adsorption coefficients of cyclohexane ,benzene and hydrogen
under reaction conditions were determined by this formula during dehydrogenation of cy-
clohexane on Pt/Al_2O_3,from which corresponding adsorption heats were obtained
futher.Kinetic parameters of surface reaction in dehydrogenation of cyclohexane were al-
so obtained from the apparent rate constant and adsorption coefficients.According to the
obtained adsorption coefficients it is suggested that three types of hydrogen adsorption
species and two types of benzene and cyclohexane adsorption species exist on the cata-
lyst surface,which are adsorbed on different kinds of active sites.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1993年第2期19-25,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
