论文部分内容阅读
依据催化反应色谱理论,在考虑吸附和传递过程影响时,获得一大气压下250℃～290℃范围内钼酸钴催化剂上噻吩氢解反应的吸附平衡常数K_A、吸附速度常数k_a 和反应速度常数k_r,进一步推算出噻吩的吸附热、吸附活化能和表面反应活化能,并与忽略吸附和传递过程影响的结果进行了比较。结果表明,尽管噻吩氢解是以表面反应为控制步骤的,但是吸附和扩散的影响不能忽视。对于使用以吸附平衡为先决条件的Bassett 色谱一级动力学方程是否合适值得研究。用McCoy 提出的准则判别表明,对噻吩氢解反应不能用Eley-Rideal 机理模型近似等价Lang-muir-Hinshelwood 模型。
According to the catalytic reaction chromatographic theory, the adsorption equilibrium constant K_A, the adsorption rate constant k_a and the reaction rate constant k_r of the thiophene hydrogenolysis reaction at cobalt molybdate catalyst in the range of 250 ℃ ~ 290 ℃ were obtained under the influence of adsorption and transfer processes. , Further deduced thiophene adsorption heat, adsorption activation energy and surface activation energy, and ignored the adsorption and transfer process results were compared. The results show that although the thiophene hydrogenolysis is controlled by the surface reaction step, the influence of adsorption and diffusion can not be neglected. The appropriate Bassett chromatographic first-order kinetic equations that are preconditioned for adsorption equilibrium are worth investigating. The criterion discriminated by McCoy suggests that the equivalent Langmuir-Hinshelwood model can not be approximated by the Eley-Rideal mechanism model for thiophene hydrogenolysis reactions.