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四氢萘在Ni Mo/Al_2O_3、Fe_2O_3、FeS_2上常压脱氢是典型的连串可逆反应,1,2-二氢萘及微量的1,4-二氢萘是反应的中间产物.脱氢反应速度随四氢萘分压提高和氢分压下降而提高.对二氢萘反应性能的考察表明它具有比四氢萘和萘高得多的反应活性,能迅速地催化转化为萘和四氢萘.氢加快二氢萘的加氢是它阻滞四氢萘脱氢的主要原因.各种催化剂对四氢萘脱氢、二氢萘转化和萘高压加氢都具有基本相同的活性顺序.根据可逆连串表面反应的历程及表面吸附的二氢萘为非常活泼的反应中间体的假设,作者推导了动力学模型,计算得到各反应物在Ni Mo/Al_2O_3、Fe_2O_3、Fe_2O_3/Al_2O_3上表面吸附常数和表面反应速率常数,并进行模拟计算.理论计算与实验能很好地吻合,证明了模型的合理性.模型及参数也进一步解释了一些实验事实.
Atmospheric pressure dehydrogenation of tetralin on Ni Mo / Al_2O_3, Fe_2O_3 and FeS_2 is a typical series of reversible reactions, and 1,2-dihydronaphthalene and trace amount of 1,4-dihydronaphthalene are the intermediates of the reaction. The reaction rate increased with the increase of partial pressure of tetralin and the decrease of partial pressure of hydrogen.The investigation of the reaction performance of dihydronaphthalene showed that it had a much higher reactivity than that of tetralin and naphthalene and could be catalytically converted to naphthalene and tetrakis Hydrogen naphthalene Hydrogenation of dihydronaphthalene is the main reason for its retardation of dehydrogenation of tetrahydronaphthalene.A variety of catalysts have basically the same order of activity for tetralin dehydrogenation, dihydronaphthalene conversion and naphthalene high pressure hydrogenation According to the history of reversible continuous surface reaction and the assumption that dihydronaphthalene is adsorbed on the surface, which is a very reactive intermediate, the authors deduced the kinetic model and calculated the molar ratio of reactants to Ni Mo / Al 2 O 3, Fe 2 O 3, Fe 2 O 3 / Al 2 O 3 Surface adsorption constant and surface reaction rate constant, and the simulation calculation is carried out.The theoretical calculation and experiment can well fit and prove the rationality of the model.The model and the parameters also further explain some experimental facts.