FeZSM-5催化剂上乙苯脱氢反应机理研究——瞬态应答法

Studies on Transient Response for Dehydrogenation of Ethylbenzene over FeZSM-5

采用快速动态法制备了具有MFI结构的硅铁沸石分子筛,研究了该分子筛上乙苯脱氢反应的瞬变行为.结合表面吸附态的红外、顺磁结果发现,苯乙烯通过化学活性吸附的乙苯脱氢形成.通过这个模型可满意地解释瞬态曲线和稳态下的动力学行为.

The transient response for dehydrogenation of ethylbenzene over ferrosilicate catalyst was studied.On the basis of the results of investigation for the surface adsorptive state of ethylbenzene from IR and EPR,the model of the reaction mechanism was given as follows;styrene was produced by dehydrogenation of activation adsorbed ethylbenzene over the catalyst.The model can be used to explain satisfactorily the transient response curves and kinetic behaviour of the reaction.