A systematic DoE approach is developed to optimize Mo-based ZSM-5 catalyst recipe for methane dehydro-aromatization process. Aim is to achieve maximum benzene productivity with improve catalyst stability. Three major factors - Si/Al ratio of ZSM-5, pH of Mo incorporation and catalyst activation along with two different responses - benzene yield and final/peak methane conversion (or in other words the extent of catalyst stability) were considered for constructing the DoE. The benzene yield and final/peak methane conversion vary significantly depending on the catalyst recipe including the catalyst activation protocol/conditions. The combination of Si/Al ratio of 15, pH of Mo incorporation 10 and control catalyst activation by pre-carburization identified through DoE helped to achieve maximum/optimum benzene yield and the catalyst stability. Moderate acidity of zeolite, high Mo dispersion and presence of higher quantity of catalytically active Mo-carbide/oxycarbide species seems to be the reason for high benzene productivity and catalyst stability.

开发了一种系统的 DoE 方法来优化用于甲烷脱氢芳构化过程的 Mo 基 ZSM-5 催化剂配方。目的是在提高催化剂稳定性的同时实现最大的苯生产率。三个主要因素——ZSM-5 的 Si/Al 比、Mo 掺入的 pH 值和催化剂活化以及两种不同的反应——苯产率和最终/峰值甲烷转化率（或换句话说，催化剂稳定性的程度）被考虑用于构建能源部。苯产率和最终/峰值甲烷转化率因催化剂配方包括催化剂活化协议/条件而异。Si/Al 比为 15、Mo 掺入的 pH 值为 10 以及通过 DoE 确定的预渗碳控制催化剂活化的组合有助于实现最大/最佳苯产率和催化剂稳定性。