Preparation, Structure-Performance Relationship, and Reaction Network of ZnZSM-5 for Oxidative Dehydrogenation of Ethane with CO 2 .

Ethylene (C 2 H 4 ) is a major chemical for the modern society, and new technologies for its production are of strategic importance globally. Recently, oxidative dehydrogenation of ethane (C 2 H 6 ) using CO 2 as a milder oxidant (CO 2 -ODH) is proposed as a potential way for C 2 H 4 production, and development of effective catalysts for the process is drawing wide attention. Here, we report on a facilely prepared ZSM-5 supported Zn system, i. e., ZnZSM-5, which showed great promise in CO 2 -ODH. Samples with different Zn loadings were prepared and evaluated, and the highest performance was obtained over 0.05ZnZSM-5 at 700 °C and a CO 2 :C 2 H 6 feeding ratio of 5 : 1. During 340 min TOS, the C 2 H 6 conversion decreased moderately from 36.2 % to 23.1 %, and the C 2 H 4 yield stabilized at 21.9 % to 27.9 %. Based on systematic characterization and investigation of reaction conditions, the structure-performance relationship and reaction network were discussed in detail.