关键词: 乙烷, 催化脱氢, 氧化脱氢, 制备, 催化剂, 活性

Abstract:

Ethylene is one of the important organic chemical raw materials. With the increasing demand of ethylene and the shortage of petroleum resources, ethane dehydrogenation has become an important approach to increase ethylene production. Ethane dehydrogenation to ethylene has received an increasing attention, and the catalysts applied in this process have been improved gradually. In this review, the recent domestic and overseas research advances of ethane dehydrogenation were introduced, and then researches on catalysts for ethane catalytic dehydrogenation and oxidative dehydrogenation were summarized and compared in detail, especially in the aspect of catalyst preparation methods and their catalytic performances. Catalytic dehydrogenation was an effective way to convert light alkanes to the corresponding olefins with a high olefin selectivity. While the high energy consumption was inevitable due to thermodynamic equilibrium limitations. In contrary, with the introduction of oxidants, oxidative dehydrogenation became exothermic, as a result, coke formation was effectively inhibited and energy consumption was highly reduced. However, it was difficult to control deep oxidative reactions, leading to a low ethylene selectivity. Therefore, the development of an appropriate catalyst for catalytic dehydrogenation to improve the single pass conversion of ethane and reduce energy consumption was the key to ethane dehydrogenation.

Key words: ethane, catalytic dehydrogenation, oxidative dehydrogenation, preparation, catalyst, reactivity