DESIDROGENAÇÃO CATALÍTICA OXIDATIVA DO ETANO UTILIZANDO CO2: UMA MINI REVISÃO

Abstract

As a consequence of the greenhouse effect, there is a growing concern worldwide to reduce the amount of atmospheric carbon dioxide and a continuous effort by the scientific community to expand its use in various applications. Recently, CO2 has been used as an alternative, being applied as a light oxidant in the ethane oxidative dehydrogenation reaction, enabling new routes to obtain ethylene that are more efficient and economical than the current ones. Thus, the oxidative dehydrogenation of ethane with carbon dioxide stands out as one of the most promising alternatives, as it is an economical and ecological process, consuming one of the greenhouse gases. To analyze the literature on the relevance of the catalytic oxidative dehydrogenation reaction of ethane as an alternative route to ethylene production. This is a bibliographic review that used as source the databases of ELSEVIER, SPRINGER and CAPES from the descriptors "ODHE", "Oxidative catalytic dehydrogenation with CO2" and "ethene". Using the inclusion criteria, 50 articles in English and Portuguese published from 2012 to 2023 and a technical book were analyzed. CO2 is a promising alternative for the oxidative dehydrogenation reaction of ethane with O2, which suffers from catalyst deactivation due to coke formation and reducing selectivity to the main product. From the use of CO2 as an oxidant in the reaction, we have the advantage of producing active oxygen species, reducing coking and increasing selectivity. However, the great challenge is the development of catalysts that are active and selective to ethylene, with nickel oxide and cerium oxide emerging as promising alternatives, with high catalytic activity and favoring the redox cycle.