Coupling dehydrogenation of isobutane in the presence of carbon dioxide over chromium oxide supported on active carbon

Abstract

The dehydrogenation of isobutane (IB) to produce isobutene coupled with reverse water gas shift in the presence of carbon dioxide was investigated over the catalyst Cr 2O 3 supported on active carbon (Cr 2O 3/AC). The results illustrated that isobutane conversion and isobutene yield can be enhanced through the reaction coupling in the presence of carbon dioxide. Moreover, carbon dioxide can partially eliminate carbonaceous deposition on the catalyst and keep the active phase (Cr 2O 3), which are then helpful to alleviate the catalyst deactivation.