Density functional theory calculation of propane cracking mechanism over chromium (III) oxide by cluster approach

Journal of the Serbian Chemical Society

Oyegoke Toyese¹  Dabai Nyako Fadimatu²  Jibril El-Yakubu Baba²  Uzairu Adamu³ 

[1] Chemical Engineering Department, Faculty of Engineering, ABU Zaria, Nigeria + Laboratoire de Chimie, ENS Lyon, l`Universite de Lyon, Lyon, France;Chemical Engineering Department, Faculty of Engineering, ABU Zaria, Nigeria;Chemistry Department, Faculty of Physical Sciences, ABU Zaria, Nigeria;

关键词: catalyst deactivation;    olefins;    rate-determining step;    scission;    first principle;    coking;   

DOI  :  10.2298/JSC200521044O

来源: DOAJ

【 摘 要 】

The catalyst coking and production of undesired products during the transformation of propane into propylene have been the critical challenges in the on purpose approach of propylene production. The mechanism contributing to this challenge was theoretically investigated through the analysis of cracking reaction routes. The study carried out employed the use of a density functional theory and cluster approach in order to understand the reactions that promote coking of the catalyst and in the search for the kinetic and thermodynamic data of the reaction mechanism involved in the process over Cr2O3. The ratedetermining step and feasible route that easily promote the production of small hydrocarbons like ethylene, methane, and many others were identified. The study suggests Cr-site substitution or co-feeding of oxygen can aid in preventing deep dehydrogenation in the conversion of propane to propylene. This information will help in improving the Cr2O3 catalyst performance and further increase the production yield.

【 授权许可】

Unknown