Abstract

Daifallah Al-Dhayan, Saad Alqahtani and Ahmed Aouissi

DOI : http://dx.doi.org/10.13005/ojc/320535

A series of cerium and iron mixed oxide catalysts were prepared by thermal decomposition of Fe_1.5PMo₁₂O₄₀ and Ce_1.5PMo₁₂O₄₀ heteropolyanions mixture. The prepared catalysts have been characterized and tested for the conversion of isobutane in the presence of CO₂. Characterization by XRD showed that besides Fe₂O₃ and CeO₂, α-MoO₃ was the main phase formed after thermal treatment. The effect of the support, the reaction temperature, and the presence of H₂O in the reactant mixture was investigated. It has been found that the support enhanced both the conversion and isobutene selectivity.  As for the reaction temperature and addition of water, it has been found that increasing the temperature increased both the conversion and isobutene selectivity, whereas the presence of water increased the isobutene selectivity but decreased the conversion.

isobutene; isobutene; polyoxometalates; mixed oxides; carbon dioxide

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