Effect of Carbon Modification on the Performance of NiO/g-Al2O3 Catalyst for Isobutane Dehydrogenation

Abstract

The catalyst NiO/g-Al₂O₃ was modified with deposited carbon by impregnation of alumina with aqueous solution of Ni(H₂NCH₂CH₂NH₂)x(NO₃)₂ and used in dehydrogenation of isobutane to isobutene in presence of carbon dioxide. The results indicated that the carbon modification can decrease the total acidity of the NiO/g-Al₂O₃ catalyst and it has low acidity and anticoking performance, so it is effective on suppressing the coke formation and side reactions occurrence. Therefore, the catalyst stability and the isobutene selectivity are improved significantly by the carbon modification.