فهرست نشریات علمی دسترسی آزاد ایران

The reverse water gas shift reaction over the prepared tungsten carbide alloy (WC/AC) from date palm fronds catalyst was studied by CO 2 hydrogenation, temperature-programmed reduction of the WC/AC catalyst. In comparison to the reaction of CO 2 alone, hydrogen can significantly promote the CO formation in the RWGS reaction. The formate derived from association of H 2 and CO 2 is proposed to be the key intermediate for CO production. Formate dissociation mechanism is the major reaction route for CO production. The reverse water gas shift (RWGS) reaction over WC/AC with potassium (K) promoter was studied by means of CO 2 hydrogenation at temperature programmed. The main role of Potassium oxide (K 2 O) was to provide catalytic activity for decomposition of formats, besides acting as a promoter for CO 2 adsorption. Hydrogen was dissociatively adsorbed on WC/AC and could spill over to K 2 O to associate with CO 2 . This resulted in the formation of formate species for the production of CO.