Dehydrogenation of a mixture of light alkanes on supported platinum metals in a reducing atmosphere

Abstract

A mixture of light alkanes simulates associated gas of oil production, the growth of oil and gas production in the world, and especially in Kazakhstan, leads to the fact that associated gases of oil production continue to be flared, causing significant harm to the environment, at a time when they are a valuable petrochemical feedstock. Active and selective catalysts are needed to convert inert alkanes to olefins. We prepared 3% Pt, Pd, Ru on γ – Al2O3 by the incipient wetness impregnation method. The transformation of a mixture of light alkanes C1-C4 has been carried out on a laboratory flow-bench apparatus in four modes at atmospheric pressure and temperatures of 350-500oC. The freshly prepared and spent catalysts were investigated by physicochemical methods TEM, SEM and BET. The maximum yield is formed for 3% Ru / γ – Al2O3 when a mixture of light alkanes with water is fed together at 500 ° C. We assume that water shifts the equilibrium in the system, resulting in the formation of dissipative structures that affect the activity of catalysts.