Influence of In Situ Formed Nickel- and Cobalt-Containing Catalysts on the Mechanism of Conversion of Heavy Oil Asphaltenes

摘要

Abstract The influence of the amount of precursors of cobalt and nickel oxides on the composition and structure of catalytic cracking products of heavy oil from the Zyuzeevskoye field was studied. It was found that an increase in the amount of a loaded precursor led to the destruction of a larger amount of resin–asphaltene components and the yield of an IBP–360°C fraction. It was established that nickel-containing catalysts facilitated the destruction of 66% high-molecular-weight components, and cobalt-containing catalysts contributed to a low yield of by-products. The structural group analysis of initial oil asphaltenes and those formed after thermal and catalytic cracking was studied. A possible mechanism of the reactions was presented based on the experimental data.