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Composition of Hydrocarbons in Maltenes from Naphthenic Crude Oil after Cracking with WC/NI–CR Additive

Using GCMS the composition of hydrocarbons in maltenes from heavy naphthenic crude oil (Usa oilfield) after cracking in the presence of WC/Ni–Cr additive and without it has been studied. Cracking of maltenes carried out at 450°С within 2 hours in isothermal mode. Using WC/Ni–Cr additive during cracking contributes to the deepening of the destruction reactions in hydrocarbons and resins. It is shown, the content of low-molecular alkanes С11–С19, alkylbenzenes С9–С10 increases essentially in the maltenes cracked with the additive while that of cyclohexanes and bicyclanes decreases, tri-, tetra- and pentacyclic saturated hydrocarbons destruct completely as compared with maltenes cracked without the additive. There are changes in the composition of naphthenic hydrocarbons. The reactions of condensation occur along with destruction reactions, leading to the formation of polyaromatic hydrocarbon.