Physicochemical and Catalytic Properties of Rhenium-Containing Zeolites in the Course of Straight-Run Gasoline Upgrading

Abstract

Catalysts for upgrading of the straight-run gasoline fraction of oil were prepared on the basis of a ZSM‑5 zeolite via dry mechanical mixing with an ultrafine rhenium powder. It was shown how the structural and acidic characteristics of zeolite ZSM‑5 changed when it was modified with rhenium. The concentration and nature of carbon condensation products formed on the prepared catalysts during the processing of straight--run gasoline have been determined. An enhancement of operating efficiency of rhenium--containing zeolite catalysts in comparison with an unmodified zeolite was established, which consisted in increasing their capacity and reducing the rate of deactivation in the process under study