Catalysts and Selective Hydrotreating Processes of Catalytic Cracking Gasoline

Abstract

Content of catalytic cracking gasoline (GCC) in Russian blended gasoline is greater than 30 %. The most of sulfur in blended gasoline comes from GCC, while permitted sulfur content in commercial gasoline of Euro 5 standard is 10 ppm. High sulfur content of the GCC makes it impossible to use them without prior hydrotreating, inevitably reducing the octane number of gasoline. The nature of sulfur compounds that make the major contribution to the octane number was considered. An overview of modern technological processes and catalysts for hydrotreating of GCC was made. It was shown that modern gasoline desulfurization were based on pre-fractionation and separate purification of heavy and light fractions that made them technologically complicated and energy-intensive. Boreskov Institute of Catalysis together with AO “Gazpromneft-MNPZ” developed the catalyst and a single stage hydrotreating process of GCC. Developed catalyst provides selective hydrotreating of all GCC fractions without prefractionation to obtain gasoline with a sulfur content of no more than 10 ppm, and octane number loss not more than 1 point.