Composition of products of cracking of oxidized sulfur-containing vacuum gasoil components

Abstract

The degradation of feedstock entering the refinery, leads to the need to increase the depth of oil refining. One of the promising methods for the processing of heavy hydrocarbon feedstocks is the combination of oxidation and subsequent cracking, which makes it possible to effectively remove polyaromatic sulfur compounds and to obtain additional quantities of distillate fractions. To develop effective methods of cracking of the products of oxidation of sulfur compounds, it is necessary to establish their thermal stability and the dependence of changes in the composition and properties of products on the conditions of oxidation and subsequent cracking. Vacuum gas oil was oxidized with a mixture of hydrogen peroxide with formic acid. The oxidized gas oil was cracked or divided into polar and non-polar components, with subsequent cracking. The composition of sulfur compounds of the cracking products was analyzed by chromatographic methods. Selective cracking of polar and non-polar components allows reducing gas formation and increasing the yield in distillate fractions. Depending on the conditions, reactions of cracking of oxidized sulfur compounds can proceed with the formation of a wide range of thiophene derivatives. Further investigations will allow gaining a better understanding of the patterns of transformations of sulfur-containing compounds of vacuum distillates in oxidative and thermal processes.The degradation of feedstock entering the refinery, leads to the need to increase the depth of oil refining. One of the promising methods for the processing of heavy hydrocarbon feedstocks is the combination of oxidation and subsequent cracking, which makes it possible to effectively remove polyaromatic sulfur compounds and to obtain additional quantities of distillate fractions. To develop effective methods of cracking of the products of oxidation of sulfur compounds, it is necessary to establish their thermal stability and the dependence of changes in the composition and properties of products on the conditions of oxidation and subsequent cracking. Vacuum gas oil was oxidized with a mixture of hydrogen peroxide with formic acid. The oxidized gas oil was cracked or divided into polar and non-polar components, with subsequent cracking. The composition of sulfur compounds of the cracking products was analyzed by chromatographic methods. Selective cracking of polar and non-polar components allows reducing g...