Desulfurization of Gasoline

Abstract

Although gasoline blending streams exhibit widely varying sulfur concentrations, significant quantities of low-sulfur motor gasoline cannot be manufactured by reallocation of existing components without substantial sacrifices in the useful properties of the remaining fuels having normal sulfur levels. To meet the anticipated demand for low-sulfur unleaded gasoline which may be required for catalyst-equipped automobiles it will be necessary to install process equipment based on known hydrotreating technology.The effects which this construction program would exert on the activities, abilities and needs of one petroleum refiner are sketched for two degrees of sulfur removal. The impacts of installing the process facilities which would be necessary are discussed in terms of time requirements, capital needs, and added energy expenditures.

Reaction of Thiophene with Sodium on Alumina. A Method for Desulfurization of Volatile Fuels

“…The influence of both reagent sodium content and reaction temperature on reaction stoichiometry and product distribution have been determined. Thiophene was selected as a model compound due to its simplicity and the fact that fuel analyses (Rail et al, 1972; McKinney, 1972; Carrales, 1975) and evaluations of existing desulfurization technology suggest that sulfur containing organics within this class are among the more difficult to remove in trace quantities from gasoline fractions (Hoffman, 1973;Berger, 1974;Kellogg Co., 1974;Gasoline, 1974;Shell Oil Co., 1975). The results of the thiophene study have led to the proposal of a generalized reaction scheme which accounts for the products of the desulfurization reaction.…”