Process for removing sulfur from a fuel gas stream additionally containing diolefins and oxygen

A process for removing sulfur from a fuel gas stream that additionally contains diolefins and oxygen as well as organic sulfur compounds, wherein said process comprises:

• introducing said fuel gas stream into a pretreatment reactor wherein it is contacted with hydrogen in the presence of a catalyst under conditions that the diolefins contained in said fuel gas stream are substantially converted to olefins and the oxygen contained in said fuel gas stream is substantially converted to water vapor;
• introducing said fuel gas stream depleted in diolefins and oxygen into a hydrotreater reactor wherein said fuel gas stream is contacted with hydrogen in the presence of a hydrotreating catalyst under hydrodesulfurization process conditions, yielding from said hydrotreater reactor a hydrotreated fuel gas containing hydrogen sulfide;
• and
• treating said hydrotreated fuel gas to remove hydrogen sulfide therefrom, thereby yielding a treated fuel gas stream having a reduced concentration of hydrogen sulfide and organic sulfur compounds.