Patent ID: 8921630
Filing Date: 2014-12-30
Classification: C10L

Abstract:
1. A process for removing sulfur from a refinery fuel gas stream that additionally contains from 2 ppmv to 2.0 vol % diolefins and from 10 ppmv to 5.0 vol % 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 comprising a Group VIB metal and a Group VIII metal selected from the group consisting of cobalt and nickel, on a porous refractory oxide support under mild hydrotreating conditions including a temperature in the range of from 150 ° F. to 350° F., a pressure in the range of from 50 to 400 psig and a gaseous hourly space velocity in the range of from 0.05 hr 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, including a hydrotreater reactor inlet temperature that is greater than the pretreatment reactor inlet temperature, yielding from said hydrotreater reactor a hydrotreated fuel gas containing hydrogen sulfide; and treating said hydrotreated fuel gas with an amine absorbent to remove hydrogen sulfide therefrom, thereby yielding a treated fuel gas stream having a reduced concentration of hydrogen sulfide and organic sulfur compounds.