atom and X is a sulfur (S), nitrogen (N) or oxygen (O) atom. The net result of a hydrogenolysis reaction is the formation of C-H and H-X chemical bonds. Thus, hydrodesulfurization is a hydrogenolysis reaction. Using ethanethiol , a sulfur compound present in some petroleum products, as an example, the hydrodesulfurization reaction can be simply expressed as

: \overset{Ethanethiol}{C2H5SH} + \overset{Hydrogen}{H2}->\overset{Ethane}{C2H6} + \overset{Hydrogen\ sulfide}{H2S}For