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Hydrogenation is a chemical process in which hydrogen gas is bubbled through a liquid oil in the presence of a catalyst, often a reactive metal such as platinum or nickel. The resulting reaction forces unsaturated fatty acids to accept additional hydrogen atoms and become at least partially saturated.
Ad. In hydrotreating, hydrogen is introduced into a mixture to increase the overall hydrogen count. Petroleum undergoes what is specifically called hydrogenolysis. This is when the carbon and sulfur bond contained within petroleum is split, and a hydrogen atom is linked to both the carbon and the sulfur atom.d. In hydrotreating, hydrogen is introduced into a mixture to increase the overall hydrogen count. Petroleum undergoes what is specifically called hydrogenolysis. This is when the carbon and sulfur bond contained within petroleum is split, and a hydrogen atom is linked to both the carbon and the sulfur atom.