关键词: S Zorb, 吸附, 加氢, Benson法, 热力学性质

Abstract: S Zorb process can reduce the sulfur content in gasoline to less than 10μg/g. But because of the addition of H2，not only the desulfurization reactions of sulfur compounds occur on the surface of the adsorption，but also the hydrogenation reactions of olefins and aromatics and the hydroisomerization reactions are associated during S Zorb reaction adsorption desulfurization. The thermodynamic properties of these reactions were analyzed in this paper，including reaction enthalpy，Gibbs free energy，equilibrium constant and thermodynamic conversion. The results show that all these typical reactions are exothermic and the order of heat release is as follows：aromatic hydrogenation＞thiophene desulfurization＞olefin hydrogenation＞the generation of mercaptan＞olefin isomerization. The results also show that mercaptan could not be produced after the thiophene desulfurization because of the less content of H2S in the reaction system during S Zorb reaction adsorption desulfurization.

Key words: S Zorb, adsorption, hydrogenation, Benson method, thermodynamic properties