The effect of sulfides on the hydrogena-tion performance of catalyst LY-2008 for pyrolysis gasoline one-stage hydrogenation was investigated,and the deactivation mechanism was analyzed.The results showed that dimethyl disulfide,butyl mer-captan,dimethyl sulfide,thiophene except carbon disulfide had very little effect on dienes hydrogena-tion.The poisoning of the five sulfides for olefin hy-drogenation was as follows:dimethyl disulfide,butyl mercaptan,carbon disulfide,dimethyl sulfide,thio-phene.The maximum tolerance of carbon disulfide was 50 μg/g,carbon disulfide was the main deacti-vation reason of dienes hydrogenation on catalyst LY-2008.
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