Abstract: The active carbon and active char were used as the desulfurizer and BET, XPS techniques were used to analyze and characterize the physical and chemical properties of the sorbent. The results show that the desulfurization ability of the active carbon (char) has a close relation with its surface chemical functional groups，especially with C—O group. The reaction temperature has a great impact on the desulfurization performance of the active carbon (char). The desulfurizer shows a high reactivity, high sulfur capacity and fewer side reactions at 150℃～180℃. Meanwhile, the steam can promote the removal of hydrogen sulfide.