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The steam regeneration and SO2 regeneration of tin oxide for warm syngas desulfurization is studied in the temperature range of 400-600 C.In the steam regeneration,reversible removal of H2S achieved.Regenerated H2S concentration increased with the increasing regeneration temperature.SnO2 sorbent can achieve a complete regeneration by steam at 500 and 600 ℃.In the SO2 regeneration,elemental sulfur was produced by the reaction of SnS and SO2.Raising the regeneration temperature (500-600 ℃) or SO2 concentration (1.5-10 vol％) improved the regeneration rate.Under SO2 regeneration at 500 ℃,SnS2 formed in the sorbent due to the interconversion of tin sulfides.Under steam regeneration or SO2 regeneration,the cyclic breakthrough sulfur capacity of SnO2 sorbent decreased because of the sintering caused by low melting component SnS.A two-stage regeneration process was applied to recover the elemental sulfur which achieved a complete regeneration.