| 摘要 |
<p>Regeneration of spent metal oxide adsorbents (I), from the Ce, Cu, Fe and Mg oxide gp., used for the desulphurisation of a waste gas stream at 300-700 degrees C., is carried out by contacting (I) with a reducing-regenerating gas contg. 0.5-100.0 (1-70) vol.% H2S, rest unreactive gas (He, Ne, Ar, CO2, N2 and/or stream), at 300-700 degrees C. and a suitable flow rate, pref. of 50-50,000 V/V-hr. The process is esp. useful for the purification of waste gas from Claus plants and the removal of SO2/SO3 from refinery waste gases or waste gases from the gasification of liquefaction of coal, heavy oil sand refineries etc., H2S being obtd. as by-prod.</p> |
