| 摘要 |
A process for desulphurization of a gaseous substrate containing O2, SO2, SO3, H2, SO4, H2S, CS2, COS and/or organic sulphur-containing components. The combustible components are oxidized catalytically into H2O, CO2, and SO2. The SO2 is further oxidized catalytically into SO3, which in presence in the substrate of at least an equivalent amount of H2O in the gas, is further hydrated and condensed as sulphuric acid. The process is conducted in two reactors that are connected in series, each reactor being loaded with a layer of inert material below a layer of oxidation catalyst. The process includes reversing a direction of gas flow in the reactors after periods of about 1-40 minutes. The temperature in layers of the oxidation catalyst in the reactors is maintained in a range of 300-500<o>C. The temperature of the gas stream leaving the reactors is at least 50<o>C below the H2SO4 dew point of the process gas after oxidation of the sulphur content in the feed gas. Condensed sulphuric acid is drained off from the bottom of each of the reactors.
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