H2S/SO2 removal in the modified-claus reaction over packed alumina beds

✍ Scribed by Chou, C.-L. (Joe)

• Publisher: American Institute of Chemical Engineers
• Year: 1987
• Tongue: English
• Weight: 724 KB
• Volume: 6
• Category: Article
• ISSN: 0278-4491
• DOI: 10.1002/ep.670060330

✦ Synopsis

The removal of H2S and SO2 by the modified-Claus reaction was studied in a computercontrolled packed bed system over activated alumina catalyst. The reactor system consisted of two 6.35 x 60.96 cm reactors in parallel and was designed to allow for the axial temperature monitoring and side stream sampling. The H2S1SO2 conversion efficiencies were evaluated against gas-hourly space velocity (GHSV) ranging from 100 to 12,000 llhr at the three typical Claus converter conditions for three sixes of Alcoa S-100 Claus catalyst. The conditions for defining the kinetic and thermodynamic regimes of the modijied-Claus reaction were reported. The thermodynamic regime was checked and confirmed by the equilibrium predictions of a computer program utilizing the principle of minimization of Gibbs free energy. The possible rate-controlling mechanism in the kinetic regime and the effects of water vapor on the reaction were discussed.