High-Temperature Gaseous H2S Removal by Zn–Mn-based Sorbent
| Autor: | Moo Been Chang, How Ming Lee, Li Feng Guo, Kuan Lun Pan |
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| Rok vydání: | 2015 |
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| Zdroj: | Industrial & Engineering Chemistry Research. 54:11040-11047 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.5b02078 |
| Popis: | Zn–Mn oxides supported on γ-Al2O3 are experimentally evaluated as an adsorbent for removing H2S from gas streams in the temperature range of 350–600 °C. Experimental results indicate that zinc and manganese oxide can be integrated to form a good solid solution for effective adsorption of H2S. With an operating temperature of 600 °C and 200 ppm of H2S on the gas stream, the adsorption capacity of H2S achieved with 10 wt % Zn–Mn/γ-Al2O3 (ZMA) reaches 52 mg S/g at a gas hourly space velocity (GHSV) of 20 000 h–1. Additionally, kinetic study is conducted to evaluate the activation energy. Results indicate that the activation energy of ZMA is 51 kJ/mol and that the reaction rate constant increases with increasing temperature. In addition, the H2S adsorption capacity of ZMA would be significantly increased as CO2, H2, and CO are added into the gas stream individually. In the regeneration process, the activity of ZMA can be completely recovered with air at the low regeneration temperature of 300 °C. Furthermore,... |
| Databáze: | OpenAIRE |
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