Steam reformation of hydrogen sulfide
| Autor: | Alexandre F. T. Yokochi, Nick AuYeung |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Arrhenius equation
Hydrogen Renewable Energy Sustainability and the Environment Chemistry Hydrogen sulfide Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Catalysis Steam reforming Sulfur–iodine cycle symbols.namesake chemistry.chemical_compound Fuel Technology Molybdenum symbols Nuclear chemistry Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 38:6304-6313 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2013.01.029 |
| Popis: | A modified version of the Sulfur–Iodine cycle, here called the Sulfur–Sulfur Cycle, offers an all-fluid route to thermochemical hydrogen and avoids implications of the corrosive HI–H 2 O azeotropic mixture: (1) 4I 2(l) + 4SO 2(l) + 8H 2 O (l) ↔ 4H 2 SO 4(l) + 8HI (l) (120 °C) (2) 8HI (l) + H 2 SO 4(l) ↔ H 2 S (g) + 4H 2 O (l) + 4I 2(l) (120 °C) (3) 3H 2 SO 4(g) ↔ 3H 2 O (g) +3SO 2(g) + 1½O 2(g) (850 °C) (4) H 2 S (g) + 2H 2 O (g) ↔ SO 2(g) + 3H 2(g) (900–1500 °C) The key step in the Sulfur–Sulfur cycle is the steam reformation of hydrogen sulfide, which is highly endothermic and has a positive Gibbs free energy change. The steam reformation of hydrogen sulfide was investigated under favorable circumstances (excessive dilution with steam and inert carrier) over a variety of catalytic and non-catalytic settings in a quartz tube. Successful results were obtained by pretreating a molybdenum wire with H 2 S at high temperature. Apparent Arrhenius parameters for both thermal splitting and steam reformation of hydrogen sulfide were determined. |
| Databáze: | OpenAIRE |
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