Improved solvation routes for the Bunsen reaction in the sulphur iodine thermochemical cycle: Part III–Bunsen reaction in molecular solvents
| Autor: | Marie L. Taylor, Ray W.K. Allen, Rachael H. Elder |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Solvation Energy Engineering and Power Technology chemistry.chemical_element Alkylation Condensed Matter Physics Sulfur Solvent chemistry.chemical_compound Fuel Technology chemistry Bunsen reaction Thermochemical cycle Butyl iodide Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 38:1784-1794 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2012.11.099 |
| Popis: | Operating the Bunsen reaction in a solvent has the potential to increase SI cycle efficiency and decrease operating costs. Analysing the solvent–acid mixtures produced is complicated as additional acid is formed when SO 2 comes into contact with water. Tri- n -butyl phosphate (TBP) is suitable for HI extraction; however, it is susceptible to acid catalysed dealkylation, resulting in solvent decomposition and the production of butyl iodide. Cyanex ® 923 is found to be superior to TBP in the Bunsen reaction due to its high affinity for HI. Strong orange complexes between HI, SO 2 and the phosphoryl group in Cyanex ® 923 are formed, giving good product separation, however severely hampering HI recovery. Washing the organic phase with water resulted primarily in the removal of H 2 SO 4 . HI could then be recovered either thermally or with a second wash step. The Bunsen reaction in Cyanex ® 923 remains far from optimised, however priority should be given to developing a more sophisticated analytical method in order to fully characterise the system. |
| Databáze: | OpenAIRE |
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