硫-碘循環
硫-碘循环（S-I 循环）是用于生产氢气的三步热化学循环。 S-I 循环由三个化学反应组成，其净反应物是水，净产物是氢和氧。 所有其他化学品都被回收利用。 S-I 过程需要有效的热源。
目前日本正在研究基于硫-碘循环的制氢技术。
具体反应过程如图：
| H2O | ½O2 | |||||
| ↓ | ↑ | |||||
| I2 | → | Reaction 1 | ← | SO2+H2O | ← | Separate |
| ↑ | ↓ | ↑ | ||||
| 2HI | ← | Separate | → | H2SO4 | → | Reaction 2 |
| ↓ | ||||||
| H2 |
参考文献
- Paul M. Mathias and Lloyd C. Brown "Thermodynamics of the Sulfur-Iodine Cycle for Thermochemical Hydrogen Production", presented at the 68 th Annual Meeting of the Society of Chemical Engineers, Japan 23 March 2003.
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