Survey of Bunsen reaction routes to improve the sulfur–iodine thermochemical water-splitting cycle
Survey of Bunsen reaction routes to improve the sulfur–iodine thermochemical water-splitting cycle
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DOI：
10.1016/j.ijhydene.2008.11.009
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发表时间：
2009-05
影响因子：
7.2
通讯作者：
A. Giaconia;G. Caputo;S. Sau;P. Prosini;A. Pozio;M. D. Francesco;P. Tarquini;L. Nardi
中科院分区：
文献类型：
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作者：
A. Giaconia;G. Caputo;S. Sau;P. Prosini;A. Pozio;M. D. Francesco;P. Tarquini;L. Nardi
在硫-碘热化学循环的本生反应步骤中通常使用大量过量的水和碘，以引起两种酸产物的液-液相分离。本文概述了进行本生反应的一些替代路线。首先讨论了除水之外的反应溶剂的使用，并给出了用磷酸三丁酯获得的实验结果。另一种方法是通过选择性沉淀不溶性盐来分离产物酸，并详细讨论了添加硫酸铅作为沉淀剂。最后，研究了电化学本生反应路线。所有这些方法都有可能减少硫-碘循环对碘和/或水的需求。
A large excess of water and iodine is typically employed in the Bunsen reaction step of the sulfur–iodine thermochemical cycle in order to induce liquid–liquid phase separation of the two acid products. This paper presents an overview of some alternative routes for carrying out the Bunsen reaction. The use of a reaction solvent other than water is first discussed, and experimental results obtained with tributylphosphate are presented. Another approach is separation of the product acids by selective precipitation of insoluble salts, and the addition of lead sulfate as the precipitating agent is discussed in detail. Finally, the electrochemical Bunsen reaction route is investigated. All of these methods have the potential to reduce the iodine and/or water requirement of the sulfur–iodine cycle.