Abstract:

The iodine-sulfur（IS）thermochemical cycle is an extensively studied and prospective approach to nuclear hydrogen production. Among the three reactions of IS process，the Bunsen reaction，which connects the sulfuric acid and HI acid decomposition reactions，plays a key role in the closing of the cycle. Many researchers studied the Bunsen reaction，including operating conditions，products separation characteristics，side reactions and purification method，and new approaches were proposed. In this paper，the progress of the Bunsen reaction study is reviewed. The Bunsen reaction conditions and separation characteristics presented by various institutions are compared，the purification methods and results are summarized，and the optimal operating windows are recommended. In addition，the new approaches differing from conventional ones are introduced. These results may offer theoretical guide and basis for the smooth implementation of the Bunsen reaction，to achieve continuous and stable operation of the whole process.