Characteristic of the Pressurized Continuous Bunsen Reaction using HI_xSolution

Abstract

Abstract. The Sulfur-Iodine thermochemical hydrogen production process (SI process) consists of the Bunsen reaction section, the H 2 SO 4 decomposition section and the HI decomposition section. The HI x solution (HI-I 2 -H 2 O) could be recycled to Bunsen reaction section from the HI decomposition section in the operation of the integrated SI process. The phase separation characteristic of the Bunsen reaction using the HI x solution was similar to that of SO 2 -I 2 -H 2 O system. However, the amount of produced H 2 SO 4 phase was too small. To solve this problem, the study was carried out by the pressurized continuous Bunsen reaction. Bunsen reactions were performed at variation of feed rate of SO 2 /O 2 gas in 3 bar of atmosphere. Also, it was performed to check the effects of the residence time in the reservoir on the characteristics of Bunsen products. As the results, the concentration of H 2 SO 4 and HI in Bunsen products was increased with increasing the amounts of SO 2 . When the residence time in the reservoir increased, the concentration of H 2 SO 4 and HI in HI x phase was decreased by reverse Bunsen reaction.