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Report No.
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Introduction of loop operating system to improve the stability of continuous hydrogen production for the thermochemical water-splitting iodine-sulfur process

Tanaka, Nobuyuki ; Takegami, Hiroaki ; Noguchi, Hiroki  ; Kamiji, Yu; Myagmarjav, O.  ; Kubo, Shinji  

The thermochemical water-splitting iodine-sulfur (IS) process enables producing hydrogen. In a previous operation procedure, after the components of the unit operations were individually started, they were connected at the same time. However, it was challenging to stably interconnect the components. This study introduces a new loop operation, subdividing the process configuration into four sections before transferring the continuous operation. The proposed loop operation was validated analyzing the material and heat balances of each section. The calculated results showed that the material balances of respective loop sections were closed. The loop operation mode would transfer to the continuous operation by connect all sections. Regarding the switching of operation modes, the material and heat balance showed no or little difference, indicating that two operation modes could only be changed by switching the pipelines. Consequently, the loop sections could be individually operated to stabilize the IS process system, and the loop operation could be smoothly transferred to the continuous operation.

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Category:Chemistry, Physical

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