Integrity Test on Ceramics Sulfuric Acid Decomposer in Thermochemical Iodine-sulfur Process

摘要

The Japan Atomic Energy Agency (JAEA) has been conducting research and development on the thermochemical iodine-sulfur (IS) process for nuclear-powered hydrogen production. The process directly uses the heat produced by high-temperature gas-cooled reactors. One of important engineering tasks is confirming integrity of components made of industrial materials in high-temperature and severe corrosive environments of IS process. A sulfuric acid decomposer, a key component in the sulfuric acid processing (vaporization and decomposition reaction), was test-fabricated from SiC ceramics and glass-lined steel. The decomposer would be designed equivalent of hydrogen production rate of 150 NL/h. A test apparatus has been assembled to examine the decomposer for reaction performances and long-term corrosion resistance under the practical condition of the sulfuric acid processing. This report will present brief of the test apparatus and current status of the integrity test.