Development of sulfuric acid transfer pump for thermochemical water-splitting IS process

Jin Iwatsuki, Yutaka Watanabe, Atsuhiko Terada, Kaoru Onuki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The thermochemical IS process for hydrogen production involves the use of highly corrosive sulfuric and hydriodic acids at high temperature and pressure, and the development of corrosion-resistant materials for main components is therefore crucial to process development. This paper concerns the development of a sulfuric acid transfer pump, an important component in transferring high-temperature concentrated sulfuric acid in the sulfu-ric acid decomposition step of the IS process. A reciprocating plunger pump made of SiC ceramics and common metal alloys was designed to meet the required corrosion resistance, thermal resistance and compressive strength for the transfer of high-temperature concentrated sulfuric acid. The pump was test-fabricated, and its performance in an IS test plant with a hydrogen production capacity of 30 m3/h was verified in terms of the pressure resistance and the transfer performance.

Original languageEnglish
Pages (from-to)441-446
Number of pages6
JournalKagaku Kogaku Ronbunshu
Issue number5
Publication statusPublished - 2011


  • Hydrogen production
  • IS process
  • Pump
  • Sulfuric acid
  • Thermochemical method


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