Applicability test of glass lining material for high-temperature acidic solutions of sulfuric acid in thermochemical water-splitting IS process

Iwatsuki, Jin ; Tanaka, Nobuyuki ; Watanabe, Yutaka*; Terada, Atsuhiko  ; Onuki, Kaoru

A key issue for realizing the thermochemical IS process for hydrogen production is the materials of construction working under high-temperature acidic solutions of sulfuric acid and hydriodic acid dissolving iodine. Glass lining material is a promising candidate, which is composed of steel having good strength and glass having good corrosion resistant performance. Since, the applicability of glass lining material depends strongly on the service condition, corrosion tests using glass used in glass lining material and heat cycle tests using glass lining piping were carried out to examine the possibility of using the glass lining material at high-temperature acidic solutions of sulfuric acid. It was confirmed that the glass lining materials exhibited sufficient corrosion resistance and heat resistance in high-temperature sulfuric acid of IS process.