Asahi Glass to recover hydrogen to cut CO2 emission

Asahi Glass Co. announed on 22 September 2006 that it will install a new boiler system at its plant in Kamisu, Ibaraki Prefecture, that will recover and use as fuel hydrogen generated in the manufactu…

Asahi Glass Co. announed on 22 September 2006 that it will install a new boiler system at its plant in Kamisu, Ibaraki Prefecture, that will recover and use as fuel hydrogen generated in the manufacture of products including caustic soda. The boiler will reduce the amount of carbon dioxide emitted by the plant and also hold down fuel costs. The company expects an annual reduction in carbon dioxide emissions of 8,000 tons, which is equivalent to 6% of the carbon dioxide generated by the plant in a year. Asahi Glass will invest about JPY 400 million in the boiler system and aims to place it in operation in June 2007. The electrolysis of sodium chloride solution produces hydrogen and chlorine, in addition to caustic soda, which is also known as sodium hydroxide. To date, the Kamisu plant has for the most part simply treated the by-product hydrogen, rendering it harmless and releasing it to the atmosphere. Asahi Glass will first install equipment to collect the hydrogen emitted by its electrolysis system, and then it will install a boiler that will use the collected hydrogen as fuel to produce steam. The steam generated will be used for the concentration of caustic soda and other purposes, and will account for about 20% of the volume of steam that the plant uses.