High-pressure Water Electrolysis Research Articles

高圧水電解による高圧水素の製造動力の推定

高圧水電解による高圧水素の製造動力の推定

Hydrogen production by high temperature, high pressure water electrolysis, results of test plant operation

A high temperature, high pressure water electrolyzer has been developed. A test plant was built with a hydrogen production capacity of 4 m 3 h −1, operating at 120°C and 20 kg cm −2 G. The development of the test plant was reported previously. The test plant was operated for 22 months under various operating conditions and with various combinations of electrodes. Of the electrodes, a high surface area nickel electrode showed the best results, its cell voltage being 1.64 V at 102°C and 400 mA cm −2. PTFE impregnated with a Ti compound was used as the diaphragm material. The operating pressure did not show much effect on cell voltage.

A possible method of improving energy efficient para-LH2 production

Abstract Liquid hydrogen as a superior transport fuel, and bulk hydrogen as a desirable input for conversion of fossil fuel reserves to more convenient liquid hydrocarbons, points to the value of developing energy efficient means for producing liquid hydrogen. A feasibility study is made of a high-pressure water electrolysis and hydrogen liquefaction plant, in which the oxygen by-product is expanded to provide additional work and cooling. Performance is compared with ideal thermodynamic processes.