D213 高次炭化水素燃料を用いた水蒸気改質器による水素製造(OS4 水素・燃料電池),動力エネルギーシステム部門20周年,次の20年への新展開)

Abstract

The authors develop a small and simple steam-reforming reactor in a home-use size for n-dodecane as a heavy-hydrocarbons fuel. Under such a well-controlled condition by a thermal diffuser as the reactor satisfies two target-temperature criteria, the authors measure the inside-temperature profile and the hydrogen-molecule ratio (concentration) R_<H2>, together with the molecule ratios R_<CH4>, R_<CO> and R_<CO2> of other main gass components such as CH_4, CO and CO_2, respectively. In addition, the authors conduct numerical simulations, as well as experiments. As a result, the authors successfully achieve suitable inside-temperature profiles. The effects of the steam-to-carbon molar ratio S/C upon R_<H2>, R_<CH4>, R_<CO> and R_<CO2> are shown, experimentally and theoretically. The experimental results agree well with the theoretical ones. Besides, both carbon balance and conversion ratio show high accuracy in experiments.