D214 低温度でのエタノール水蒸気改質による水素製造(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)

概要

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The authors try to reveal the dominant chemical reactions and the optimum conditions, supposing the design of ethanol steam-reforming reactors for hydrogen production. Experiments are conducted for Cu/ZnO/Al_2O_3 catalyst together with Ru/Al_2O_3 catalyst. Using a household-use-scale reactor with well-controlled temperature distributions, we specify the effect of liquid-hourly space velocity LHSV upon the ethanol conversion X_<C2H5OH> in the range of LHSV to 2.0h^<-1> at steam-to-carbon ratio S/C=3 and reaction temperature T=520K, and the effect of LHSV upon concentrations such as C_<H2>, C_<CO2>, C_<CO> and C_<CH4> at T=520K. X_<C2H5OH> attains a high value even at LHSV=2.0h^<-1>, but is unstable. The Cu/ZnO/Al_2O_3 catalyst shows rather high performance at low values of T for the ethanol steam reforming than the Ru/Al_2O_3 catalyst. The obtained concentrations suggest that the dominant chemical reactions at LHSV<0.2h^<-1> are different from those at LHSV≥0.2h^<-1>.
一般社団法人日本機械学会の論文
2010-06-20