銅亜鉛系触媒を主に用いたエタノールの水蒸気改質の効率的な運転

抄録

Various studies have been conducted on ethanol steam reforming, but all of them are based on chemical studies of catalyst and theoretical simulation under ideal condition with a compact-size reactor. So, in order to establish the design criteria of a home-use-size reactor, the authors have studied characteristics of ethanol steam reforming using Cu/ZnO/Al₂O₃ catalyst for a reactor with an inner diameter of 23.5 mm, as well as Shinoki et al. (2011). In the present study, the authors examine the combination of different kinds of catalysts such as Ru/Al₂O₃ catalyst in addition to Cu/ZnO/Al₂O₃ catalyst, and experimentally investigate the influence and the controllability of vaporizer composing the steam reactor, comparing the chemical equilibrium theory. As a result, we confirmed that the temperature fluctuation inside the reactor can be reduced by 40 % in terms of the temperature control of vaporizer. Moreover, obtained concentrations by the present experiment are different from those by Shinoki et al. (2011), with higher efficiency. This suggests the possibility of hybrid steam reforming control and high performance from a chemical equilibrium point of view.