화학공학소재연구정보센터
Energy & Fuels, Vol.30, No.10, 8432-8440, 2016
Comparative Study on Steam Reforming of Single- and Multicomponent Model Compounds of Biomass Fermentation for Producing Biohydrogen over Mesoporous Ni/MgO Catalyst
Steam reforming (SR) of single model molecules (acetone, butanol, and ethanol) and a specific mixture (butanol/ acetone/ethanol = 6/3/1, mass ratio) assumed as a model of biobutanol raw mixture has been researched over mesoporous Nix/ MgO catalysts (x represented nickel mole percent in Ni Mg) at 673-873 K. The result showed reactant conversion at lower temperatures allowed ranking the three single-molecule compounds as the function of SR activity as follows: ethanol > acetone > butanol. The catalytic performance of mesoporous Ni-0.12/MgO catalyst with lower Ni component containing enough active sites outperformed that of mesoporous Ni-0.16/MgO catalyst which was more inclined to sinter in all SR tests of single-component compounds except at 673 K. On the contrary, the catalytic behavior of Ni-0.16/MgO (richer in nickel) was superior to that of Ni-0.12/MgO catalyst in SR of multicomponent compounds. Moreover, in acetone butanol ethanol steam reforming (ABESR), SR of ethanol suffered competition from acetone and butanol, suppressing ethanol molecule access to the limited active sites of the catalyst. As a consequence, the conversion of ethanol in SR of multicomponent compounds decreased compared to that in SR of pure ethanol.