화학공학소재연구정보센터
Bioresource Technology, Vol.176, 257-266, 2015
Hydrogen from ethanol reforming with aqueous fraction of pine pyrolysis oil with and without chemical looping
Reforming ethanol ('EtOH') into hydrogen rich syngas using the aqueous fraction from pine bio-oil ('AQ') as a combined source of steam and supplementary organic feed was tested in packed bed with Ni-catalysts 'A' (18 wt%/alpha-Al2O3) and 'B' (25 wt%/gamma-Al2O3). The catalysts were initially pre-reduced by H-2, but this was followed by a few cycles of chemical looping steam reforming, where the catalysts were in turn oxidised in air and auto-reduced by the EtOH/AQ mixture. At 600 degrees C, EtOH/AQ reformed similarly to ethanol for molar steam to carbon ratios (S/C) between 2 and 5 on the H-2-reduced catalysts. At S/C of 3.3, 90% of the carbon feed converted on catalyst A to CO2 (58%), CO (30%) and CH4 (2.7%), with 17 wt% H-2 yield based on dry organic feedstock, equivalent to 78% of the equilibrium value. Catalyst A maintained these outputs for four cycles while B underperformed due to partial reduction. (C) 2014 The Authors. Published by Elsevier Ltd.