Experimental study on improving the efficiency of hydrogen production by partial oxidation of ethanol

摘要

Bioethanol as the renewable biomass fuel gradually becomes a promising feedstock for hydrogen production. To improve the efficiency of hydrogen production, a typical double layer porous media burner was established for the partial oxidation reaction of ethanol (POE). The effects of porous media structure, initial ethanol and air conditions on the temperature distribution and gas production were investigated based on the start-up characteristics of the burner. The results indicate that the lowest start-up time (2400 s) and best hydrogen production (9.80) were obtained by filling the downstream section with 8 mm Al2O3 pellets and introducing ethanol at the upstream inlet, compared with that of 6 and 10 mm pellets. The productions of methane and hydrogen were improved to some extent by adding the water with 10 fraction. And the highest concentration of hydrogen was achieved at the air velocity of 8 cm/s. When the O-2/C ratios were 0.2 and 0.25, the maximum hydrogen yield (23.28) and ethanol conversion (77.42) were obtained respectively. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.