International Journal of Hydrogen Energy, Vol.45, No.22, 12298-12307, 2020
Experimental study of ultra-rich thermal partial oxidation of methane using a reticulated porous structure
Performance of SiC porous burner used in a non-catalytic partial oxidation reformer for syngas production was experimentally investigated in this study. Premixed combustion of ultra-rich methane-oxygen mixtures was conducted at thermal loads of 6 and 8 kW. In order to have a comprehensive analysis, temperature distribution along the burner and product compositions were measured. Moreover, a thermodynamic analysis was performed using Gibbs free energy minimization method to calculate equilibrium concentrations prior to the experimental work. The results showed that the highest syngas mole fraction of 0.67 and H-2/CO ratio of 1.86 can be achieved at higher power. The CH4 conversions were found to be in the range of 79-96%, while the equilibrium data indicated complete consumption of methane. Eventually, this study proved high reforming efficiency of partial oxidation process within SiC porous burner, with a good methane conversion and syngas purity. Therefore, due to highly efficient characteristics of this burner, it may be a good solution in development of reformers, particularly for small-scale applications. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.