Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8961259 | International Journal of Hydrogen Energy | 2018 | 10 Pages |
Abstract
Biogas conversion to syngas (mainly H2 and CO) is considered an upgrade method that yields a fuel with a higher energy density. Studies on syngas production were conducted on an inert porous media reactor under a filtration combustion mode of biogas with steam addition, as a non-catalytic method for biogas valorization. The reactor was operated under a constant filtration velocity of 34.4Â cm/s, equivalence ratio of 2.0, and biogas concentration of 60Â vol% Natural Gas/40Â vol% CO2, while the steam to carbon ratio (S/C) was varied between 0.0 and 2.0. Total volumetric flow remained constant at 7Â L/min. Combustion wave temperature and propagation rate, product gas composition, reactants conversion as well as H2 and CO selectivity were measured as a function of S/C ratio. Chromatographic parameters, method validation and measurement uncertainty were developed and optimized. It was observed that S/C ratio of 2.0 gave optimal results under studied conditions for biogas conversion, leading to maximum concentrations of 10.34Â vol% H2, 9.98Â vol% CO and highest thermal efficiency of 64.2% associated with a modified EROI of 46.3%, which considered energy consumption for steam supply. Conclusions indicated that the increment of the steam co-fed with the reactants favored the non-catalytic conversion of biogas and thus resulted in an effective fuel upgrading.
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Authors
Lorena Espinoza, Fabián Guerrero, Nicolás Ripoll, Mario Toledo, Lorna Guerrero, Andrea Carvajal, Andrea Barahona,