PRODUCTION OF HYDROGEN BY SYNERGY OF SOFCS AND MICROREFORMERS, PART 1: THEORETICAL STUDY OF MICROREFORMER PARAMETERS
In this work it was determined the necessary anodic recirculation ratio that maximizes the hydrogen production for a processintegrated by a solid oxide fuel cell (SOFC) and a micro-reformer fed with biogas. For this purpose, a thermodynamic studywas made of the recirculation effects over: a) the rat...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2017 |
| Country: | México |
| Institution: | Instituto Tecnológico y de Estudios Superiores de Monterrey |
| Repository: | Redalyc-ITESM |
| OAI Identifier: | oai:redalyc.org:62049878023 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=62049878023 |
| Access Level: | Open access |
| Keyword: | Ingeniería SOFC Biogas reforming |
| Summary: | In this work it was determined the necessary anodic recirculation ratio that maximizes the hydrogen production for a processintegrated by a solid oxide fuel cell (SOFC) and a micro-reformer fed with biogas. For this purpose, a thermodynamic studywas made of the recirculation effects over: a) the ratio of reforming agents/methane, b) the outlet/inlet atomic hydrogen ratio(ψ), c) the reactor relative size, and d) the normalized electric energy output. The results show that in order to avoid coking,a steam-to-carbon ratio (S/C) higher than 2 is unnecessary, for a combined reforming with steam and CO2. Moreover, itwas found thatψis maximized at a recirculation ratio of 0.22; and that an increase of recirculation caused a decrease in theelectrical energy produced, and an increase in the relative reactor volume. Finally, it was found that a recirculation ratio of0.22 was the best option for an operating temperature of 850°C. If the recirculation ratio is exceeded to achieve S/C=2, thehydrogen fraction produced will decrease 50% and the reactor volume will increase 118% for the same amount of biogasfed. |
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