Enhancement of SO2 high temperature depolarized electrolysis by means of graphene oxide composite polybenzimidazole membranes
In the present work, Polybenzimidazole-composite membranes with graphene oxide as organic filler with different contents (0.5, 1.0, 2.0 and 3.0 wt%) were prepared and tested in a sulfur depolarized electrolyzer. The composite Graphene Oxide/Polybenzimidazole membranes show greater electrolyzer perfo...
| Authors: | , , , , |
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| Format: | article |
| Publication Date: | 2022 |
| Country: | España |
| Institution: | Universidad de Castilla-La Mancha |
| Repository: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/36288 |
| Online Access: | https://hdl.handle.net/10578/36288 |
| Access Level: | Open access |
| Keyword: | SO2 depolarized electrolysis Green hydrogen High-temperature electrolysis PBI membrane Graphene oxide |
| Summary: | In the present work, Polybenzimidazole-composite membranes with graphene oxide as organic filler with different contents (0.5, 1.0, 2.0 and 3.0 wt%) were prepared and tested in a sulfur depolarized electrolyzer. The composite Graphene Oxide/Polybenzimidazole membranes show greater electrolyzer performance than a standard membrane. For the first time, actual hydrogen production is reported at high temperature in the range of 110 °C–140 °C for the sulfur dioxide depolarized electrolysis. In general, composite Graphene Oxide/Polybenzimidazole membranes showed superior performance, obtaining the highest hydrogen generation with the composite membrane with a content of 2 wt%. Furthermore, sulfur dioxide crossover is reported to decrease by increasing the amount of graphene oxide into the membrane, demonstrating the benefit of adding Graphene Oxide to a Polybenzimidazole matrix for the sulfur dioxide depolarized electrolysis. |
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