Abstract
Solid oxide electrolyser cells (SOECs) are the most electrically efficient electrolysers currently available, utilizing a variety of reactions like splitting of Steam or Steam/ CO2, and also operable in an assisted mode, with fuels, so long as O2- ions are formed and consumed. They operate at over 600 ⁰C, at efficiencies of close to 100% when operated at ‘thermo-neutral’ voltages, i.e., Vop = H/nF, where H, is the enthalpy of splitting of steam / steam-CO2 to Hydrogen/ Syngas, respectively, at the temperature.
In this work we are setting up an ‘assisted’ electrolysis cell by avoiding the production of Oxygen by having to overcome 1-1.1 V Nernst Potential barrier at ~800oC. We are focusing on utilising anodic oxygen by partial oxidation of bio-methane to syngas, thereby lowering the Nernst Potential ‘barrier’ at the anode surface, which would then lead to a much lower specific electrical consumption for CO2 reduction. The cathode feedstock is Steam and later, a CO2-H2O mixture, which will be reduced, as in a typical co-electrolyser, to syngas; the oxide ions generated during the reduction, travel to the anode, where they will ensure partial oxidation of a methane feed, to generate syngas again. Syngas generated thus, in both the electrodes is a valuable feedstock for a range of chemicals/ fuels like Methanol, and Fischer Tropsch liquids (potentially Sustainable Aviation Fuels).
Preliminary data on construction of button cells, their performance, and the usage of a Probostat testing unit is presented in this work. Some Aspen Plus simulations illustrating the overall process flow diagram for a Power to X, are also carried out, that show the feasibility of such a process.
In this work we are setting up an ‘assisted’ electrolysis cell by avoiding the production of Oxygen by having to overcome 1-1.1 V Nernst Potential barrier at ~800oC. We are focusing on utilising anodic oxygen by partial oxidation of bio-methane to syngas, thereby lowering the Nernst Potential ‘barrier’ at the anode surface, which would then lead to a much lower specific electrical consumption for CO2 reduction. The cathode feedstock is Steam and later, a CO2-H2O mixture, which will be reduced, as in a typical co-electrolyser, to syngas; the oxide ions generated during the reduction, travel to the anode, where they will ensure partial oxidation of a methane feed, to generate syngas again. Syngas generated thus, in both the electrodes is a valuable feedstock for a range of chemicals/ fuels like Methanol, and Fischer Tropsch liquids (potentially Sustainable Aviation Fuels).
Preliminary data on construction of button cells, their performance, and the usage of a Probostat testing unit is presented in this work. Some Aspen Plus simulations illustrating the overall process flow diagram for a Power to X, are also carried out, that show the feasibility of such a process.
Original language | English |
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Pages | 137-137 |
Number of pages | 1 |
Publication status | Published - 12 Sept 2024 |
Event | Electrochem2024 - Manchester Metropolitan University, Manchester, United Kingdom Duration: 11 Sept 2024 → 13 Sept 2024 https://www.rsc.org/events/detail/79233/electrochem2024 |
Conference
Conference | Electrochem2024 |
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Country/Territory | United Kingdom |
City | Manchester |
Period | 11/09/24 → 13/09/24 |
Internet address |