Abstract
Sustainable aviation fuel (SAF) production from captured carbon dioxide and green hydrogen, is referred to as the key to decarbonize the hard-to-abate aviation sector. Fischer-Tropsch is a mature and reliable pathway for hydrocarbon synthesis, with a wide spectrum of technological options and high plant efficiency extending to more than 80 % of e-kerosene selectivity. In this work, an Aspen Hysys model, coupled with different Matlab simulations for Fischer-Tropsch, Hydrocracker and SOEC, was set up to estimate efficiency and selectivity. The results show that global efficiency is mainly linked to the efficiency of the production of H2. Energetic efficiency reaches 48.06 % using the already existing commercial electrolyte supported cell in a SOEC electrolyser, but it could increase to 65.74 % if cathode supported cell was considered.
| Original language | English |
|---|---|
| Pages (from-to) | 1160-1176 |
| Number of pages | 17 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 58 |
| DOIs | |
| Publication status | Published - 8 Mar 2024 |
Bibliographical note
Publisher Copyright:© 2024 The Authors
Funding
Table 1 presents in a non-exhaustive way, ASR and durability results at the stack level. For the energy analysis, values from Riedel et al. were chosen, in this publication the stacks have a low degradation over the period studied, moreover it has high performance for a stack composed of electrolyte supported cells. Finally, this stack is commercial. In order to compare an electrolyte-supported cell stack with a cathode-supported, values of Fang et al. and from Corre & Brisse were used. Jülich performance should be taken with precaution, as the stack is composed of only two cells, facilitating thermal management of the stack, the inlet flow has a H2O/H2 ratio equal to 1 potentially reducing the oxidation of the cell and increasing durability. Finally, this stack is not a commercial solution, therefore the result may not be reproducible. However, the high performance of this stack gives an indication of what the future performance of fuel cell supported stack could be achieved in the near future. Values from Corre & Brisse are more representative of performance of a current cathode supported stack, the ASR is lower than that of an electrolyte supported, but on the other hand the degradation rate is higher.The ASF selectivity was fitted by the authors of this publication using data from various sources with different Co catalysts (both promoted and unpromoted, and with different supports). The data was collected for temperatures ranging between 450 and 530 K and H2/CO ratios ranging between 1 and 3.
Keywords
- Carbon capture and utilisation
- Energy analysis
- Fischer-tropsch
- Hydrogen
- Power-to-fuels
- SOEC
- Synthetic fuels
