Journal
C-JOURNAL OF CARBON RESEARCH
Volume 6, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/c6030055
Keywords
CCU; CO2 utilization; electrofuels; power-to-fuels; synfuels; reforming; rWGS; POX; resistance heating; Fischer-Tropsch
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Funding
- VTT Technical Research Centre of Finland Ltd.
- H2020 project ICO2CHEM [768543]
- H2020 Societal Challenges Programme [768543] Funding Source: H2020 Societal Challenges Programme
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We compare different approaches for the preparation of carbon monoxide-rich synthesis gas (syngas) for Fischer-Tropsch (FT) synthesis from carbon dioxide (CO2) using a self-consistent design and process simulation framework. Three alternative methods for suppling heat to the syngas preparation step are investigated, namely: allothermal from combustion (COMB), autothermal from partial oxidation (POX) and autothermal from electric resistance (ER) heating. In addition, two alternative design approaches for the syngas preparation step are investigated, namely: once-through (OT) and recycle (RC). The combination of these alternatives gives six basic configurations, each characterized by distinctive plant designs that have been individually modelled and analyzed. Carbon efficiencies (from CO(2)to FT syncrude) are 50-55% for the OT designs and 65-89% for the RC designs, depending on the heat supply method. Thermal efficiencies (from electricity to FT syncrude) are 33-41% for configurations when using low temperature electrolyzer, and 48-59% when using high temperature electrolyzer. Of the RC designs, both the highest carbon efficiency and thermal efficiency was observed for the ER configuration, followed by POX and COMB configurations.
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