CO2から化学品へ：フィッシャー・トロプシュ由来ナフサの軽質オレフィンの循環原料としての可能性評価

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides quantitative data on FT feedstock performance in steam cracking, useful for process design and carbon intensity modeling.

🏢実務担当者:Highlights potential for integrating CO2-derived feedstocks into existing petrochemical assets, informing investment decisions in CCU technologies.

🏛政策担当者:Supports policies promoting carbon capture and utilization as a decarbonization lever for the chemical industry.

Rising industrial CO₂ emissions and the limited capacity of current abatement technologies highlight the need for scalable carbon utilization pathways. Fischer-Tropsch synthesis provides a route to convert captured CO₂ into hydrocarbon feedstocks compatible with existing petrochemical processes, such as steam cracking. However, their suitability as steam cracker feedstocks has not yet been fully demonstrated. Three Fischer-Tropsch (FT)-derived feedstocks were generated from captured CO₂ via Reverse Water-Gas Shift followed by Fischer-Tropsch synthesis. The crude FT oil (i) was hydrotreated to produce hydrotreated FT oil (ii), and subsequent distillation yielded a hydrotreated FT naphtha (iii). The feedstocks were characterized using comprehensive two-dimensional gas chromatography, benchmarked against fossil naphtha in a bench-scale steam cracker, and evaluated for their impact on the carbon intensity of ethylene production. FT-derived feedstocks were highly paraffinic and contained negligible sulfur, nitrogen, halogens, and metals. Crude FT oil contained 11.7 wt% oxygenates and 11.3 wt% olefins, which were removed by hydrotreatment, yielding more stable steam cracker feedstocks. When steam-cracking the respective oils at 880 °C, the crude FT oil produced 38% more ethylene than fossil naphtha, while the yield of pyrolysis fuel oil (C10+) was halved. Further upgrading to hydrotreated FT naphtha increased the ethylene advantage to 48% and reduced pyrolysis fuel oil formation to one-third of that with fossil naphtha. The higher ethylene selectivity led to a 27% reduction in cracker-level CO₂ intensity compared with fossil naphtha. These results demonstrate that CO2-derived FT feedstocks can serve as clean, high-yield alternatives for light olefin production within existing petrochemical infrastructure.

• semanticscholar https://www.sciencedirect.com/science/article/pii/S2212982026002441/pdffirst seen 2026-09-05 05:41:49 · last seen 2026-09-22 05:06:25