Power-to-Liquid SAF: The Long Game and the Near-Term Opportunity
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How engineering directors and plant owners should think about e-SAF, Power-to-Liquid economics, and when it makes sense to start a PtL pre-FEED today.
Key Takeaway
Power-to-Liquid is the only SAF pathway with no biogenic feedstock ceiling. It produces e-SAF from green hydrogen and captured CO2, achieving up to 99 percent lifecycle GHG reduction. The technology is proven at pilot scale. The barrier today is cost: e-SAF currently trades at roughly 13 times conventional jet fuel. For plant owners with access to cheap renewable electricity and a concentrated CO2 source, PtL is a credible long-term project that makes sense to start engineering today given the long lead time from pre-FEED to first production
What is Power-to-Liquid SAF?
Power-to-Liquid, often written PtL or PTL, produces liquid hydrocarbon fuels by combining green hydrogen with captured carbon dioxide. The process starts with water electrolysis using renewable electricity to produce hydrogen. That hydrogen is then combined with CO2 through either a methanol synthesis route or directly through Fischer-Tropsch synthesis to produce synthetic hydrocarbons that can be refined into SAF.
The resulting fuel is called e-SAF or e-kerosene, where the e stands for electro, reflecting its electricity-driven production route. It is certified under ASTM D7566 and qualifies as a separate sub-category under the EU ReFuelEU Aviation mandate, which requires a one percent e-SAF sub-mandate by 2030 rising to 35 percent by 2050.
The two main PtL Routes
Route | Steps | Technology Providers | Advantages |
Fischer-Tropsch (FT) route | Electrolysis to H2, reverse water-gas shift to produce CO + H2 syngas, FT synthesis, product upgrading | Sasol, Velocys, Ineratec, SUNFIRE | Proven FT chemistry; syngas flexibility; good SAF selectivity |
Methanol-to-Jet (MtJ) route | Electrolysis to H2, CO2 hydrogenation to methanol, methanol to olefins, olefin to jet | Haldor Topsoe, Carbon Recycling International, Oberon Fuels | Methanol intermediate is easier to store and transport; modular design options |
PtL SAF Production Cost: The honest numbers
Power-to-Liquid is currently the most expensive of the four SAF pathways by a significant margin. Understanding where the cost comes from is essential for any plant owner considering a PtL project.
5.00-5.30 | USD per kg. PtL e-SAF production cost in 2026, approximately 13x conventional jet fuel cost. Source: Argus, OIES December 2025. |
55-80% | Share of total PtL CAPEX typically attributable to the hydrogen production section (electrolyzer and associated balance of plant). Source: ScienceDirect March 2026. |
80% | Maximum share of PtL OPEX from electricity costs in high electricity price scenarios. Source: ScienceDirect March 2026. |
Route | Steps | Technology Providers |
Electricity for electrolysis | 50-60% | Below 40 USD per MWh renewable power; high capacity factor |
Electrolyzer capital cost | 15-20% | Scale and learning curve; PEM vs alkaline selection |
CO2 capture and delivery | 10-15% | Co-location with concentrated CO2 source |
FT synthesis or MtJ capital | 10-15% | Technology maturity improving; modular design reduces risk |
Fixed OPEX and overheads | 5-10% | Scale and operating efficiency |
Where PtL SAF Makes Engineering Sense Today
Location 1: West Texas and New Mexico
West Texas has some of the best renewable electricity resources in the world, with onshore wind and solar projects achieving power purchase agreements below 25 US dollars per MWh in recent auctions. Combined with the Gulf Coast's large industrial CO2 sources from chemical plants, refineries, and ethanol facilities within pipeline distance, this creates the best US geography for PtL SAF.
Location 2: Co-located with concentrated CO2 sources
CO2 capture is the second largest cost driver in a PtL plant. Projects co-located with industrial sources that produce nearly pure CO2 streams, such as ethanol fermentation plants, ammonia facilities, or natural gas processing plants, avoid the high cost of direct air capture and reduce the overall CO2 supply cost to 20 to 60 US dollars per tonne. This significantly improves overall PtL economics.
Location 3: As part of an integrated energy complex
Several Gulf Coast industrial clusters are exploring integrated energy hubs where a single renewable power supply and shared hydrogen infrastructure serves multiple offtakers including PtL SAF, green ammonia, green methanol, and industrial hydrogen supply. In this configuration, PtL SAF benefits from shared electrolyzer capital that is partially absorbed by other products.
RVN's capabilities in green hydrogen engineering and carbon capture design form the core of the PtL engineering scope. The Fischer-Tropsch synthesis section draws on RVN's FT process design experience.
What a PtL Pre-FEED Covers and how long it takes?
A PtL pre-FEED is the most complex of all four SAF pathways because it integrates three separate process islands: the hydrogen production island, the CO2 supply and conditioning system, and the synthesis island. A well-scoped pre-FEED takes 12 to 20 weeks and covers the following.
Renewable electricity supply assessment and power purchase agreement structure review.
Electrolyzer technology screening: proton exchange membrane versus alkaline versus solid oxide options.
CO2 source assessment and capture or delivery logistics.
Synthesis route selection: Fischer-Tropsch or methanol-to-jet.
Technology licensor identification and preliminary licensor engagement.
High level heat and material balance and utility assessment.
AACE Class 5 capital cost estimate for the full integrated complex.
The policy of PtL in 2026
Policy support for e-SAF is stronger in Europe than in the US today, but the US is building out its incentive framework.
EU ReFuelEU Aviation: mandates 1.2 percent e-SAF by 2030, rising to 35 percent by 2050. e-SAF produced outside the EU can qualify through a book-and-claim system.
UK RTFO: Renewable Transport Fuel Obligation certificates provide a subsidy stream for SAF production in the UK with additional support for e-SAF under a separate sub-target.
US 45Z: Clean Fuel Production Credits apply to SAF based on lifecycle carbon intensity. Low CI e-SAF from PtL qualifies for the maximum credit level of approximately 1.75 US dollars per gallon.
ICAO CORSIA: e-SAF qualifies under CORSIA emissions offsetting rules from its first production year, providing
Frequently Asked Questions
Is Power-to-Liquid SAF commercially available today?
Small volumes of e-SAF are available commercially, primarily from European producers including Ineratec and Nordic RIFT. However, no large commercial scale PtL plant is operational globally as of mid-2026. Most production is at pilot and demonstration scale, with the first commercial scale projects targeting startup in the 2028 to 2031 window.
How much renewable electricity does a PtL SAF plant need?
A PtL plant producing 100,000 tonnes of SAF per year requires approximately 3 to 4 terawatt hours of electricity annually, or roughly the equivalent of 1 to 1.5 gigawatts of dedicated wind or solar capacity with typical capacity factors. This is a very large power requirement and is one of the key reasons PtL is best suited to areas with abundant low-cost renewable resources.
What is the difference between e-SAF and bio-SAF
Bio-SAF uses biological feedstocks: waste fats, ethanol, or biomass. e-SAF uses electricity, water, and captured CO2. Both are certified as sustainable aviation fuel under ASTM D7566 standards. e-SAF typically achieves higher lifecycle GHG reductions and has no competition with food or land use, which is why it receives separate policy treatment in the EU and UK.
About Author: Ragavan Vaidyanathan is a Chemical Engineer (Ph.D., Auburn University) with 25+ years leading capital projects up to $3B TIC across Power, Petrochemical, Refining, and Renewable Fuels. Former Sr. Director of Process Engineering at Jacobs/Worley, he now leads RVN Inc., delivering high-value engineering solutions from Houston, TX. About RVN: RVN Inc. is a Houston-based engineering firm specializing in pre-FEED, FEED, detailed engineering, and AACE Class 3 cost estimation for capital projects across the Power, Petrochemical, Polymer, Refining, and Renewable Fuels industries. With a global network of high-value engineering centers, RVN delivers rigorous technical execution — from process design through commissioning — for clients navigating complex, large-scale energy transitions including Sustainable Aviation Fuel. 📩 To learn more or discuss your SAF project, contact us at admin@rvninc.com |
Sources
ScienceDirect. Comparative techno-economic assessment of CO2-based SAF pathways: FT, MtJ, and EtJ across three global regions. March 2026. sciencedirect.com
Argus / Energy Intelligence. e-SAF cost versus HEFA assessments. Late 2025. energyintel.com
Aviation Week. Is The Fuel Crisis A Catalyst For Europe's SAF Supply? May 2026. aviationweek.com
IATA. Finance Net Zero CO2 Emissions Roadmap. September 2024. iata.org
White and Case LLP. Sustainability Trends in Aviation 2026. April 2026. whitecase.com
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