Methanol-to-Jet Is Approved. The Next Unlock Is Upstream.
June 24, 2026
Author note before publication: Honeywell announced in June 2026 that ASTM had qualified methanol-to-jet (MTJ). The qualification applies to the MTJ route and to methanol as a feedstock for SPK, not to Honeywell's proprietary process alone; Honeywell announced the milestone and commercializes one implementation through eFining. Two specifics still rest on the ASTM work item, not the published standard, and should be checked against the final revision: methanol's placement in Annex A5 and the 50 percent blend limit. Cost-competitiveness figures are attributed to Argus's 2026 MTJ outlook. The lifecycle and performance figures from Honeywell, Johnson Matthey, and ExxonMobil use different system boundaries and are presented as such, not as a like-for-like comparison.
Honeywell 's June 2026 announcement confirmed that methanol-to-jet has cleared a major ASTM milestone, and the qualification applies to the route and to methanol as a feedstock, not necessarily to one company's process. Methanol is now qualified for alcohol-to-jet synthetic paraffinic kerosene, with the public ASTM work item supporting its inclusion in Annex A5 at that annex's 50 percent blend limit. It becomes the third alcohol the standard recognizes for SPK, alongside ethanol and isobutanol, which folds an established methanol industry into a qualification framework that airlines and engine makers already trust.
The technical effort began years earlier. ExxonMobil spearheaded the pathway evaluation and produced more than 100 gallons of fuel component at its Machelen pilot in Belgium for ASTM D4054 testing. Honeywell UOP has since become the most visible commercial provider through eFining, reporting for one configuration, using green hydrogen and biogenic CO2, a lifecycle greenhouse-gas reduction of about 88 percent against conventional jet, a figure for a specific configuration, not a general pathway value. Topsoe , Johnson Matthey, Metafuels, and others are developing competing or complementary configurations. The approval broadens the licensor landscape instead of crowning one supplier.
What the approval settles is the technical question. MTJ makes on-specification jet fuel and now has a recognized fuel-quality route as a blending component, though scale-up, plant performance, and project economics remain project-specific. What it does not settle sits upstream. With the chemistry de-risked, the decisions that will determine whether MTJ becomes meaningful supply now lie in feedstock, certification, and life-cycle accounting, and the stakes are large: Honeywell and others see required SAF output climbing from roughly 40,000 barrels per stream day in 2025 toward 400,000 by 2035 if mandates hold, a step-change the lipid-based feedstock base is unlikely to meet alone. That is where this piece spends its time.
Where MTJ fits
With methanol qualified inside the alcohol-to-jet family, MTJ occupies a distinctive position. It shares the upgrading logic and the SPK product with the ethanol and isobutanol routes, and it reaches directly into the C1 and syngas economy through established methanol synthesis. Ethanol can reach many of the same carbon sources through fermentation, as gas-fermentation work like LanzaTech's shows, so the link to captured carbon is not unique to methanol. Methanol's real edge is that it can be made directly from C1 carbon without carbon-carbon coupling at the synthesis step, which keeps that step in well-established thermocatalytic production and leaves the carbon assembly to the downstream methanol-to-olefins and oligomerization stages. As a liquid it can be stored, shipped, and aggregated where raw biomass, hydrogen, or dilute CO2 cannot. And methanol-to-olefins chemistry yields a broader olefin slate than ethanol dehydration, giving flexibility to build the iso-paraffins a jet cut needs. The honest summary is that the C1 story is shared with ethanol, and methanol's advantage is the combination of simpler synthesis, liquid logistics, and downstream flexibility, on top of a global methanol-to-olefins base that already exists.
What the yield numbers tell a developer
The yield question has one purpose: to establish how much of an expensive, certified alcohol becomes the jet-range product that earns the aviation premium. Everything upstream is cost, and anything that misses the jet cut is either a coproduct to monetize or a loss to finance.
Start with stoichiometry, not commercial yield. One kilogram of methanol can in principle provide about 0.44 kilograms of hydrocarbon skeleton once oxygen leaves as water, against about 0.61 for ethanol, so ethanol carries roughly 39 percent more potential hydrocarbon mass per kilogram. The conclusion is narrow but useful: methanol holds no inherent mass-yield advantage, so its case rests on synthesis simplicity, sourcing flexibility, logistics, and downstream chemistry, not on stoichiometry.
Beyond theory, the commercial numbers are not yet standardized. Published ethanol-upgrading work shows that yield is a major lever on conversion cost, with modeled unit cost rising sharply as liquid yield falls. For MTJ itself the public indicators come mostly from technology providers, on different system boundaries that do not compare directly: Johnson Matthey's roughly 98 percent carbon-and-hydrogen efficiency for its CO2-to-methanol step, a claimed 30 percent utility saving for an integrated Honeywell configuration, and ExxonMobil's expectation of a favorable jet yield. None is a standardized accounting of methanol carbon in versus ASTM-qualified jet carbon out.
That accounting is what a buyer should demand: a credible technology package discloses methanol conversion, jet-range yield, naphtha and diesel and light-gas coproduction, carbon lost to coke and purge, recycle, hydrogen, and energy use. That balance is what turns chemistry into a plant size, an offtake price, and a bankable financing case.
Coproducts also deserve more than a line, (a light shoutout) because they may decide the overall economics project. Methanol-to-olefins chemistry is at root a route to light olefins, so an MTJ plant tuned for jet still makes propylene, naphtha, and heavier fractions with real petrochemical value. For an integrated operator the question is whether those streams are recycled into jet, upgraded further, or sold as coproducts, and whether their credits, more than the jet premium, carry part of the margin. The answer depends on licensor design and operating configuration, which is why the whole slate, not the jet cut alone, is what gets underwritten.
How MTJ sits among the approved pathways
Methanol now sits in the alcohol-to-jet family, so MTJ joins HEFA, Fischer-Tropsch, and the ethanol and isobutanol routes it shares a specification with. The useful comparison is not against all of them at once.
HEFA is the mature incumbent, constrained by lipid supply, and it is not the pathway MTJ is measured against. Crop and cellulosic ATJ rest on a large existing ethanol base, with a carbon intensity that varies by production system and should not be judged by label alone. Ethanol-based ATJ now shares the annex with methanol-based MTJ, and the two simply draw on different feedstock bases: ethanol from agriculture and waste gas, methanol from C1 and captured carbon.
The comparison that matters is with Fischer-Tropsch power-to-liquid, because e-methanol MTJ and FT-PtL draw on the same biogenic CO2 and renewable hydrogen and serve the same synthetic-fuel demand. The honest tension is efficiency. Both routes have several synthesis and upgrading stages, but inserting methanol synthesis and then reconverting it generally costs some efficiency and capital against a more direct FT route. What MTJ buys for that penalty is a storable, tradable liquid that can be made in one place and upgraded in another, valuable where low-cost methanol is stranded, where a hub can aggregate supply, or where capital is best phased. FT also brings maturity and, for some feedstock combinations, an existing CORSIA default. Which side wins is configuration-specific, and it should be settled with numbers.
A blending component, not a finished fuel
The approved product is a synthetic paraffinic kerosene, and neat SPK lacks the full aromatic and compositional profile for unrestricted use, so MTJ-SPK is blended into conventional jet within the usual limits on aromatics, density, freezing point, and energy content. That places it in the same commercialization model as the other SPK pathways. Work in the alcohol-to-jet space on aromatic-containing fuels, including Swedish Biofuels, suggests compositional reach can grow over time, but the discussion today is best anchored on MTJ-SPK as a blending component.
The commercial test begins with feedstock
The commercial test begins with feedstock, because the production route sets delivered cost, carbon intensity, and market eligibility at once.
E-methanol combines renewable hydrogen with eligible CO2, and its economics turn mostly on electricity and hydrogen cost and plant utilization. A compliant low carbon intensity is itself contingent, because RFNBO status depends on renewable-electricity additionality rules and on the eligibility of the CO2 source, with industrial CO2 facing eligibility windows under RED that tighten this decade. Denmark's Kassø plant, at up to 42,000 tonnes a year, ISCC-certified and already supplying A.P. Moller - Maersk, the LEGO Group, and Novo Nordisk, shows both that certified e-methanol is real and that its early volumes are being used by shipping and industry.
Biomethanol gasifies forestry or agricultural residues, municipal waste, or other biomass into syngas and then methanol, carrying the familiar gasification risks around contaminants, syngas conditioning, and uptime. Argus's 2026 analysis places biomethanol-based MTJ among the lower-cost emerging SAF pathways in its modeled scenarios, ahead of FT and advanced ATJ, with MTJ's higher capital intensity offset by higher yields, and integration with methanol, hydrogen, utilities, or port infrastructure. Under supportive policy, it is projected that integrated biomethanol-MTJ plants could approach fossil-jet production-cost parity around 2040.
Recycled-carbon methanol from waste gases or municipal waste can be viable too, with its value resting on how the carbon source is treated under CORSIA, RED, and national rules. China, for its part, holds the world's deepest base in gasification, methanol, and methanol-to-olefins, though much of it is coal-derived and does not meet the low-carbon-intensity bar, so that experience should not be confused with low-CI eligibility. The know-how is real: Jilin Connell has a planned MTJ facility built on its existing methanol-to-olefins operation, at a stated 280,000 tonnes a year, which will test whether existing MTO infrastructure can cut execution time, capital, or operating cost at scale.
The magnitudes are large enough to shape the case. Drawing on Methanex and IRENA estimates compiled by C&EN, conventional methanol costs roughly 350 to 450 dollars a tonne to produce, biomethanol roughly 455 to 1,000, and e-methanol from biogenic CO2 roughly 820 to 1,620, with direct air capture higher still, the gap driven largely by hydrogen and power. These are production-cost estimates, not delivered prices, and they vary with location and utilization, but the point is hard to miss: MTJ economics start from a feedstock that can already cost several times conventional methanol, before jet conversion, certification, blending, and delivery are added. The pathway works only where the policy-supported value of the finished SAF covers that whole stack.
The demand that justifies the conversion
The demand that makes that math work is the policy-supported synthetic-fuel obligation. ReFuelEU Aviation sets an e-fuel sub-mandate beginning at 1.2 percent in 2030 and rising, and the UK SAF Mandate carries a parallel power-to-liquid obligation now under review. These create buyers that must source synthetic fuel and cannot satisfy it with lipids, advanced biofuels, or second generation alcohol, which is the pull that justifies converting methanol into jet. Eligibility is not automatic from being synthetic: an e-methanol MTJ fuel still has to meet the applicable RFNBO rules on hydrogen, electricity, carbon source, and certification. With that caveat, the strongest commercial thesis for MTJ, to my mind, is built on this obligation first and the technical merits second, because the obligation supports the price that makes the merits bankable.
Two cautions belong with that: a mandate supports a price but also anchors its ceiling near the buy-out or penalty a supplier can pay instead of complying, though scarcity and strategic value move actual prices around that benchmark, so the premium is policy-shaped, not unbounded. And the obligation is only as durable as the politics behind it: the UK mandate is under review and the United States trimmed its SAF credit in 2025, so any long-lived asset has to treat policy durability, not just today's level, as a first-order risk.
Certification and policy eligibility
None of this should be confused with the ASTM stamp. Fuel qualification establishes that MTJ is safe and fit to fly; policy eligibility is a separate test resting on feedstock classification, a lifecycle carbon-intensity threshold, and in some programs an explicit pathway registration. CORSIA is the clearest case. Methanol's place in the alcohol-to-jet annex does not hand MTJ the carbon-intensity treatment the ethanol and isobutanol routes carry, and ICAO's current defaults include no methanol-MTJ value, yet. A producer can instead use an actual value, calculated under the ICAO methodology and verified through a scheme such as ISCC, spanning the whole chain from carbon source to uplift. Because FT already has defaults for some feedstock combinations, MTJ's likely reliance on an actual value, which takes more project-specific data and verification, is a genuine timing and financeability difference, and one worth designing in from the start.
The incentive frameworks split along the same line. The technology-neutral, carbon-intensity-based programs generally accommodate a new pathway without naming it. US 45Z, running through 2029, sets its credit by lifecycle emissions through the GREET model or CORSIA values; for now it mostly rewards the mature HEFA and ethanol routes, and its North American feedstock requirement would apply to MTJ as to any pathway. The UK Mandate and ReFuelEU work in the same spirit, asking for an eligible feedstock, a fuel inside a recognized standard, and a lifecycle reduction above their thresholds, with RFNBOs like e-methanol MTJ held to a 70 percent cut against the fossil comparator. The exception is the US Renewable Fuel Standard, which defines a pathway as a specific feedstock, process, and fuel combination and grants RINs only after the EPA approves it and assigns a D-code, so an ASTM-qualified MTJ fuel still needs its own RFS pathway. The thresholds differ enough that the same fuel can clear one market and miss another, so a developer certifies against whichever framework its offtaker is obligated under, and in the technology-neutral programs the real work is documenting a defensible carbon intensity, which loops back to feedstock and life-cycle accounting.
Integration versus merchant supply
Sustainable methanol has eager buyers already. Shipping can burn it directly, pulled by IMO rules and FuelEU Maritime, and chemicals can use it with no conversion at all. Aviation adds a conversion step, which makes it the higher-cost user of the same feedstock. That is the competitive reality MTJ works within.
The investment implication is conditional, and worth stating plainly because two ideas can seem to pull against each other. MTJ's distinctive feature is that methanol is tradable, which makes a decoupled model possible, producing methanol in one place and upgrading it in another, what Honeywell calls separating feedstock production from fuel conversion. That decoupling earns its keep with stranded or cheap methanol, a port or hub that aggregates supply, a repurposed methanol-to-olefins base, or phased capital. Where none of those holds, the dominant risk is merchant-methanol price exposure, and integrating CO2, hydrogen, methanol synthesis, logistics, and offtake gives more control. So neither model always wins: decoupling wins where it removes a real constraint, and integration is the safer base case otherwise. The announced pipeline leans toward integration, with Power2X planning a Rotterdam facility above 250,000 tonnes a year of e-SAF on imported green methanol and eFining, and Verso Energy planning a standardized eFining design across seven projects in Europe and the United States.
That pipeline is worth keeping in proportion. Most of it sits at feasibility or pre-feasibility stage, and even fully built, roughly 1.8 million tonnes a year is a small slice of global jet demand and only part of the SAF the sector is targeting for the 2030s. MTJ is a meaningful contributing pathway, not the whole answer, and saying so plainly is more useful than implying otherwise.
What to underwrite, and what comes next
For anyone underwriting MTJ, the questions follow from all this: who controls the methanol and what sets its delivered cost, what carbon intensity can be certified and how long that takes, which obligation supports the price, and which customer can pay it. Offtake can be built to carry those risks directly, through methanol-indexed pricing, carbon-intensity-linked premiums, certification conditions precedent, hydrogen or power collars, coproduct sharing, and feedstock substitution rights. Drafting those terms well is how a qualified pathway becomes a financeable one.
MTJ has cleared the technical bar and arrived with a real provider ecosystem. Whether it becomes supply at scale now turns on the upstream work, not the reactor, and integration looks to me like the surest way to line up the pieces. I hold that with conviction where the evidence is settled and humility where it is not, since the standardized numbers that would close the debate are still being built. For those building, financing, or certifying MTJ, which constraint binds first: feedstock, conversion yield, certification, or competing demand from shipping and chemicals? The pathway is approved, and the more interesting work begins now.
