In a facility in Hallam, Nebraska, a company called Monolith has been doing something that most hydrogen producers do not: splitting methane into hydrogen and solid carbon, without releasing carbon dioxide into the atmosphere. Their Olive Creek 1 plant, commissioned in 2020, produces 5,000 tons of hydrogen and 15,000 tons of carbon black annually using plasma-heated methane pyrolysis powered by renewable electricity. The carbon black goes to tire manufacturers — Goodyear announced it would use Monolith’s material in its ElectricDrive GT tires. The hydrogen goes to ammonia production for agricultural fertilizer.
Monolith’s plant is the world’s first commercial-scale methane pyrolysis facility. It demonstrates, at operational rather than laboratory scale, the core proposition of turquoise hydrogen: that methane — the primary component of natural gas, with its vast existing extraction and pipeline infrastructure — can be converted to hydrogen without emitting CO₂ as a gas, by instead producing solid carbon that can be sold, used, or permanently stored.
The Hydrogen Color Spectrum
The hydrogen industry has developed a color-coded taxonomy that reflects the climate credentials of different production methods. Gray hydrogen is produced from natural gas via steam methane reforming (SMR), releasing 9 to 12 kilograms of CO₂ per kilogram of hydrogen — the dominant production method today, accounting for roughly 95 percent of global supply. Blue hydrogen is the same SMR process but with carbon capture and storage attached, reducing but not eliminating emissions. Green hydrogen is produced by electrolysis of water using renewable electricity — zero direct emissions, but currently expensive and dependent on electrolyzer capacity that is still scaling rapidly.
Turquoise hydrogen occupies a distinct position in this spectrum. Like blue hydrogen, it uses methane as feedstock. Unlike blue hydrogen, it does not produce CO₂ at all during the core reaction. The methane is pyrolyzed — thermally decomposed — into hydrogen gas and solid carbon in the reaction CH₄ → C + 2H₂. No oxygen is involved, so no CO₂ is formed. The solid carbon is a product, not a waste stream requiring expensive geological storage. When the process heat is supplied by renewable electricity, turquoise hydrogen can achieve near-zero carbon intensity comparable to green hydrogen, with energy requirements as low as 7 to 12 kilowatt-hours per kilogram of hydrogen — competitive with electrolysis at equivalent renewable electricity prices.
The critical caveat is methane leakage. If natural gas is used as feedstock and significant amounts escape unburned into the atmosphere during extraction and transport — methane is a potent greenhouse gas — the lifecycle emissions of turquoise hydrogen can be worse than blue hydrogen despite the absence of process CO₂. This makes feedstock sourcing and methane leakage monitoring critical determinants of the actual climate benefit.
The Process Technologies
Methane pyrolysis is not a single technology but a family of approaches that differ in how they deliver the heat required to decompose methane, and in what catalyst (if any) they use. The temperature, catalyst choice, and process conditions determine the quality and type of solid carbon produced — a variable with enormous economic consequences.
Plasma pyrolysis, used by Monolith, superheats methane to approximately 1,650 degrees Celsius using electrical plasma. At this temperature, methane decomposes rapidly into hydrogen and carbon black — finely divided carbon particles with properties similar to those produced by conventional carbon black manufacturing from petroleum. Carbon black is a commodity material with a $15 billion global market, used primarily in tires, rubber products, and printing inks. Monolith’s carbon black commands a premium because it is produced from a clean process rather than petroleum combustion.
Catalytic pyrolysis introduces catalysts — typically nickel, cobalt, or iron-based materials — that enable methane decomposition at lower temperatures of 600 to 900 degrees Celsius, reducing energy requirements. Hazer Group uses iron ore pellets as a low-cost catalyst in a fluidized bed reactor, producing graphite rather than carbon black. Graphite commands higher prices than carbon black and has a growing market in lithium-ion battery anodes — a strategically important application given battery supply chain pressure. Hazer’s commercial demonstration plant in Perth, Australia achieved first production of hydrogen and graphite in January 2024 and is now ramping up toward continuous commercial operation.
The carbon product hierarchy from pyrolysis is significant: carbon black sells for roughly $1,000 to $2,000 per ton, graphite for $2,000 to $10,000 per ton, and carbon nanotubes — which can be produced using metal catalysts at specific temperature ranges — for potentially $100,000 per ton or more. Huntsman’s Miralon process specifically targets carbon nanotube production alongside hydrogen, positioning the hydrogen as a co-product of a primarily carbon nanomaterial business. This value hierarchy means that different pyrolysis approaches effectively occupy different economic niches.
The Carbon Co-Product Challenge
Every kilogram of hydrogen produced by methane pyrolysis generates approximately three kilograms of solid carbon. At commercial scale, this creates a substantial volume of material that must find markets. A plant producing 60,000 tons of hydrogen per year — the scale of Monolith’s Olive Creek 2 expansion — simultaneously produces 180,000 tons of carbon black annually.
This is where the economics of turquoise hydrogen become most complex. Carbon black and graphite markets exist and are large, but they are not unlimited. If methane pyrolysis scales significantly, the supply of carbon co-product could exceed demand for existing applications, driving prices down and undermining the economic case for the hydrogen. One strategic response is to develop new applications for the carbon output — using it as a soil amendment for carbon sequestration, as a building material additive, or as a precursor for higher-value carbon materials. Another is to permanently store low-grade carbon in geological formations, analogous to carbon capture and storage for CO₂ — though the economics of paying for carbon disposal rather than selling it change the hydrogen cost significantly.
In November 2025, ExxonMobil and BASF announced plans to co-develop thermal methane pyrolysis and construct a demonstration plant in Baytown, Texas — the entry of major industrial players that signals growing institutional confidence in the technology’s commercial potential. Hazer Group formed a strategic alliance with engineering firm KBR in May 2025 to scale up its iron-ore catalytic process for commercial deployment.
What Remains Unresolved
Catalyst deactivation is the principal technical challenge for catalytic approaches: carbon depositing on catalyst surfaces reduces activity over time, requiring catalyst regeneration or replacement that adds cost and operational complexity. For plasma approaches, the energy cost of generating high-temperature plasma is substantial, and the economics depend sensitively on renewable electricity prices and availability. Regulatory frameworks for certifying turquoise hydrogen’s climate credentials — particularly the accounting for methane leakage and carbon product permanence — are still being developed by standards bodies and governments. The question of whether the solid carbon qualifies as permanent carbon sequestration, and under what conditions, significantly affects the lifecycle greenhouse gas accounting and the eligibility of turquoise hydrogen for clean hydrogen incentives.
Why It Matters
The hydrogen economy cannot be built on green hydrogen alone at the pace the energy transition requires. Electrolysis capacity is scaling, but slowly; renewable electricity is still insufficient to power large-scale green hydrogen production without displacing other renewable uses; and green hydrogen costs are still substantially above gray hydrogen in most markets. Turquoise hydrogen offers a bridge: lower emissions than gray, lower cost than green in many contexts, compatible with existing natural gas infrastructure, and producing solid carbon that has commercial value rather than requiring disposal. Its scaling limitations are real but surmountable, and the entry of ExxonMobil, BASF, and KBR into the field suggests that industrial capital is beginning to treat those limitations as engineering problems rather than fundamental barriers.
Closing Human Dimension
Natural gas has been the workhorse of global energy for decades — reliable, dense, cheap, and connected to nearly every industrial facility and population center in the developed world through infrastructure built over a century. The environmental problem with natural gas is specific: burning it releases the carbon that methane contains into the atmosphere as CO₂. Methane pyrolysis addresses that problem not by capturing CO₂ after it is formed, but by preventing its formation in the first place — keeping the carbon solid, selling it as a useful material, and delivering the hydrogen as a clean energy carrier. The pipeline that carried methane to the plant becomes the infrastructure for a cleaner energy system, and the carbon that would have become pollution becomes a tire or a battery electrode instead.
Sources
1. Chemical Engineering. “Commercial Progress on Turquoise Hydrogen.” (May 2024). https://www.chemengonline.com/fullscreen/commercial-progress-on-turquoise-hydrogen/
2. Chemical Engineering. “Hydrogen Production via Methane Pyrolysis: An Overview of Turquoise H2.” https://www.chemengonline.com/fullscreen/hydrogen-production-via-methane-pyrolysis-an-overview-of-turquoise-h2/
3. IDTechEx. “Methane Pyrolysis: Unlocking the Potential of Turquoise Hydrogen.” (June 2023). https://www.idtechex.com/en/research-article/methane-pyrolysis-unlocking-the-potential-of-turquoise-hydrogen/29395
4. AJOT.com / IDTechEx. “How methane pyrolysis is powering turquoise hydrogen.” (March 2026). https://www.ajot.com/news/how-methane-pyrolysis-is-powering-turquoise-hydrogen — documents ExxonMobil/BASF announcement and Hazer/KBR partnership.
5. Digital Refining. “Turquoise hydrogen production by methane pyrolysis.” https://www.digitalrefining.com/article/1002720/turquoise-hydrogen-production-by-methane-pyrolysis — documents Monolith plasma process and Hazer iron-ore catalytic process.
6. RNG Strategy Consulting. “Methane Pyrolysis: Strategic Pathway to Low-Emission Hydrogen.” (November 2025). https://rngstrategyconsulting.com/insights/industry/energy-resources/methane-pyrolysis-turquoise-hydrogen-market-strategy/
7. LinkedIn / Vepsäläinen. “Turquoise Hydrogen Scales Up to Commerciality.” (February 2024). https://www.linkedin.com/pulse/turquoise-hydrogen-scales-up-commerciality
Idea generated by Grok. Article expanded with Grok, substantially rewritten with Claude Sonnet 4.6. Published at artificialideas.org.
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