There are several technologies that have proven successful in laboratories or pilot projects. A handful of companies are building or planning commercial‑scale plants.
Some of these technologies and companies are:
Plasma‑arc Pyrolysis
High Temperature Technologies Corp. uses a plasma arc torch incorporating gas or steam and metal electrodes (copper, tungsten, hafnium, zirconium, etc.) to create plasma, which is an ionized gas. The torch can reach temperatures in the range of 3 000–6 000 °C; at these temperatures molecular bonds break down through a process called molecular dissociation, producing basic elemental constituents. Plasma‑arc systems are also being trialed for difficult waste streams and specialty feedstocks, illustrating how high‑temperature electrified processes can complement lower‑temperature methane pyrolysis.
Monolith Materials built its first Olive Creek plant near Hallam, Nebraska, to produce low‑emission carbon black and hydrogen from natural gas. The facility has ramped up production of clean carbon black and is supplying tire and rubber manufacturers across North America, while planning the larger Olive Creek 2 expansion with US federal loan support. If fully built out, Monolith expects to cut lifecycle emissions by hundreds of thousands of tonnes of CO2 per year compared with conventional carbon black and ammonia production.
Ørsted, a leading offshore wind developer, and Yara, a major fertilizer producer, have been developing projects in which offshore wind electricity powers large electrolyzers to make renewable hydrogen for ammonia production. One flagship concept near Yara’s Sluiskil plant in the Netherlands would use a 100 MW electrolyzer to provide hydrogen for roughly 75 000 tonnes per year of so‑called “green” ammonia, displacing a portion of fossil‑based hydrogen. Parallel projects in Norway and other locations continue to test how quickly such integrated wind‑to‑hydrogen‑to‑ammonia value chains can scale.
2‑step Catalyst Bed
Hazer Group Limited is commercialising the HAZER® Process at its commercial demonstration plant in Munster, Western Australia. The process converts biogas or natural gas into hydrogen and synthetic graphite using an iron‑ore catalyst. By 2024 the plant had produced its first hydrogen and graphite, and Hazer is now working with partners to replicate the technology in new markets, positioning low‑emission hydrogen plus solid carbon co‑products as an alternative to conventional steam methane reforming.
Fluidized / Moving Bed & Thermal Processes
A consortium of BASF, Linde, ThyssenKrupp and others has investigated high‑temperature reactors that decompose hydrocarbons to hydrogen while capturing carbon in solid form, then recombine hydrogen with captured CO2 to make synthesis gas (syngas) for chemicals. Early pilot projects demonstrated technical feasibility but also highlighted engineering complexity and cost challenges. Work on CO2-to‑syngas chemistry continues in Europe and elsewhere as part of broader efforts to reuse captured CO2 in existing industrial value chains.
Liquid Metal or Salt Bubble Reactors
C-Zero, now rebranded under a new graphite-focused entity, Graphitic Energy, has pivoted from turquoise hydrogen toward commercial graphite production using methane pyrolysis. The company has shifted its development efforts to Texas, where it is establishing facilities aimed at producing high-purity graphite for batteries and industrial markets. The methane-cracking process remains similar, but the emphasis is now on the solid-carbon product rather than hydrogen. It is reasonable to infer that this pivot may have been influenced by the shifting U.S. federal funding landscape—particularly the rollback of clean-energy grants during the Trump administration—where positioning the company as a graphite supplier likely preserved access to materials-science and advanced-manufacturing funding streams.
Microwave
Atlantic Hydrogen Inc. developed its proprietary CarbonSaver™ technology to direct high‑power microwaves at its reactors, ionizing natural gas, splitting methane into carbon and hydrogen, and aiming to capture the carbon as a saleable solid. The company built a field‑scale demonstration plant in New Brunswick, Canada, but ultimately entered bankruptcy before full commercial deployment — a reminder that promising low‑carbon hydrogen technologies must still overcome financing, policy and market hurdles.
The image above is the AHI plant in New Brunswick, Canada. The grand opening of Atlantic Hydrogen’s CarbonSaver™ Field Demonstration Plant was to take place in 2014. The company had developed an efficient, non‑polluting method of extracting hydrogen from the methane in natural gas.
While individual methane‑pyrolysis projects advance, governments and industry are also building the wider hydrogen infrastructure that any of these technologies would eventually rely on.
European Hydrogen Pipelines
Across Europe, the European Hydrogen Backbone initiative brings together gas network operators who are planning tens of thousands of kilometres of hydrogen pipelines by repurposing existing natural‑gas lines and adding new corridors where needed. Recent briefings suggest that more than 50 000 km of hydrogen pipelines and associated import terminals are at various stages of planning, though many projects still await final investment decisions and regulatory clarity.
Germany has approved a national hydrogen “core grid” that should see the first hydrogen flowing through dedicated pipelines from 2025 onward, with a target network of roughly 9 000 km by the early 2030s linking ports, industrial clusters and storage sites. Other projects, such as the H2Med corridor connecting the Iberian Peninsula to France and central Europe, and the SoutH2 corridor linking North Africa to Italy, Austria and Germany, have received EU backing but are now generally expected to enter service in the early 2030s rather than by 2030 as initially hoped.
Hydrogen Pipelines in the UK
In the United Kingdom, regional initiatives such as the HyNet North West Hydrogen Pipeline are advancing engineering and permitting for new pipelines that would carry low‑carbon hydrogen from production hubs to nearby industrial users. At the national level, the UK government is developing business models and regulatory frameworks for transport and storage infrastructure, and has temporarily relaxed some licensing requirements for 100% hydrogen pilot pipelines to accelerate early projects. Proposals for a future national hydrogen transmission network, partly re‑using existing gas mains, continue to evolve as policy and market signals firm up.
Hydrogen Events and Conferences
Hydrogen has also become a regular feature of major energy conferences. In the UK, Hydrogen UK’s Annual Conference and other industry gatherings bring together project developers, network operators, policymakers and investors to discuss deployment barriers and opportunities. London and other European cities now host recurring international hydrogen summits, trade fairs and technical expos focused on everything from electrolyzers and storage to pipelines, industrial uses and power generation — evidence that low‑carbon hydrogen has moved from a niche topic to a central theme in energy‑transition planning.
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