Making Fuel From Waste Methane and Carbon Dioxide A Long Running Dry Reforming Process

This application covers a method and a device for producing useful hydrocarbons such as liquefied petroleum gas from two feedstocks that are cheap, widely available and otherwise problematic: methane-containing gas and carbon dioxide. The applicant is Furukawa Electric Co., Ltd., one of Japan’s oldest industrial groups.

The Problem

Most of the hydrocarbons that industry runs on, the lower olefins and aromatics that feed the chemical sector, along with petrol, LPG and aviation fuel, come from oil. That creates two separate difficulties. Oil is concentrated in a handful of countries, so supply carries geopolitical risk for a nation like Japan that imports nearly all of it. And burning or processing those hydrocarbons releases large volumes of carbon dioxide.

Renewable energy is the usual answer, but it produces electricity, and electricity is awkward to move and store when transmission capacity is limited. Biogas generation from livestock manure and sewage sludge illustrates the gap neatly. The process yields a mixture of methane and carbon dioxide, and conventional plants burn only the methane. The carbon dioxide fraction is vented, which rather undercuts the environmental case.

There is also a durability problem specific to the chemistry involved. Converting methane and carbon dioxide into synthesis gas is well known, but the catalysts that do it tend to accumulate carbon deposits and lose activity, so processes that look good in a laboratory run poorly over months of continuous operation.

What This Invention Does

The method starts with a dry reforming step. A mixed gas containing methane-bearing hydrocarbon and carbon dioxide is reacted to generate a first gas of carbon monoxide and hydrogen, which is the synthesis gas that downstream chemistry needs. That synthesis gas is then converted into the target hydrocarbons, products with two or more carbon atoms including lower olefins, aromatics and liquefied petroleum gas.

What distinguishes the disclosure from the general concept of dry reforming is the emphasis on producing efficiently over a long period. The specification sets out the operating relationships and device configuration intended to keep conversion stable rather than letting output decay as deposits build on the catalyst. The production device pairs a reforming section with the downstream synthesis section and the gas handling between them.

Because both inputs can come from a biogas stream, the process can take the whole output of an anaerobic digester rather than the methane half, and turn it into a liquid fuel that can be stored in a tank and carried on a truck.

Key Features

• Dry reforming step. A mixed gas of methane-containing hydrocarbon and carbon dioxide is reformed into a first gas of carbon monoxide and hydrogen.
• Useful hydrocarbon synthesis. The synthesis gas is converted into hydrocarbons of carbon number two or higher, including lower olefins and liquefied petroleum gas.
• Carbon dioxide as feedstock. Carbon dioxide is consumed as a raw material rather than vented, which suits biogas streams where it makes up a large fraction.
• Long run stability. The process conditions and device configuration are directed at maintaining efficient production over extended operation.
• Feedstock flexibility. Source materials are not restricted to conventional oil and gas reserves, which loosens the dependence on specific producing regions.
• Integrated production device. The apparatus claims cover the reforming and synthesis sections together with the gas handling between them.

Who Is Behind It

The applicant is Furukawa Electric Co., Ltd., a Tokyo listed industrial group founded in 1884 with businesses spanning optical fibre, automotive components, electronics materials and energy infrastructure. The named inventors are Yuki Kawamata, Takashi Fujikawa, Masayuki Fukushima, Yuichiro Banba, Tomohiko Mori and Yuki Iwano. The application is a divisional of Australian application 2022248671.

Why It Matters

The phrase that gets used for this class of technology is carbon capture and utilisation, and it occupies an unusual position in climate policy. Unlike storage, which puts carbon dioxide underground and produces nothing, utilisation makes a saleable product, which means it can potentially pay for itself. The catch has always been that the chemistry is energy hungry and the catalysts degrade.

Japan has a particular interest here. It imports almost all of its fossil fuel and has committed to net zero by 2050, so a route from domestic waste streams to liquid fuel is strategically attractive rather than merely environmentally tidy. Anaerobic digesters at farms and sewage plants already produce the exact gas mixture this process wants, and they currently throw half of it away.

Whether any of this reaches commercial scale depends on economics that patents do not settle. Dry reforming has been studied for decades without displacing steam reforming, largely on catalyst life. A disclosure focused specifically on producing efficiently over a long period is at least aimed at the right obstacle.

Related Concepts

• Dry reforming of methane – the core reaction that turns methane and carbon dioxide into synthesis gas.
• Syngas – the carbon monoxide and hydrogen mixture that feeds the second stage.
• Fischer-Tropsch process – the classic route from synthesis gas to liquid hydrocarbons.
• Carbon capture and utilisation – the broader field of making products from captured carbon dioxide.
• Biogas – the waste derived methane and carbon dioxide stream this process can consume whole.
• Catalyst deactivation – the coking and poisoning problem that limits dry reforming in practice.

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AU 2026202064 was published in the Australian Official Journal of Patents on 9 April 2026 and is open for public inspection. Patent applications represent inventions that are sought to be protected and do not necessarily reflect commercially available products.