By Allan Robinson
Updated Aug 30, 2022

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Methane (CH₄) is a colorless, odorless gas that constitutes the majority of natural gas. It is prized for its clean combustion and widespread availability, making it a cornerstone of modern energy systems and chemical manufacturing. While commercial extraction dominates, methane can also be generated through a variety of processes—from industrial coal conversion to biogas fermentation.

Step 1 – Extract Methane from Natural Gas

Natural gas typically contains about 75% methane. Commercial extraction involves a multi‑stage separation that removes heavier hydrocarbons and impurities, yielding high‑purity methane suitable for fuel, heating, or chemical feedstock.

Step 2 – Produce Methane by Coal Gasification

Bituminous coal, which contains at least 15% volatile material, can be gasified to produce a syngas mixture rich in methane, along with by‑products such as CO₂, ammonia, and benzene. The process is well established in power generation and industrial settings.

Step 3 – Generate Methane via the Sabatier Reaction

Mixing carbon dioxide with hydrogen in the presence of a nickel catalyst drives the Sabatier reaction, producing methane and water. This method is increasingly used in closed‑loop systems, such as space habitats and renewable energy storage.

Step 4 – Capture Methane from Biogas

Microbial fermentation of manure, compost, and other organic wastes in anaerobic digesters releases biogas, primarily methane. Though not yet profitable at large scale, biogas offers a sustainable route to recycle waste streams and supply local energy needs.

Step 5 – Explore Alternative Methane Sources

Methane hydrates—ice‑like structures found on the ocean floor—represent a vast, untapped reservoir. Advances in extraction technology may soon make hydrate‑derived methane a viable commercial resource.