Methane is both enormously useful and enormously problematic. As the primary component of natural gas, it powers homes, factories, and vehicles around the world. As a greenhouse gas, it is approximately 80 times more potent than carbon dioxide over a 20-year period. Converting it into methanol — a liquid fuel that can power ships and industrial boilers, and a building block for thousands of everyday chemical products — has long been a priority for clean energy researchers. The problem has always been the process: current industrial methods require temperatures of around 800°C (1,470°F) and very high pressures, consume vast amounts of energy, and emit millions of tonnes of carbon dioxide annually.
A team of chemists at Northwestern University in Evanston, Illinois, led by Dr Dayne Swearer, has developed a fundamentally different approach. Their method uses a device they call a bubble reactor: glass tubes submerged in water, through which methane gas bubbles upward while short bursts of high-voltage electricity pass through the liquid. These electrical pulses generate plasma — the energised state of matter that gives lightning its glow — in miniature form, creating what the researchers describe as tiny lightning bolts inside the tube.
The plasma breaks apart the chemical bonds in both methane and water molecules, producing highly reactive fragments. Those fragments recombine in the presence of a copper-oxide catalyst coating the reactor walls, forming methanol, which immediately dissolves into the surrounding water. The process operates at room temperature and normal atmospheric pressure — requiring no furnaces, no pressurised chambers, and a fraction of the energy of conventional methods.
Under optimised conditions, the system achieved 96.8 percent methanol selectivity — meaning that of all liquid products formed, almost all of it was methanol rather than unwanted byproducts. The findings were published in the Journal of the American Chemical Society on April 15, 2026. Northwestern University's commercialisation arm is already exploring how to scale the process. The next step is developing efficient methods to recover and separate the purified methanol product.