Northwestern University researchers have discovered a new way to turn natural gas into liquid fuel\u2014and it\u2019s lightning in a bottle.<\/p>\n
By harnessing tiny bursts of plasma\u2014or mini \u201clightning bolts\u201d\u2014in glass tubes submerged in water, the team has successfully converted methane directly into methanol in a single step. Methanol is a versatile, high-demand industrial chemical used to make many products people use every day. It also is commonly used as an industrial solvent and is gaining attention as a cleaner-burning fuel for ships and industrial boilers.<\/p>\n
The method bypasses the extreme heat and high pressures required for current industrial processes, which blast apart methane and rebuild it as methanol in a multi-step process. While the current method is reliable, it\u2019s energy intensive and emits millions of tons of carbon dioxide per year globally.<\/p>\n
Using just electricity, water, and a copper-oxide catalyst, the new process could offer a cleaner, electrified path to producing one of the world\u2019s most widely used chemical building blocks.\u00a0<\/p>\n
\u201cWe\u2019re using pulses of high-voltage electricity,\u201d said Northwestern\u2019s Dayne Swearer, the study\u2019s corresponding author. \u201cIf the electrical potential is high enough, lightning bolts form inside of our reactor the way they do during a summer thunderstorm. We\u2019re taking advantage of that chemistry to break methane\u2019s bonds without heating the entire system to extreme temperatures.\u201d<\/p>\n
Swearer is an assistant professor of chemistry at Northwestern\u2019s Weinberg College of Arts and Sciences and of chemical and biological engineering at Northwestern Engineering. He also is a member of the International Institute of Nantechnology, Paula M. Trienens Institute for Sustainability and Energy, and the Northwestern-Argonne Institute for Scientific and Engineering Excellence.\u00a0\u00a0<\/p>\n
Ripping and rebuilding.\u00a0One of the world\u2019s most used commodity chemicals, methanol is a key ingredient in plastics, paints, and adhesives. More recently, researchers have explored methanol as a promising liquid fuel because its combustion produces lower sulfur emissions and particulate pollution than gasoline and diesel.<\/p>\n
Currently, industry generates methanol through a multi-step process, starting with steam reforming. First, methane is reacted with steam at temperatures exceeding 800 degrees Celsius to break it into carbon monoxide and hydrogen. Then, those gases are recombined under extremely high pressures\u2014200 to 300 times standard atmospheric pressure\u2014to form methanol. Tearing methane apart and rebuilding it consumes an enormous amount of heat and inherently generates carbon dioxide along the way.\u00a0<\/p>\n
\u201cThe extreme temperatures are needed to break the unreactive chemical bonds between carbon and hydrogen in methane,\u201d Swearer said. \u201cThen, you must use high pressure to squeeze all those molecules together onto the catalyst in order to make the methanol molecule. It works, but it\u2019s not the most straightforward path to making methanol from methane.\u201d<\/p>\n
![\"\"](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2026\/04\/northwestern-bubble-reactor.jpg\")
<\/p>\n
View of the bubble reactor in the lab<\/p>\n
Replacing heat with plasma.\u00a0While researchers have long sought a more energy-efficient, single-step solution, they have struggled to overcome two challenges. Methane is unusually stable and difficult to break apart, requiring extreme reaction conditions. Then, once methanol is formed, it continues to react, rapidly degrading into carbon dioxide. So, the challenge lies in not just starting the reaction but stopping it at exactly the right moment.<\/p>\n
To overcome these issues, Swearer and his team turned to plasma, a highly energized state of matter filled with fast-moving, \u201chot\u201d electrons. Most people might be familiar with plasma as the type of matter that makes up the sun or lightning bolts. Those are examples of hot plasmas. Swearer\u2019s group works primarily with cold plasmas, in which the gas molecules\u2019 temperature is closer to room temperature, but the electrons are selectively heated to temperatures that can exceed tens of thousands of degrees.<\/p>\n
\u201cMore than 99 percent of the observable universe is comprised of plasma,\u201d said James Ho, a PhD candidate in Swearer’s lab\u00a0and the study\u2019s first author. \u201cBut even though it\u2019s ubiquitous, it really is an untapped resource in the field of chemistry. The reason we use cold plasmas is because we can produce them at low temperatures and normal atmospheric pressure conditions.\u201d<\/p>\n
For the new single-step process, Ho built a plasma \u201cbubble reactor,\u201d which is essentially a porous glass tube coated with a copper oxide catalyst. Then, the team flowed methane gas through the tube while applying electrical pulses. The electricity transformed the methane gas into plasma, splitting methane and water into highly reactive fragments. Those fragments then recombined to form methanol, which immediately dissolves into the surrounding water. That rapid \u201cquenching\u201d stopped the chemical reaction at the right moment, preventing the methane from decomposing into carbon dioxide.<\/p>\n
Enhancing with argon.\u00a0To further enhance the process, the team diluted methane with argon, which is typically an inert noble gas. But, after ionizing argon in the plasma, the chemists discovered it became an active and reactive participant in the chemical process, increasing electron density within the plasma and reducing unwanted byproducts.<\/p>\n
Under the optimized conditions with argon present, the system demonstrated 96.8 percent methanol selectivity in the liquid mixture. In other words, of all the liquid products formed in the process, it was mostly methanol. And, of all the products formed\u2014both gas and liquid\u2014about 57 percent ended up as methanol.\u00a0<\/p>\n
\u201cWe also ended up with ethylene, which is a precursor to plastic production, and hydrogen gas, which is an important commodity chemical and a zero-carbon fuel in its own right,\u201d Swearer said. \u201cSo, we took methane, which is a very abundant gas, and turned it into methanol along with ethylene, hydrogen, and a bit of propane. These are all intrinsically more valuable products.\u201d<\/p>\n
![\"By](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2026\/04\/bottled-lightning-makes-a-cleaner-fuel.gif\")
<\/p>\n
By harnessing tiny bursts of plasma \u2014 or mini \u201clightning bolts\u201d \u2014 in glass tubes submerged in water, the team has successfully converted methane directly into methanol in a single step.<\/p>\n
Toward smaller, distributed systems.\u00a0If scaled, the plasma-driven system could enable smaller, distributed facilities that use electricity to convert methane into liquid fuels.<\/p>\n
\u201cWe could treat stranded resources, like leaky well heads that naturally emit methane into the environment,\u201d Swearer said. \u201cRight now, the way to deal with leaked methane is to light it on fire to turn it into carbon dioxide, which warms the climate less than methane but is still clearly a problem. Instead, we could take a smaller scale reactor to the place that\u2019s leaking methane and turn it into a transportable liquid fuel.\u201d<\/p>\n
Next, Swearer and his team plan to optimize the system further and explore ways to efficiently recover and separate methanol as a purified product.<\/p>\n
Related News<\/p>\n
From the Archive<\/p>\n","protected":false},"excerpt":{"rendered":"4\/17\/2026 12:00:00 PM This article was first published on the website of Northwestern’s McCormick School of Engineering webpage…\n","protected":false},"author":2,"featured_media":403612,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[61,60,82],"class_list":{"0":"post-403611","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-ie","9":"tag-ireland","10":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/403611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=403611"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/403611\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/403612"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=403611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=403611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=403611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}