Chinese Scientists are Developing a Coal Fuel Cell Which Can Generate Electricity Without Combustion and Carbon Emissions: It Also Recycles Carbon On-Site

      Fuel cells produce energy without combustion. Instead, they make energy via chemical reactions. A research team led by Xie Heping of the Chinese Academy of Sciences at Shenzhen University has developed what they describe as a zero-carbon-emission direct coal fuel cell (ZC-DCFC). To release the electrochemical energy of the coal, it is pulverized into a fine powder, dried, purified, and treated before being fed into the anode chamber. Oxygen flows into the cathode, where the coal particles are directly oxidized through an oxide membrane, producing an electrochemical reaction that generates electricity.

     According to Interesting Engineering:

“At the outlet of the anode, the carbon dioxide produced by the reaction is captured directly on-site and then either catalytically transformed into useful chemical feedstocks such as synthesis gas or chemically stabilized into compounds like sodium bicarbonate. This closed-loop handling of carbon contributes to a process that is described as both silent and clean in operation.”

     This is much different than burning coal to produce heat to run steam turbines. Those processes are limited by the thermodynamics of heat engines, which limit thermal efficiency to 40%, which is known as the Carnot efficiency ceiling. Zie notes that:

“…the zero-carbon-emission direct coal fuel cell (ZC-DCFC) avoids the energy losses associated with combustion and heat-based engine systems, allowing for significantly higher theoretical efficiency.”

     This technology has been slowly advancing since 2018, as “challenges in materials science, cell durability, fuel processing, and the ability to maintain continuous coal feed” have been addressed.

“The latest version of the fuel cell, though, improves stack scalability, long-term stability, carbon conversion efficiency, and overall system integration, according to the research team.”

“Xie also noted that the concept could be applied to deep coal seams located about 1.2 miles underground. Instead of mining and transporting coal to the surface – a costly and complex process – the system could convert coal into electricity in situ, transmitting only power upward. In turn, this approach could help offset pressure on supply as shallow coal reserves gradually diminish.”

     Capturing and utilizing CO2 on-site is a key feature of the fuel cell. High-purity CO2 is captured at the anode and transformed into syngas and/or minerals. There are still many details to be worked out and improved with this technology, but it is a significant effort to extract energy from coal in a much more sustainable way.

References:

 

China is developing a technology that converts coal into electricity with nearly zero carbon emissions. Sarah Jones. Daily Galaxy. June 4, 2026.  China is developing a technology that converts coal into electricity with nearly zero carbon emissions

China’s electrochemical system converts coal into electricity with no direct carbon emission. Chinese researchers have developed a coal-based fuel cell that generates electricity through an electrochemical process rather than combustion. Bojan Stojkovski. Interesting Engineering. April 26, 2026. China's tech turns coal into electricity with no direct carbon emission