{"id":60311,"date":"2019-02-05T07:38:36","date_gmt":"2019-02-05T06:38:36","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=60311"},"modified":"2021-09-09T21:31:38","modified_gmt":"2021-09-09T19:31:38","slug":"scientists-turn-carbon-emissions-into-usable-energy","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/scientists-turn-carbon-emissions-into-usable-energy\/","title":{"rendered":"Scientists Turn Carbon Emissions into Usable Energy"},"content":{"rendered":"
\"Professor-Guntae-Kim-1-800x448\"
From upper left side (clockwise) are Professor Guntae Kim, Sangwook Joo, Jeongwon Kim, and Changmin Kim in the School of Energy and Chemical Engineering at UNIST.<\/figcaption><\/figure>\n

A recent study, affiliated with UNIST has developed a system that produces electricity and hydrogen (H2<\/sub>) while eliminating carbon dioxide (CO2<\/sub>), which is the main contributor of global warming.<\/strong><\/p>\n

Published This breakthrough has been led by Professor Guntae Kim in the School of Energy and Chemical Engineering at UNIST in collaboration with Professor Jaephil Cho in the Department of Energy Engineering and Professor Meilin Liu in the School of Materials Science and Engineering at Georgia Institute of Technology.<\/p>\n

In this work, the research team presented\u00a0Hybrid Na-CO2<\/sub>\u00a0system that can continuously produce electrical energy and hydrogen through efficient CO2<\/sub> conversion with stable operation for over 1,000 hr from spontaneous CO2<\/sub> dissolution in aqueous solution.<\/p>\n

\u201cCarbon capture, utilization, and sequestration (CCUS) technologies have recently received a great deal of attention for providing\u00a0a pathway in dealing with global climate change,\u201d says Professor Kim. \u201cThe key to that technology\u00a0is the easy conversion of\u00a0chemically stable CO2<\/sub> molecules to other materials.\u201d He adds, \u201cOur new system has\u00a0solved this problem with\u00a0CO2<\/sub> dissolution mechanism.\u201d<\/p>\n

\"Schematic-Illustration-of-Hybrid-Na-CO2-System-and-its-Reaction-Mechanism-1\"
Schematic illustration of Hybrid Na-CO2 System and its reaction mechanism.<\/figcaption><\/figure>\n

Much of human\u00a0CO2<\/sub> emissions are absorbed by the ocean and turned into acidity. The researchers focused on this phenomenon and came up with the idea of melting\u00a0CO2<\/sub> into water to induce an electrochemical reaction. If acidity increases, the number of protons increases, which in turn increases the power to attract electrons. If a battery system is created based on this phenomenon, electricity can be produced by removing CO2<\/sub>.<\/p>\n

Their Hybrid Na-CO2<\/sub> System, just like a fuel cell, consists of a cathode (sodium metal), separator (NASICON), and anode (catalyst). Unlike other batteries, catalysts are contained in water and are connected by a lead wire to a cathode. When\u00a0CO2<\/sub> is injected into the water, the entire reaction gets started, eliminating\u00a0CO2<\/sub> and creating electricity and H2. At this time, the conversion efficiency of\u00a0CO2<\/sub> is high at 50%.<\/p>\n

\u201cThis hybrid Na-CO2<\/sub> cell, which adopts efficient CCUS technologies, not only utilizes CO2<\/sub> as the resource for generating electrical energy but also produces the clean\u00a0energy source,\u00a0hydrogen,\u201d says Jeongwon Kim in the Combined M.S\/Ph.D. in Energy Engineering at UNIST, the\u00a0co-first author for the research.<\/p>\n

\u00a0<\/a>\"61e4b2a4-e461-415e-a554-7c99b17b082c\"<\/a><\/p>\n

\u25b2 The system produce electrical energy and\u00a0hydrogen through efficient CO2<\/sub> conversion (Electric current is presented on the display below).<\/p>\n

In particular, this system has shown stability to the point of operating for more than 1,000 hours without damage to electrodes. The system can be applied to remove CO2<\/sub> by inducing voluntary chemical reactions.<\/p>\n

\u201cThis research will lead to more derived research and will be able to produce H2 and electricity more effectively when electrolytes, separator, system design, and electrocatalysts are improved,\u201d said Professor Kim.<\/p>\n

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