Producing butanol from carbon dioxide

Carbon Capture Utilization (CCU) technology that converts carbon dioxide into high value-added compounds has been developed.



The National Research Foundation of Korea (Chairman Hong Won-hwa) announced on the 17th that Professor Lee Hyo-young's research team at Sungkyunkwan University successfully produced high-purity butanol from carbon dioxide using a new visible light catalyst.



Research on capturing, utilizing, and storing carbon dioxide, which is a cause of global warming, is being conducted worldwide. Due to limitations in high value-added compound manufacturing technology, there are great difficulties in developing utilization technology. Production costs are also a burden.



A domestic research team has developed a technology to produce butanol from carbon dioxide. [Photo = Sungkyunkwan University]



In the production of high value-added compounds, the carbon chain determines the price. The longer this chain is, the higher the price. This is because as the number of high-carbon atoms increases, more energy is consumed in the carbon-carbon coupling reaction and byproducts are generated, so high-cost separation and purification technology is required.



The development of technology that can selectively produce only one compound with a long carbon chain length and that does not require purification and separation of by-products is of utmost importance.



The research team combined a crystal plane engineering method that can increase efficiency and selectivity with a photocatalytic method that converts carbon dioxide into a useful resource such as butanol. They succeeded in producing butanol with a selectivity of up to 60% from carbon dioxide molecules. They



configured a new visible photocatalyst by combining cerium oxide (111) (CeO2), a promising photocatalyst for carbon dioxide reduction but limited by instability, and copper oxide (100) (Cu2O), which has excellent charge separation characteristics.



The research team precisely controlled the Cu2O crystal plane that affects the catalytic performance to improve the selectivity for butanol.



Professor Lee Hyo-young said, "This provides a clear perspective on understanding the interfacial effect for enhancing photocatalytic performance and valuable insight for sustainable chemical production," adding, "We expect that this will bring us one step closer to achieving carbon neutrality, which can solve human challenges by commercializing carbon dioxide, the main culprit of global warming, as a high value-added compound."



The research results (paper title: Enhancing Photocatalytic CO2 Reduction to Butanol by Facet-Dependent Interfacial Engineering of CeO2/Cu2O) were published online on February 3 in the international scientific journal Applied Catalysis B: Environment and Energy.





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