Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan, 430072, P. R. China.
Angew Chem Int Ed Engl. 2023 May 2;62(19):e202301479. doi: 10.1002/anie.202301479. Epub 2023 Mar 30.
The carbon to CaC route is promising to provide a sustainable elementary unit, C H , for the organic synthesis industry, but the traditional thermal reaction process suffers from low carbon efficiency, harmful gas contamination, high temperature operation, and risky CO management. We herein report a high carbon efficiency (ca. 100 %) conversion of biochar to C H through an electrolytic synthesis of solid CaC in molten CaCl /KCl/CaO at 973 K. The main reactions are carbon reduction to CaC at the solid carbon cathode and oxygen evolution at an inert anode. Meanwhile, the electrolysis removes S and P from the solid cathode, avoiding the formation of CaS and Ca P in CaC and consequently eliminating H S and PH contamination in the finally produced C H .
通过在 973K 的熔融 CaCl/KCl/CaO 中进行固态 CaC 的电解合成，我们报告了一种将生物炭高效（约 100%）转化为 CH 的方法。该方法利用碳在固体碳阴极上还原为 CaC，以及在惰性阳极上氧的析出。同时，电解还可以从固体阴极中去除 S 和 P，避免了 CaC 中 CaS 和 CaP 的形成，从而消除了最终生成的 CH 中 H2S 和 PH 的污染。
