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- Title
Electrochemical CaC<sub>2</sub>‐Mediated Conversion of Biochar to C<sub>2</sub>H<sub>2</sub>: High Carbon Efficiency and Low Contamination.
- Authors
Zhang, Jichen; Wang, Zhiyong; Bennaceur, Salima; Jin, Xianbo
- Abstract
The carbon to CaC2 route is promising to provide a sustainable elementary unit, C2H2, 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 C2H2 through an electrolytic synthesis of solid CaC2 in molten CaCl2/KCl/CaO at 973 K. The main reactions are carbon reduction to CaC2 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 Ca3P2 in CaC2 and consequently eliminating H2S and PH3 contamination in the finally produced C2H2.
- Subjects
BIOCHAR; ORGANIC synthesis; CARBON; CALCIUM carbide; HIGH temperatures; ELECTROLYSIS
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 19, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202301479