CO_(2)-Free Calcium Carbide Manufacturing: Demanded Strategy in the Carbon-Neutral Chemical Industry

作     者：Dmitriy E.Samoylenko Konstantin S.Rodygin Valentine P.Ananikov Dmitriy E.Samoylenko;Konstantin S.Rodygin;Valentine P.Ananikov

作者机构：Institute of ChemistrySaint Petersburg State University7/9 Universitetskaya nabSt.Petersburg199034 Russia Zelinsky Institute of Organic ChemistryRussian Academy of SciencesLeninsky pr.47Moscow119991 Russia 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2023年第41卷第24期

页      面：3611-3617页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by RSF 21-73-20003 and SPSU(ID 94030064)。 

主　　题：CO_(2)emission CaC_(2) Carbon cycle Sustainable chemistry Green chemistry 

摘      要：Calcium carbide is considered a possible key component in the sustainable carbon cycle,including convenient recycling of carbon wastes to industrial uptake.However,currently employed CaC2 manufacturing process produces significant amounts of CO_(2).One of the main factors of its appearance is the formation of carbon oxide during the reaction.The reaction of lime ore with coal inevitably results in the formation of CO and the loss of one carbon atom.CO is usually burnt,forming CO_(2) to maintain the required high temperature during synthesis – 2200 ℃.In the present study,we discuss that the use of calcium metal instead of lime represents a good opportunity to prevent CO_(2) emission since the reaction of Ca with carbon occurs in an atom-efficient manner and results in only CaC_(2) at a much lower temperature of 1100 ℃.Here,the reaction of Ca with carbon was successfully tested to synthesize CaC_(2).The desired product was isolated in gram-scale amounts in 97.2% yield and 99% purity.The environmental friendliness of the proposed method originates from the calculations of the E-factor.Rationalization is provided concerning the cost factor of Ca within the considered process.