Towards carbon neutrality of calcium carbide-based acetylene production with sustainable biomass resources  

作　　者：Peng Jiang Guanhan Zhao Hao Zhang Tuo Ji Liwen Mu Xiaohua Lu Jiahua Zhu 

机构地区：[1]State Key Laboratory of Materials-oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing,211816,China

出　　处：《Green Energy & Environment》2024年第6期1068-1078,共11页绿色能源与环境（英文版）

基　　金：the National Natural Science Foundation of China(21978128,91934302);the State Key Laboratory of Materials-oriented Chemical Engineering(ZK202006)is acknowledged.

摘　　要：Acetylene is produced from the reaction between calcium carbide(CaC_(2))and water,while the production of CaC_(2) generates significant amount of carbon dioxide not only because it is an energy-intensive process but also the raw material for CaC_(2) synthesis is from coal.Here,a comprehensive biomass-to-acetylene process was constructed that integrated several units including biomass pyrolysis,oxygen-thermal CaC_(2) fabrication and calcium looping.For comparison,a coal-to-acetylene process was also established by using coal as feedstock.The carbon efficiency,energy efficiency and environmental impacts of the bio-based calcium carbide acetylene(BCCA)and coal-based calcium carbide acetylene(CCCA)processes were systematically analyzed.Moreover,the environmental impacts were further evaluated by applying thermal integration at system level and energy substitution in CaC_(2) furnace.Even though the BCCA process showed lower carbon efficiency and energy efficiency than that of the CCCA process,life cycle assessment demonstrated the BCCA(1.873 kgCO_(2eq) kg-prod^(-1))a lower carbon footprint process which is 0.366 kgCO_(2eq) kg-prod^(-1) lower compared to the CCCA process.With sustainable energy(biomass power)substitution in CaC_(2) furnace,an even lower GWP value of 1.377 kgCO_(2eq) kg-prod^(-1) can be achieved in BCCA process.This work performed a systematic analysis on integrating biomass into industrial acetylene production,and revealed the positive role of biomass as raw material(carbon)and energy supplier.

关 键 词：Biomass pyrolysis CO_(2)mitigation Calcium carbide ACETYLENE Calcium loop 

分 类 号：TQ221.242[化学工程—有机化工] TK6[动力工程及工程热物理—生物能]