Life cycle assessment and sustainable production evaluation of calcium carbide industry in China
2022
Huo, Hailong | Liu, Xunliang | Wen, Zhi | Lou, Guofeng | Dou, Ruifeng | Su, Fuyong | Fang, Juan | Jiang, Zeyi
With the rapid development of the calcium carbide (CaC₂) industry in China, the growth in CaC₂ demand is confronting an increasing pressure to reduce environmental emissions. However, the environmental impacts of CaC₂ production remain poorly understood. Life cycle assessment is employed in this study to provide a comprehensive analysis of the environmental performance of CaC₂ production in China. The results show that the environmental load of the semi-closed furnace process is higher than that of the closed furnace process. Electricity supported by thermal power is the most sensitive factor. A significant regional layout of CaC₂ production, adjoining the coal-electricity-intensive areas, has been observed in China. The sustainable scenarios are developed to evaluate the environmental reduction potential in terms of technical progress and electric grid improvement. It is noted that increasing the proportion of renewable power in the electric grid has obvious environmental benefits for CaC₂ production. The average energy conservation and emission reduction index of CaC₂ production in the northwest China is 1.81–2.10 times higher than that in the southwest China. The findings of this study will give a reference for the decision-makers to take conducive emission reduction measures for the sustainable development of the CaC₂ industry in China.
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