中国水泥生命周期粉煤灰替代的CO<sub>2</sub>减排研究

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Abstract The CO₂ reduction induced by material in the situation of fly ash replacement is calculated by the guideline of Greenhouse Gas Emissions of Chinese Cement Enterprises. Meanwhile, the CO₂ reduction induced by energy employment also defined by the methods from Intergovernmental Panel on Climate Change. The results show that considering industrial symbiosis with coal-fired power plants, 92.676kg/t cement of CO₂ are reduced. It is demonstrated that the replacement of clinker with fly ash is the main part leading to CO₂ reduction in China's cement industry. When combined with the replacement of raw materials, the maximum CO₂ reduction per ton of cement can be up to 373.303kg. In the application stage, the carbonization effect of concrete formed by fly ash and Portland cement has increased, and one ton of cement will adsorb 192.015kg of CO₂ by 2050. In the context of fly ash replacement, the emission reduction caused by the change of waste heat generation and the clean electricity employment with different proportion are forecasted. It is found that the measure can also effectively promote the achievement of carbon peak and neutrality goals.

Key words： cement life cycle fly ash substitution CO₂ reduction industry symbiosis

Received: 13 September 2021

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X511

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	XIAO Jing
	LIANG Xue-min
	ZHANG Yi-chang
	ZHANG Yue-ling

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XIAO Jing,LIANG Xue-min,ZHANG Yi-chang等. Study on CO₂ reduction of cement with fly ash substitute from the perspective of life cycle in China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1934-1944.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I4/1934

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