Institute of Process Engineering,Chinese Academy of Sciences
University of Chinese Academy ofSciences
Institute of Coal Chemistry,Chinese Academy of Sciences
Shanghai Advanced Research Institute,Chinese Academy of Sciences

双碳战略是国家重大战略,也是推动国家经济高质量可持续发展的必由之路。我国碳达峰到碳中和时间短、任务重。我国化工冶金每年碳排放约36亿t,约占全国工业碳排放量的36%,此外化工冶金废气、固废、废热产生量大、堆存量多、难利用、循环利用率低。发展化工冶金低碳化转型和变革,是我国工业领域双碳目标实现的根本保证。我国化工冶金历时百年,已发展成熟,仅通过原料燃料替代及绿色工艺转型减碳容量有限,亟需开展化工冶金跨行业耦合与循环利用技术变革,深入推动工业领域减碳。我国化工冶金大多是孤立、非循环连续工艺过程,引起跨行业耦合难、循环利用难度大的问题。针对上述问题,首先分析了化工冶金行业碳排放治理现状及国家战略需求;其次,提出了废气与废热耦合热化学转化制高质气体、废气与废气耦合定向催化制高端化学品、废气与固废耦合制低碳材料3个减碳增效策略。结合其技术发展现状和趋势,提出了拟重点发展的化工冶金跨行业耦合二氧化碳循环利用技术,以期为工业低碳绿色发展提供支撑。

The dual carbon strategy is a major national strategy,which will also promote the high-quality and sustainable development ofthe national economy. The time of China′s carbon peak to carbon neutrality is short and the task is heavy. Carbon dioxide emissionsfrom chemical and metallurgy in China are about 3.6 billion tons per year,accounting for about 36% of the country′s industrial carbonemissions. In addition,waste gas,solid waste,waste heat generation from chemical and metallurgical possess large heap stock,difficult touse,low recycling rate. The development of low-carbon transformation and revolution of chemical and metallurgy is the fundamental guarantee for the realization of the dual carbon goal in China′s industrial field. Most of China′s chemical and metallurgy are mature processesof more than 100 years,and the carbon reduction capacity is limited only through raw material and fuel substitution,together with greenprocess transformation,so it is urgent to carry out cross-industry coupling and recycling technology of chemical and metallurgy,which canfurther promote carbon reduction in these industrial field. Most of China′s chemical and metallurgy are isolated,non-cyclic continuousprocesses,which will cause the difficult of cross-industry coupling and recycling. In response to the above problems,the current situationof the control for carbon emission and national strategic for the realization of the dual carbon goal in chemical and metallurgy were firstlyanalyzed. Secondly,three strategies for carbon reduction and efficiency improvement were proposed: The coupling of waste gas and wasteheat for transferring into high-quality gas,the coupling of waste gas and waste gas to produce high-end chemicals,and the coupling ofwaste gas and solid waste to produce low-carbon based materials. Finally,in order to provide support for the low-carbon and green development of industry,the specific technology for cross-industry coupling carbon dioxide recycling of chemical and metallurgy were proposed.

中国科学院A类战略性先导科技专项资助项目(XDA0390400)

李双德,李振荣,董笑,等.化工冶金跨行业耦合二氧化碳循环利用技术[J].洁净煤技术,2024,30(4):171-178.

LI Shuangde,LI Zhenrong,DONG Xiao,et al. Cross-industry coupling carbon dioxide recycling technology in chemicaland metallurgy[J].Clean Coal Technology,2024,30(4):171-178.