Relationship Between Complexity and Carbon Emissions in Refining and Chemical Industry
The complexity of the refining and chemical industry is closely related to carbon emissions per unit of crude processing volume(hereinafter referred to as unit carbon emissions),and for this reason,the investigation of their relationship can provide theoretical guidance for achieving"carbon peaking and carbon neutrality goals"in the refining and chemical industry.As a case study of China's refining and chemical industry,the paper constructs a topology structure model of process unit in the refining and chemical industry,calculates and classifies unit carbon emissions and complexity indexes,and analyzes product and carbon emission characteristics.Further,this paper analyzes the relationship between complexity and carbon emission,and explores the quantitative relationship behind the both.Finally,the scenario analysis is used to assess the potential of three emission reduction paths,and corresponding suggestions on carbon reduction are proposed.The results show that unit carbon emission in the refining and chemical industry tends to increase first and then decrease with the complexity index.The potential of emission reduction under different emission reduction measures is explored based on scenario analysis,and it is found that 80％carbon reduction can be achieved by adopting the only green electricity supply scheme in a simple refinery.Therefore,complex and integrated refineries shall focus on the carbon reduction scheme dominated by carbon capture,utilization and storage(CCUS)technology and green electricity supply,supplemented by green hydrogen rather than ash hydrogen.
refining and chemical industrycarbon emissioncomplexitycarbon neutralityscenario analysisenergy conservation and emission reduction
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