我国化工行业碳排放评价核算问题与建议OA

In environmental impact assessments,conducting carbon emission accounting for construction projects and establishing a comprehensive evaluation indicator system are crucial for effectively controlling new carbon emissions and promoting early peak carbon achievements by enterprises.Currently,China has not established a unified national method for carbon emission evaluation and accounting of construction projects.This paper uses an ethylene project as a case study,applying six different greenhouse gas accounting methods:"National Standard Method""National Development and Reform Commission Method""Guangdong Province Method 1""Guangdong Province Method2""Beijing Method"and"Shanghai Method".The calculated CO2 emissions are 399.49 × 104,359.02×104,345.65×104,357.09×104,375.33×104,and 298.7×104 t/a,respectively.These methods differ in their accounting of fuel combustion,flare combustion,industrial processes,net purchased electricity,and heat,resulting in significant variations in the calculated emissions.Considering the low availability and poor accuracy of activity data and emission factors at the environmental assessment stage,it is recommended that enterprises uniformly adopt the carbon mass balance method for carbon emission accounting at the industrial process and equipment level.Additionally,carbon emissions from waste disposal entrusted to third parties should be included in indirect emissions,and carbon emission evaluation indicators at the equipment level should be enhanced.