Polyvinyl chloride(PVC)produced by calcium carbide is one of the high-energy-consuming indus-tries.Using SimaPro software,life cycle evaluation was carried out on the four main process units of the pro-cess:calcium carbide smelting,acetylene preparation,polyethylene(VCM)synthesis and PVC synthesis.Eigh-teen environmental impact assessment indicators were selected and greenhouse gas emissions were calculat-ed to effectively identify the stage where carbon emissions were concentrated in the PVC production process,and six ways to promote energy conservation and carbon reduction in the PVC production process were pro-posed.
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