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The eco-efficiency evaluation in China's cement industry: A city-level study
Yihan Wang1, Mao Xu2, Xiaojun Lv3
1State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), School of Environment, Tsinghua University, Beijing 100084, China; Department of Civil Engineering, The University of Hong Kong, Hong Kong.
The Science of the Total Environment
|January 1, 2023
Summary
China's cement industry eco-efficiency varies significantly by city. This study reveals concentrated energy consumption and emissions, with low eco-efficiency clusters not always aligning with high pollution areas, aiding environmental target implementation.
Area of Science:
- Environmental Science
- Industrial Ecology
- Regional Planning
Background:
- China's cement industry faces strict environmental targets.
- Evaluating city-level eco-efficiency is crucial for regional implementation.
- Understanding spatial distribution of energy consumption and emissions is key.
Purpose of the Study:
- To evaluate city-level eco-efficiency in China's cement industry.
- To analyze the spatial features of energy consumption and emissions.
- To inform the implementation of environmental targets like carbon peaking and pollution caps.
Main Methods:
- Established a plant-level database of 4000+ production lines across 341 cities.
- Calculated energy consumption and CO2, SO2, NOx, and PM emissions.
- Evaluated city-level eco-efficiency using the Slacks-based Measure.
Main Results:
- Energy consumption and emissions are highly concentrated, with ~10% of land area accounting for 28.4%-34.6% of totals in 2019.
- Average eco-efficiency values were 0.761 for clinker calcination and 0.714 for cement grinding.
- Low eco-efficiency city clusters did not consistently overlap with high consumption/emission areas.
Conclusions:
- City-level eco-efficiency assessment provides comprehensive instruction for environmental target implementation.
- Spatial analysis highlights regional disparities in the cement industry's environmental impact.
- Findings support targeted strategies for carbon peaking and pollution control in China's cement sector.
Keywords:
Cement industryData Envelopment AnalysisEmissionEnergy consumptionMoran's I indexPlant-level databaseMore Related Videos
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