Environmental impact assessment of China's primary aluminum based on life cycle assessment
Autor: | Yaoqi Guo, Yi Yang, Wensong Zhu, Jian-bai Huang |
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Rok vydání: | 2019 |
Předmět: |
010302 applied physics
Primary energy business.industry Metals and Alloys Environmental engineering Thermal power station 02 engineering and technology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics 01 natural sciences Electricity generation Greenhouse gas 0103 physical sciences Materials Chemistry Environmental science Environmental impact assessment 0210 nano-technology business Life-cycle assessment Hydropower Efficient energy use |
Zdroj: | Transactions of Nonferrous Metals Society of China. 29:1784-1792 |
ISSN: | 1003-6326 |
Popis: | Assessing and accounting for material consumption and environmental impact are necessary to measure environmental externalities of the aluminum industry and to construct an ecological civilization. In this research, life cycle assessment (LCA) theory was used to assess the environmental impact of primary aluminum based on the lime soda Bayer process and different power generation modes, and the sources and distributions of the four selected impact categories were analyzed. The results show that, (1) Negative environmental impact of aluminum industry generally occurs from alumina extraction, carbon anode fabrication and electrolysis, particularly electrolysis and alumina extraction. Primary energy demand (PED), water use (WU), global warming potential (GWP) and freshwater eutrophication potential (FEP) are main environmental impact categories. (2) The environmental load with thermal power is higher than that with hydropower, e.g., for the former, the greenhouse gas emission coefficient of 21800 kg CO2 eq/t (Al) will be generated, while for the latter, 4910 kg CO2 eq/t (Al) will be generated. (3) Both power mode methods reflect the energy structure, whereas direct emissions reflect the technical level, indicating the potential for large energy savings and emission reductions, and some policies, related to clean power, energy efficiency and technological progress, should be made for emission reduction. |
Databáze: | OpenAIRE |
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