基于生命周期评价的原生和再生PET纤维环境影响对比分析

刘奇汶; 毕莹莹; 董黎明; 董莉; 刘景洋

doi:10.12153/j.issn.1674-991X.20220835

基于生命周期评价的原生和再生PET纤维环境影响对比分析

doi: 10.12153/j.issn.1674-991X.20220835

刘奇汶^{1, 2,},
毕莹莹¹,
董黎明²,
董莉¹,
刘景洋^1, ,

1.
国家环境保护生态工业重点实验室, 中国环境科学研究院
2.
北京工商大学生态环境学院

基金项目: 中国环境科学研究院国家环境保护生态工业重点实验室开放基金（2022KFF-15）；中央级公益性科研院所基本科研业务费专项（2022YSKY-09）

详细信息

作者简介:
刘奇汶（1998—），男，硕士研究生，主要从事清洁生产与资源综合利用研究，1624551229@qq.com

通讯作者:
刘景洋（1974—），男，研究员，博士，主要从事生态工业、循环经济方面的研究，liujy@cares.org.cn

中图分类号: X82
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出版历程
- 收稿日期: 2022-08-22
- 录用日期: 2023-04-21
- 修回日期: 2022-11-28
- 网络出版日期: 2023-05-15

Comparative analysis of the environmental impact of virgin and recycled PET fibers based on life cycle assessment

LIU Qiwen^{1, 2
,},
BI Yingying¹,
DONG Liming²,
DONG Li¹,
LIU Jingyang^{1
, ,}

1.
State Environmental Protection Key Laboratory of Eco-Industry, Chinese Research Academy of Environmental Sciences
2.
School of Ecology and Environment, Beijing Technology and Business University

摘要

摘要:
分别以再生长丝〔以回收再生聚对苯二甲酸乙二醇酯（PET）瓶片为原料制备〕及原生长丝（以精对苯二甲酸和乙二醇为原料制备）为分析对象，利用生命周期评价(LCA)方法量化分析生产各阶段的环境影响及贡献，并提出减小环境影响的建议。选取全球变暖潜值、酸化效应潜值、非生物耗竭、光化学臭氧合成、陆地生态毒性潜值 5种环境影响类别进行分类计算。结果表明：再生长丝生产过程中熔融纺丝阶段的环境影响贡献大于物理处理阶段；通过特征化分析和归一化分析，与原生PET长丝相比，生产每100 kg的再生PET长丝全球变暖潜势减少32.09 kg (以CO₂计），酸化效应潜值减少0.37 kg (以SO₂计)；原生PET长丝和再生PET长丝生产过程中环境影响贡献最大的类别均为非生物耗竭。根据生命周期多边形法对5种环境影响类别的综合直观评估结果表明，再生PET长丝相比于原生PET长丝对环境影响更小，可以从能源优化、工艺环节改善等方面减小环境影响。
- PET /
- 再生长丝 /
- 原生长丝 /
- 生命周期评价（LCA) /
- 环境影响
Abstract:
The recycled polyester filaments prepared from recycled polyethylene terephthalate (PET) bottles and virgin filaments prepared from refined terephthalic acid and ethylene glycol were used as the analysis objects. The whole life cycle assessment (LCA) method was used to quantitatively analyze the environmental impact and contribution of each stage of production, and some suggestions for reducing environmental impact were put forward. Five environmental impact categories, including global warming potential (GWP), acidification, abiotic depletions, photochemical oxidation and terrestrial ecotoxicity, were selected for classification and calculation. The results showed that the environmental impact contribution of melt spinning stage in the production process of recycled filament was greater than that of physical treatment stage. Through characterization analysis and normalization analysis, compared with the virgin filament, the global warming potential of recycled filament per 100 kg was reduced by 32.09 kg CO₂ eq, and the acidification potential was reduced by 0.37 kg SO₂ eq. The most important categories of environmental impact in the production of virgin filament and recycled filament were abiotic depletions. According to the comprehensive and intuitive assessment of five environmental impact categories by the life cycle polygon method, the environmental impact of recycled filament was smaller than that of virgin filament, and the environmental impact could be reduced from the aspects of energy optimization and process improvement.
- PET /
- recycled filament /
- virgin filament /
- life cycle assessment (LCA) /
- environmental impact

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图 1 系统边界

Figure 1. System boundary

下载: 全尺寸图片幻灯片

图 2 原生PET长丝的中点环境影响

Figure 2. Midpoint environmental impact of primary PET fiber

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图 3 再生PET长丝的中点环境影响

Figure 3. Midpoint environmental impact of recycled PET filaments

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图 4 原生和再生PET长丝的归一化结果

Figure 4. Normalization results of virgin and recycled PET filaments

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图 5 原生和再生PET长丝环境影响的生命周期评估多边形

Figure 5. Life cycle evaluation polygons of virgin and recycled PET filaments environmental impacts

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图 6 再生PET长丝各因素对环境影响的占比图及多边形图

Figure 6. Proportion chart and polygon chart of the environmental impact of various factors of recycled PET filament

下载: 全尺寸图片幻灯片

表 1 环境影响类别及环境影响因子

Table 1. Environmental impact categories and environmental impact factors

环境影响类别	环境影响因子	单位
全球变暖潜势	CO₂	kg(以 CO₂ eq.计）
光化学臭氧合成	乙烯( C₂H₄ )	kg（以 C₂H₄ eq.计）
陆地生态毒性潜值	二氯苯( DB)	kg (以1,4-DB eq.计）
酸化效应潜值	SO₂	kg（以 SO₂ eq.计）
非生物耗竭	锑（Sb）	kg （以Sb eq.计）

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表 2 环境影响类别的归一化因子

Table 2. Normalization factors of environmental impact categories

环境影响类别	归一化因子
全球变暖潜势	4.18×10¹³
陆地生态毒性潜值	3.72×10¹⁰
酸化效应潜值	3.18×10¹¹
光化学臭氧合成	2.90×10¹⁰
非生物耗竭	1.83×10¹¹

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表 3 原生PET长丝和再生PET长丝的特征化总值

Table 3. Total characteristic values of virgin PET filament and recycled PET filament

类别	全球变暖潜值/kg （以CO₂ eq.计）	酸化效应潜值/kg （以SO₂ eq.计）	光化学臭氧合成/kg （以 C₂H₄ eq.计）	陆地生态毒性潜值/ kg （以1,4-DB eq.计）	非生物耗竭/kg （以Sb eq.计）
原生长丝	149.29	2.33	1.05	0.03	1.60
再生长丝	117.21	1.96	0.08	0.02	1.86

下载: 导出CSV

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