废PET瓶再生制造涤纶长丝碳足迹及深度降碳潜力分析  

Analysis of carbon footprint and deep decarbonization potential of recycled polyester filament from waste PET bottles

作　　者：江子萱 张蓝心 李天源 朱恩斌 朱福和 温宗国[1] 张丽萍[1] JIANG Zixuan;ZHANG Lanxin;LI Tianyuan;ZHU Enbin;ZHU Fuhe;WEN Zongguo;ZHANC Liping(Center of Green Economy and Sustainable Development,School of Environment,Tsinghua University,Beijing 100084,China;Key Lab for Sport Shoes Upper Materials of Fujian Province,Fujian Huafeng New Material Co.,Ltd.,Putian 351164,China;Key Lab of Textile Close-Loop Recycled PET Filament,Fujian Cyclone Technology Co.,Ltd.,Putian 351254,China)

机构地区：[1]清华大学环境学院,清华大学绿色经济与可持续发展研究中心,北京100084 [2]福建华峰新材料有限公司,福建省运动鞋面料重点实验室,福建省莆田市351164 [3]福建赛隆科技有限公司,纺织行业循环再利用纤维长丝重点实验室,福建省莆田市351254

出　　处：《环境工程》2025年第1期12-20,共9页Environmental Engineering

基　　金：福建省科技计划项目“废PET塑料回收再生制造高品质聚酯纤维的绿色低碳技术研究与应用”(2023Y3004)。

摘　　要：废PET瓶回收再生制造涤纶长丝不仅可以解决塑料污染问题,也有利于温室气体减排与循环经济发展。构建废PET瓶再生制造涤纶长丝的通用性碳足迹及碳减排核算方法,结合实际生产案例及本地化数据库定量评估了再生涤纶长丝碳足迹和与原生长丝相比的碳减排量,基于技术调研提出了高品质再生长丝深度降碳措施并估算其降碳潜力。结果显示:高品质再生长丝碳足迹为1139~1779 kg CO_(2)eq/t,较原生长丝降低了64%~77%。电力消耗是产品碳足迹的主要贡献环节和深度降碳的切入点,深度降碳可通过自主光伏发电替代、热回收节电等方式实现,进一步降低再生长丝约20%的碳足迹可通过16%的光伏绿电替代并同时节电16%实现。研究结果可为再生长丝碳足迹核算提供方法学及本地化数据,为再生长丝生产深度降碳提供具体支撑,进而推动我国纺织行业的绿色低碳转型。With the development of plastic pollution and the promotion of circular economy, the recycling of waste plastics has become an important issue in today's world. The recycling of waste PET bottles to polyester filament can not only solve the problem of plastic pollution, but also contribute to the reduction of greenhouse gas emissions and the formation of circular economy. In this paper, a general carbon footprint and carbon emission reduction accounting method for filament recycled from waste PET bottles was established. The carbon footprint of recycled filament and carbon emission reduction compared with that of the virgin filament were quantitatively assessed based on actual production cases and localized databases. Furthermore, based on the technical investigation, the deep decarbonization measures of high-quality recycled filament were proposed and the deep decarbonization potential was estimated. The results showed that the carbon footprint of high-quality recycled filament was 1139 to 1779 kg CO_2eq/t, 64% to 77% lower than that of the virgin filament. Power consumption is the main contributor to the product's carbon footprint and the entry point for deep carbon reduction, which can be achieved through photovoltaic power generation replacement, heat recovery and electricity saving, etc. Substituting 16% of electricity from power grid with photovoltaic and simultaneously saving 16% of electricity consumption can reduce the carbon footprint by approximately 20%. The research results can provide methodology and localized data reference for carbon footprint accounting of recycled filament, offer concrete support for further decarbonization of recycled filament production, and promote the green and low-carbon transformation of China's textile industry.

关 键 词：再生涤纶 废PET瓶 碳足迹核算 碳减排 

分 类 号：X791[环境科学与工程—环境工程] X705