Dynamic material flow analysis of Chinese passenger car plastics

JIANG Xiao-bin; JIANG Jian; CHEN Ding-jiang; ZHOU Wen-ji; ZHU Bing

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China Environmental Science ›› 2020, Vol. 40 ›› Issue (9) : 4106-4114.

Environmental Impact Assessment and Management

Dynamic material flow analysis of Chinese passenger car plastics

JIANG Xiao-bin¹, JIANG Jian¹, CHEN Ding-jiang^1,2, ZHOU Wen-ji³, ZHU Bing^1,2

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Abstract

In this study, China's passenger car plastic flows and stocks from 1950 to 2018 were accounted and scenario analysis until 2050 was also carried out by constructing a dynamic material flow analysis (MFA) model with the industry data. The accounting results showed that from 1950 to 2018, China's domestic passenger car industry consumed a total of 32.78million tons (Mton) of plastics, mainly including polypropylene (PP) and polyurethane (PU). The accumulative amount of plastic wastes reached 3.37 Mton. The recycling rate was only 28% for the plastic wastes generated at scrap car disassembly plants. Further, a set of scenarios were designed based on various combinations of two key factors, namely, passenger car ownership and plastic usage per passenger car. The scenario analysis results showed that the stock of automotive plastics and waste plastics would increase substantially. Across all the scenarios, the stock would reach 70~270 Mton by 2050, along with 5~16 Mton of waste plastics. These results could give references to the industries of automobile disassembly and plastic recycling. If the recycling rate of automotive waste plastics could reach 80% by 2050, 3.76 Mton waste plastics would be reduced annually, which would significantly mitigate environmental risks caused by landfill or incineration.

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dynamic material flow analysis / plastics / scrapped cars / stock

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JIANG Xiao-bin, JIANG Jian, CHEN Ding-jiang, ZHOU Wen-ji, ZHU Bing. Dynamic material flow analysis of Chinese passenger car plastics[J]. China Environmental Science. 2020, 40(9): 4106-4114

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