Evaluation of an environmental profile comparison for nanocellulose production and supply chain by applying different life cycle assessment methods

编号 020022003

推送时间 20200106

研究领域 林产化工 

年份 2020 

类型 期刊 

语种 英语

标题 Evaluation of an environmental profile comparison for nanocellulose production and supply chain by applying different life cycle assessment methods

来源期刊 Journal of Cleaner Production

期 第220期

发表时间 20191102

关键词 Life cycle assessment methods;  Nanocellulose; 

摘要 The interest in nanocellulose made from woody biomass has been growing rapidly; however, detailed studies on the environmental performance of nanocellulose have only been reported on a few occasions. To fulfill this gap, the environmental performance of nanofibrillated cellulose fabricated from thermo-groundwood (removal of extractives, lignin and hemicelluloses, TEMPO oxidation and homogenization processes were included) was evaluated by means of a Life Cycle Assessment. The results show that the purification process contributes more than 95% of the impact. It is associated with a relatively high consumption of electrical energy and ancillary chemicals, i.e., cyclohexane and acetone. The global warming potential of 1?kg of nanofibrillated cellulose is as high as 800?kg CO2 equivalents. Even in the case that in addition to the extractives and the hemicelluloses also lignin is considered as a potentially valuable co-product, and the latter takes over some of the burden, the impact of nanofibrillated cellulose remains relatively high, at around 400?kg CO2 equiv. per kg of nanocellulose. While the primary energy consumption is around 19.000?MJ per kg of nanofibrillated cellulose, or 10.100?MJ in the case that the lignin is considered as a potentially valuable co-product. The study also had a methodological goal, i.e., the impact indicators were calculated using the three most relevant evaluation methods: ILCD/PEF, CML 2001 and ReCiPe 2016. These three methods show similar results for the impact on global warming and acidification. However, in the case of impacts on some other indicators, significant deviations in the obtained impact scores were observed with respect to the results for the three methods. Taking into account the background data of the methods, ReCiPe 2016 was found to be the most up-to-date method and can currently be considered as the preferable Life Cycle Impact Assessment method.

服务人员 尚玮姣

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