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Ex-ante life cycle assessment framework and application to a nano-reinforced biopolymer film based on mango kernel
Resources, Conservation and Recycling ( IF 13.2 ) Pub Date : 2022-09-29 , DOI: 10.1016/j.resconrec.2022.106637
Jade Müller-Carneiro, Maria Cléa Brito de Figueirêdo, Carla Rodrigues, Henriette Monteiro Cordeiro de Azeredo, Fausto Freire

This article proposes a framework for ex-ante life cycle assessment (LCA) of biopolymers at low TRL, including: (i) scale-up; (ii) scenarios for processes and modelling choices; (iii) comparison with a fossil-based polymer, considering material substitution factors. The framework was applied to analyse a mango kernel starch (MKS) film and compare it with low-density polyethylene (LDPE). Mango seeds (feedstock) were modelled as burden-free since they do not have economic value (baseline). An industrial-scale model was built for the production of starch nanocrystals (SNC) and MKS film using process calculations based on experimental data. Most impacts occur at starch and SNC extraction due to steam and acid consumption. Compared to LDPE, MKS performs better in non-renewable energy use but worse in climate change, freshwater eutrophication, and terrestrial acidification. Scenario analysis showed that yield enhancement and acid shifting could considerably reduce impacts. The proposed framework shows potential to support sustainable innovation of biopolymers.



中文翻译:

基于芒果核的纳米增强生物聚合物薄膜的事前生命周期评估框架及应用

本文提出了低 TRL 下生物聚合物的事前生命周期评估 (LCA) 框架,包括: (i) 放大;(ii) 流程和建模选择的场景;(iii) 与基于化石的聚合物进行比较,考虑材料替代因素。该框架用于分析芒果核淀粉 (MKS) 薄膜并将其与低密度聚乙烯 (LDPE) 进行比较。芒果种子(原料)被建模为无负担,因为它们没有经济价值(基线)。使用基于实验数据的过程计算,建立了用于生产淀粉纳米晶体 (SNC) 和 MKS 薄膜的工业规模模型。由于蒸汽和酸的消耗,大多数影响发生在淀粉和 SNC 提取中。与 LDPE 相比,MKS 在不可再生能源利用方面表现更好,但在气候变化、淡水富营养化、和陆地酸化。情景分析表明,提高产量和酸转移可以大大减少影响。拟议的框架显示出支持生物聚合物可持续创新的潜力。

更新日期:2022-09-29
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