棉秆通过快速热解生产生物基左旋葡聚糖的生命周期评估。
Life cycle assessment of bio-based levoglucosan production from cotton straw through fast pyrolysis.
机构信息
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China; College of Forestry, Northwest A&F University, Yangling 712100, China.
School of Engineering, University of Glasgow, Glasgow, UK.
出版信息
Bioresour Technol. 2020 Jul;307:123179. doi: 10.1016/j.biortech.2020.123179. Epub 2020 Mar 13.
This study aimed to evaluate the environmental impacts (i.e. global warming potential (GWP) and resource depletion (RD)) of the bio-based levoglucosan production process through fast pyrolysis of cotton straw via life cycle assessment (LCA). An LCA model consisting of feedstock transportation, biomass pretreatment, fast pyrolysis, bio-oil transportation, bio-oil recovery and levoglucosan extraction was developed. Results indicated that GWP and RD of bio-based levoglucosan production were approximately 2 and 32.5 times less than that of the petroleum-based counterpart. Sensitivity analysis showed that the GWP and RD of levoglucosan production were highly sensitive to plant size, hydrochloric acid usage, cooling energy, levoglucosan yield and bio-oil yield. The results of this research could provide a framework for robust decision making at an industrial level, which is useful for the commercial-scale production of levoglucosan.
本研究旨在通过生命周期评估（LCA）评估棉秆快速热解制备左旋葡聚糖的生物基工艺的环境影响（即全球变暖潜能值（GWP）和资源消耗（RD））。建立了一个包含原料运输、生物质预处理、快速热解、生物油运输、生物油回收和左旋葡聚糖提取的 LCA 模型。结果表明，生物基左旋葡聚糖生产的 GWP 和 RD 分别约为石油基对应物的 2 倍和 32.5 倍。敏感性分析表明，左旋葡聚糖生产的 GWP 和 RD 对工厂规模、盐酸用量、冷却能耗、左旋葡聚糖收率和生物油收率高度敏感。本研究的结果可为工业层面的稳健决策提供框架，有助于左旋葡聚糖的商业化生产。
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