A Life Cycle Greenhouse Gas Model of a Yellow Poplar Forest Residue Reductive Catalytic Fractionation Biorefinery
A Life Cycle Greenhouse Gas Model of a Yellow Poplar Forest Residue Reductive Catalytic Fractionation Biorefinery
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DOI：
10.1089/ees.2021.0472
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发表时间：
2022-09
影响因子：
1.8
通讯作者：
Yuqing Luo;Robert M. O’Dea;Yagya Gupta;Jeffrey L. Chang;Sunitha Sadula;Li Pei Soh;Allison M. Robbins;D. Levia;D. Vlachos;Thomas H. Epps;M. Ierapetritou
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作者：
Yuqing Luo;Robert M. O’Dea;Yagya Gupta;Jeffrey L. Chang;Sunitha Sadula;Li Pei Soh;Allison M. Robbins;D. Levia;D. Vlachos;Thomas H. Epps;M. Ierapetritou
减少温室气体（GHG）排放的激励推动了木质纤维素生物质转化技术的发展，特别是与碳水化合物部分相关的技术。然而，提高整体生物质价值需要使用木质素并了解不同树木部分（叶子、树皮、树枝/小枝）对木质素、纤维素和半纤维素向增值产品的分解的影响。在这项工作中，我们探索了以黄杨为基础的综合生物精炼厂生产化学品的方法。黄杨（Liriodendron tulipiferaL.）是第二代生物质原料的理想候选者，因为它在美国东部分布相对广泛。在此，我们评估和比较了黄杨树叶、树皮和小枝/小枝中纤维素、半纤维素（木聚糖）和木质素的不同比例（无论是单独还是作为复合混合物）如何影响黄杨生物精炼厂的生命周期温室气体模型。例如，每吨小树枝、叶子和树皮的加工温室气体排放量分别减少了 1,110 千克二氧化碳 (CO2) 当量、654 千克二氧化碳当量和 849 千克二氧化碳当量。最后，敏感性分析说明了该生物精炼厂对原料木聚糖/葡聚糖比率和碳含量不确定性的鲁棒性。
The incentive to reduce greenhouse gas (GHG) emissions has motivated the development of lignocellulosic biomass conversion technologies, especially those associated with the carbohydrate fraction. However, improving the overall biomass valorization necessitates using lignin and understanding the impact of different tree parts (leaves, bark, twigs/branchlets) on the deconstruction of lignin, cellulose, and hemicellulose toward value-added products. In this work, we explore the production of chemicals from a yellow poplar-based integrated biorefinery. Yellow poplar (Liriodendron tulipiferaL.) is an ideal candidate as a second-generation biomass feedstock, given that it is relatively widespread in the eastern United States. Herein, we evaluate and compare how the different proportions of cellulose, hemicellulose (xylan), and lignin among leaves, bark, and twigs/branchlets of yellow poplar, both individually and as a composite mix, influence the life-cycle GHG model of a yellow poplar biorefinery. For example, the processing GHG emissions were reduced by 1,110 kg carbon dioxide (CO2)-eq, 654 kg CO2-eq, and 849 kg CO2-eq per metric ton of twigs/branchlets, leaves, and bark, respectively. Finally, a sensitivity analysis illustrates the robustness of this biorefinery to uncertainties of the feedstock xylan/glucan ratio and carbon content.