Integrated Two-Stage Alkaline-Oxidative Pretreatment of Hybrid Poplar. Part 1: Impact of Alkaline Pre-Extraction Conditions on Process Performance and Lignin Properties
Integrated Two-Stage Alkaline-Oxidative Pretreatment of Hybrid Poplar. Part 1: Impact of Alkaline Pre-Extraction Conditions on Process Performance and Lignin Properties
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杂交杨的两阶段碱性氧化综合预处理。
DOI：
10.1021/acs.iecr.9b01124
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发表时间：
2019
影响因子：
4.2
通讯作者：
D. Hodge
中科院分区：
文献类型：
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作者：
S. Singh;Anthony W. Savoy;Zhaoyang Yuan;Hao Luo;S. Stahl;E. Hegg;D. Hodge
我们先前证明，包括碱性预提取，然后由铜催化的碱性氧化处理的两阶段预处理是有效的预处理硬木在相对温和的反应条件下。在这项工作中，我们专注于表征在碱预提取期间使用的生物质来源和反应条件如何影响后续加工阶段以及木质素产率和性质。具体地，在包括时间（15-300分钟）、温度（95-155 °C）和碱负载量（50-200 mg NaOH/g生物质）的差异的各种条件下，对三种杂交杨树进行第一阶段碱预提取，并确定对总质量溶解、木质素回收和木质素纯度的影响。在预萃取阶段，反应条件和质量增溶和木质素回收率之间建立了经验相关性。在选定的条件下，评估了木质素的性质，包括13 C NMR测定的β-O-4含量，分子量和分子量。
We previously demonstrated that a two-stage pretreatment comprising of an alkaline pre-extraction followed by a Cu-catalyzed alkaline–oxidative treatment is effective at pretreating hardwoods under relatively mild reaction conditions. In this work, we focus on characterizing how biomass source and reaction conditions used during the alkaline pre-extraction impact the subsequent processing stages as well as lignin yields and properties. Specifically, three hybrid poplars were subjected to the first stage alkaline pre-extraction under various conditions including differences in time (15–300 min), temperature (95–155 °C), and alkali loadings (50–200 mg NaOH/g biomass), and the impact on total mass solubilization, lignin recovery, and lignin purity was determined. Empirical correlations were developed between reaction conditions and mass solubilization and lignin recovery during the pre-extraction stage. For select conditions, lignin properties were assessed and include β-O-4 content determined by 13C NMR, mo...
DOI：
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发表时间：
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期刊：
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影响因子：
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作者：
A. Rahimi;A. Azarpira;H. Kim;J. Ralph;S. Stahl
通讯作者：
A. Rahimi;A. Azarpira;H. Kim;J. Ralph;S. Stahl