Effect of reaction conditions on hydrothermal degradation of cornstalk lignin
Effect of reaction conditions on hydrothermal degradation of cornstalk lignin
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DOI：
10.1016/j.jaap.2011.12.005
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发表时间：
2012-03
影响因子：
6
通讯作者：
Yueyuan Ye;Juan Fan;Jie Chang
中科院分区：
文献类型：
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作者：
Yueyuan Ye;Juan Fan;Jie Chang
以玉米秸秆木质素为原料，在温和的乙醇-水体系中进行水热解聚，制得高附加值的酚类物质。考察了停留时间(30min~180min)、反应温度(498K~573K)和乙醇浓度(0%~95%体积分数)对反应的影响。对液体产物和酚类化合物的产率进行了详细的研究。最佳工艺条件为523K、90min、65%体积分数。乙醇-水的液体产率最高(∼为70wt.%)。用气相色谱-质谱仪(GC-MS)对液体产物进行分析，确定存在主要的杂环(2，3-二氢苯并呋喃)和酚类物质(如乙基酚、愈创木酚、乙基愈创木酚和辛香酚)。反应条件对液体产物的产率和组成有显著影响。
Cornstalk lignin was hydrothermally depolymerized at mild conditions in ethanol–water for producing value-added phenolics. The effects of residence time (from 30min to 180min), reaction temperature (from 498K to 573K) and concentration of ethanol (from 0% to 95%vol.) on yields of liquid products and phenolic compounds were studied in detail. The optimal conditions of 523K, 90min and 65%vol. ethanol–water resulted in the highest yield of liquid products (∼70wt.%). The liquid products were analyzed by gas chromatography–mass spectrometry (GC–MS) to confirm the presence of primarily heterocycle (2,3-dihydrobenzofuran) and phenolics (such as ethylphenol, guaiacol, ethylguaiacol and syringol). Reaction conditions had significant effects on yield and composition of liquid products.