| CaO/MgO复合固体碱催化剂催化降解木质素的研究 |
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| 引用本文： | 王研,陈咏梅,万平玉,韩雁明,秦特夫.CaO/MgO复合固体碱催化剂催化降解木质素的研究[J].林产化学与工业,2012,32(3):81-86. |
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| 作者姓名： | 王研 陈咏梅 万平玉 韩雁明 秦特夫 |
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| 作者单位： | 1. 北京化工大学 理学院 北京 100029;;2. 中国林业科学研究院 木材工业研究所 北京 100091 |
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| 基金项目： | 国家863计划资助(2010AA101703) |
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| 摘 要： | 在氧化镁载体上浸渍醋酸钙后烧结制备了CaO/MgO复合固体碱催化剂,所制固体碱催化剂的表面碱度与催化剂制备条件有关:当CaO/MgO比值为0.08、在700℃下煅烧时间24 h时制得的催化剂表面碱度可达到30.2 mmol/g。以该固体碱催化剂催化木质素中醚键断裂反应,测试结果表明木质素降解产物重均相对分子质量(Mw)可从3 000降低至800以下,羟值由200 mg/g增加至480 mg/g左右。FT-IR表征结果表明降解产物中醚键含量明显减少,羟基含量增多。
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| 关 键 词： | 木质素 固体碱催化剂 醚键 |
Degradation Behaviors of Lignin Catalyzed by CaO/MgO Composite as Solid Base Catalyst |
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| WANG Yan,CHEN Yong-mei,WAN Ping-yu,HAN Yan-ming,QIN Te-fu.Degradation Behaviors of Lignin Catalyzed by CaO/MgO Composite as Solid Base Catalyst[J].Chemistry & Industry of Forest Products,2012,32(3):81-86. |
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| Authors: | WANG Yan CHEN Yong-mei WAN Ping-yu HAN Yan-ming QIN Te-fu |
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| Institution: | 1.School of Science,Beijing University of Chemical Technology,Beijing 100029,China;2.Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China) |
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| Abstract: | CaO/MgO composite was prepared by impregnating Ca(CH3 COO)2 on MgO carrier.The surface basicity of the catalyst could reach 30.2 mmol/g under the ratio of CaO/MgO of 0.08 and calcination at 700 ℃ for 24 h.The catalytic activity of CaO/MgO powder was tested in degradation reaction of lignin.The results showed that the average molecular weight of lignin decreased from 3 000 to less than 800,and the hydroxyl value increased from 200 to more than 500.FT-IR spectra disclosed that the ether bonds were reduced,while hydroxyl bonds were increased significantly. |
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| Keywords: | lignin solid base catalysts ether bonds |
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