K^(+),Ca^(2+),Fe^(2+)催化β-O-4木质素多聚体模型化合物的快速热解特性研究  

Study on the Characteristic ofβ-O-4 Lignin Polymer Model Compound Fast Pyrolysis Catalyzed by K^(+),Ca^(2+),Fe^(2+)

作　　者：郭以琳 殷黎 冷尔唯 龚勋[2] 陈敬炜 鄂加强[1] GUO Yi-Lin;YIN Li;LENG Er-Wei;GONG Xun;CHEN Jing-Wei;E Jia-Qiang(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;State key laboratory of coal combustion,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]湖南大学机械与运载工程学院,长沙410082 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《工程热物理学报》2021年第12期3073-3082,共10页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52006060)。

摘　　要：为揭示C_(a)官能团和金属离子对木质素热解过程的影响机制,本研究合成了两种β-O-4型木质素多聚体模型化合物(C_(a)上分别连接羰基和羟基官能团),开展了在不同温度(500℃、650℃、800℃)和不同金属离子(K^(+)、Ca^(2+)、Fe^(2+))醋酸盐催化的Py-GC-MS快速热解实验。实验结果表明,C_(β)-O键比C_(a)-C_(β)键更容易断裂发生均裂反应产生较多的酚类化合物;添加K^(+)、Ca^(2+)、Fe^(2+)金属离子均能降低热解时所需温度,促进酚类产物的生成,抑制茴香基(醛)类和乙酰苯基类产物的生成。In order to reveal the mechanism of the influence of C_(a) functional groups and metal ions on the pyrolysis process of lignin,this study synthesized twoβ-O-4 type lignin polymer model compounds(Ca connected to carbonyl and hydroxyl functional groups respectively),and carried out Py-GC-MS fast pyrolysis experiment catalyzed by acetate at different temperatures(500℃,650℃,800℃)and different metal ions(K^(+),Ca^(2+),Fe^(2+)).The experimental results show that the Cβ-0 bond is easier to break than the Ca-Cβ bond.The homolytic reaction produces more phenolic compounds;the addition of K^(+),Ca^(2+),Fe^(2+)metal ions can reduce the temperature required during pyrolysis,promote the generation of phenolic products,inhibited the formation of anisyl(aldehyde)and acetophenyl products.

关 键 词：热解 木质素模型化合物 K^(+) CA^(2+) Fe^(2+) 

分 类 号：TK6[动力工程及工程热物理—生物能]