应用化学 ›› 2022, Vol. 39 ›› Issue (7): 1073-1082.DOI: 10.19894/j.issn.1000-0518.210227

• 研究论文 • 上一篇    下一篇

植物纤维的热裂解过程

郑泉兴1, 李巧灵1, 张柯2, 周培琛1, 刘江生1, 刘秀彩1, 黄朝章1, 李斌2, 许寒春1, 蓝洪桥1, 刘加增1, 马鹏飞1, 谢卫1(), 伊晓东3()   

  1. 1.福建中烟工业有限责任公司技术中心,厦门 361021
    2.中国烟草总公司郑州烟草研究院,河南 450001
    3.厦门大学化学化工学院,厦门 361005
  • 收稿日期:2021-05-11 接受日期:2021-10-13 出版日期:2022-07-01 发布日期:2022-07-11
  • 通讯作者: 谢卫,伊晓东
  • 基金资助:
    福建中烟工业有限责任公司科技项目(JSZXKJJH2020001)

Pyrolysis Process of Plant Fibers

Quan-Xing ZHENG1, Qiao-Ling LI1, Ke ZHANG2, Pei-Chen ZHOU1, Jiang-Sheng LIU1, Xiu-Cai LIU1, Chao-Zhang HUANG1, Bin LI2, Han-Chun XU1, Hong-Qiao LAN1, Jia-Zeng LIU1, Peng-Fei MA1, Wei XIE1(), Xiao-Dong YI3()   

  1. 1.Technology Center,China Tobacco Fujian Industrial Co. ,Ltd. ,Xiamen 361021,China
    2.Zhengzhou Tobacco Research Institute of CNTC,Zhengzhou 450001,China
    3.College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China
  • Received:2021-05-11 Accepted:2021-10-13 Published:2022-07-01 Online:2022-07-11
  • Contact: Wei XIE,Xiao-Dong YI
  • About author:xdyi@xmu.edu.cn
    xw10481@fjtic.cn
  • Supported by:
    the Science and Technology Project of China Tobacco Fujian Industrial Co., LTD(JSZXKJJH2020001)

摘要:

天然植物纤维的相对分子质量大且结构、成分复杂,因此导致其热裂解的产物种类和成分分布也较为复杂。通过快速热解-全二维气相色谱-飞行时间质谱(Py-GC×GC-TOF/MS),热重-红外(TG-FT-IR)联用和原位红外(in situ FT-IR)等技术手段研究了6种不同天然纤维的热裂解过程,分别对不同纤维种类的热裂解温度、产物分布和主要产物类型进行了充分的研究和讨论。 研究结果表明,纤维热解产物主要包括醇、醛、酮、酸、酯、碳氢化合物、脱水糖和CO2等,不同天然植物纤维的热裂解产物种类差异性明显,得到的主要产物类型均有所不同。 同时,原位红外光谱和时间质谱结果表明,热解产物与热解温度密切相关。 原位红外实验结果表明,当热解温度低于100 ℃时,纤维结构表面的吸附水发生脱附,但是纤维结构不发生明显变化,当热解温度区间在100~200 ℃时,温度对裂解过程影响不大,而当温度超过300 ℃以后,纤维热解反应加剧且表面结构发生明显变化,产物主要有醛和酮。

关键词: 植物纤维, 热裂解, 原位红外, 热重分析, 热解-全二维气相色谱-飞行时间质谱

Abstract:

The natural plant fiber has a large molecular weight and complex structure and composition, and its thermal cracking products and the composition distribution are also more complex. The fast pyrolysis-comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (Py-GC×GC-TOF/MS), thermogravimetry-Fourier transform infrared spectroscopy (TG-FT-IR), and in situ Fourier transform infrared spectroscopy (in situ FT-IR) methods were used to study the thermal pyrolysis process of six different natural fibers. The distribution of thermal pyrolysis products of different fibers under different pyrolysis temperatures was investigated and the product form was fully discussed. The research results show that the products of fiber pyrolysis mainly include alcohols, aldehydes, ketones, acids, esters, hydrocarbons, dehydrated sugars and CO2etc. The types of pyrolysis products of different natural plant fibers are obviously different, and the main product types obtained are all different. At the same time, the results of in situ infrared spectroscopy and mass spectrometry show that pyrolysis products are closely related to the pyrolysis temperature. The results of in situ infrared experiments show that when the pyrolysis temperature is lower than 100 ℃, the adsorbed water on the surface of the fiber structure is desorbed, but the fiber structure does not change significantly. When the pyrolysis temperature range is 100~200 ℃, the temperature has little effect toward the pyrolysis process. When the temperature exceeds 300 ℃, the fiber pyrolysis reaction intensifies and the surface structure changes significantly, and the main products are aldehydes and ketones.

Key words: Plant fiber, Thermal pyrolysis, In situ Fourier transform infrared spectroscopy, Thermogravimetry analysis, Thermogravimetry-Fourier transform infrared spectroscopy

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