Pyrolysis Process of Plant Fibers

doi:10.19894/j.issn.1000-0518.210227

Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (7): 1073-1082.DOI: 10.19894/j.issn.1000-0518.210227

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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.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)

Abstract

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 CO₂， etc. 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

CLC Number:

O629

Quan-Xing ZHENG, Qiao-Ling LI, Ke ZHANG, Pei-Chen ZHOU, Jiang-Sheng LIU, Xiu-Cai LIU, Chao-Zhang HUANG, Bin LI, Han-Chun XU, Hong-Qiao LAN, Jia-Zeng LIU, Peng-Fei MA, Wei XIE, Xiao-Dong YI. Pyrolysis Process of Plant Fibers[J]. Chinese Journal of Applied Chemistry, 2022, 39(7): 1073-1082.

Figures/Tables 8

Fig.1 The GC×GC-TOF/MS two-dimensional chromatograms of the pyrolysis products obtained by rapid pyrolysis of fibers at 350 ℃

Fig.2 Composition of pyrolysis products of different fibers at 350 ℃

Fig.3 （A） The distribution of hydroxyl acetaldehyde （HAA）， hydroxyl acetone （HA） and 1， 3-dihydroxy-2-acetone （DHA） formed by pyrolysis of different fibers at 350 ℃. （B） The distribution of furfural （FF）， 5-hydroxymethyl furfural （5-HMF） and 2（5H） -furanone （FO） formed by pyrolysis of different fibers at 350 ℃

Fig.4 Three-dimensional infrared spectra of pyrolysis gas products of different plant fibers under N2 atmosphere with the heating rate of 10 K/min

Fig.5 Two-dimensional FT-IR spectra of pyrolysis gas products of different plant fibers in N2 atmosphere with the heating rate of 10 K/min

Fig.6 Three-dimensional FT-IR spectra of pyrolysis gas products of different plant fibers in O2/N2（V∶V=10∶100） atmosphere with heating rate of 10 K/min

Fig.7 FT-IR spectra of different fibers treated at different temperatures

Fig.8 FT-IR spectra of gas products of different fibers treated at different temperatures

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Pyrolysis Process of Plant Fibers

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