Pyrolysis Process of Plant Fibers北大核心CSCD

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 pyrolysiscomprehensive 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 °C，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 °C，the temperature has little effect toward the pyrolysis process. When the temperature exceeds 300 °C，the fiber pyrolysis reaction intensifies and the surface structure changes significantly，and the main products are aldehydes and ketones. © 2022, Science Press (China). All rights reserved.

Pyrolysis Process of Plant Fibers

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.