光谱学与光谱分析 |
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Influence of Urea Formaldehyde Resin on Pyrolysis of Biomass: A Modeling Study by TG-FTIR |
LI Si-jin, MU Jun*, ZHANG Yu |
Key Laboratory of Wooden Material Science and Application of Ministry of Education, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China |
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Abstract Pyrolysis is an efficient and recycling way to utilize waste wood-based panels, in which urea-formaldehyde resin (UF) is the main difference between wood-based board and other kinds of biomass. The present paper studied the three main components (cellulose, hemicelluloses, lignin) of poplar wood, in order to effectively and environmentally utilize or dispose of waste wood-based panels with pyrolysis technique, to study the influence of urea formaldehyde resin on pyrolytic characteristic of wood during the process of the pyrolysis of waste wood-based panels, and to in-depth explore the mechanism of the effect of UF on each component of wood. Innovatively, the weight-loss character and gas evolution rule of the model (made from cellulose, xylan and lignin, based on the chemical components stud of poplar wood), the main components as well as the ones mixed with UF were analyzed by TG-FTIR (thermogravimetric analyzer coupled to a Fourier transform infrared spectrometer). Results indicated that UF promoted the generation of water and carboxylic acid substances during the cellulose pyrolysis process. UF combined with lignin, formed some kind of unstable nitrogenous structure which produced a large amount of NH3, which took part in the low-temperature (200~300 ℃) pyrolysis of lignin, and directly affected the production of pyrolysis products. It can be concluded that during the process of the pyrolysis of waste wood-based panels, lignin was the one that UF mainly impacted among the three main components of wood.
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Received: 2013-11-29
Accepted: 2014-03-02
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Corresponding Authors:
MU Jun
E-mail: mujun222@sina.com
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