Study on the Pyrolysis Behaviors of Urea-Formaldehyde Resin and Rice Straw Mixed Pellets

In order to study the effect of biomass on the pyrolysis characteristics of urea-formaldehyde resin, the thermogravimetric experiments were carried out respectively using urea-formaldehyde resin (UF), rice straw (RS), and their mixed pellets with different proportions. The pyrolysis kinetics analysis was conducted. The results showed that the pyrolysis process of UF resin and mixed pellets could be divided into three stages: the drying and dehydration of the material, the rapid decomposition of volatile matter, and residue decomposition. The reaction order of UF resin and mixed pellets was discussed using the Coats–Redfern method, the activation energy of UF resin was 54.27 kJ/mol, and this value decreased with the addition of rice straw. As the mass ratio of UF resin to rice straw was 3:1, the activation energy achieved the lowest value, which means that the addition of rice straw was beneficial to the pyrolysis process of UF. In the process of pellet preparation, the falling strength and compressive strength of UF resin pellets can be improved by adding an appropriate proportion of rice straw. In this test, the yield of pyrolytic carbon reached the highest value of 23.93%, as the mass ratio of UF resin to rice straw was 3:2. When the mass ratio was 4:1, the highest liquid product yield of 43.21% was achieved.

[1]  S. Lam,et al.  Strategic hazard mitigation of waste furniture boards via pyrolysis: Pyrolysis behavior, mechanisms, and value-added products. , 2021, Journal of hazardous materials.

[2]  K. Chiang,et al.  Co-thermal degradation characteristics of rice straw and sewage sludge , 2021, Sustainable Environment Research.

[3]  Shu Zhang,et al.  Conversion and transformation of N species during pyrolysis of wood-based panels: A review. , 2020, Environmental pollution.

[4]  Xueli Chen,et al.  Effects of pelletizing conditions on the structure of rice straw-pellet pyrolysis char , 2020 .

[5]  Yu Zhang,et al.  Influence of Urea Formaldehyde Resin on the Pyrolysis of Biomass Components: Cellulose, Hemicellulose, and Lignin , 2018 .

[6]  Zhang Yang,et al.  Influence of a urea–formaldehyde resin adhesive on pyrolysis characteristics and volatiles emission of poplar particleboard , 2016 .

[7]  Dengyu Chen,et al.  Determination of pyrolysis characteristics and kinetics of palm kernel shell using TGA–FTIR and model-free integral methods , 2015 .

[8]  Yu Zhang,et al.  [Influence of urea formaldehyde resin on pyrolysis of biomass: a modeling study by TG-FTIR]. , 2014, Guang pu xue yu guang pu fen xi = Guang pu.

[9]  Y. Zhang Influence of UF resin and MUF resin on eucalyptus pyrolysis characteristics , 2014 .

[10]  Feng Yong-shu Pyrolysis characteristics of poplar particleboards containing UF resins , 2012 .

[11]  Y. Rogaume,et al.  Comparison of gasification and pyrolysis of thermal pre-treated wood board waste , 2009 .

[12]  Y. Rogaume,et al.  Thermal removal of nitrogen species from wood waste containing urea formaldehyde and melamine formaldehyde resins. , 2008, Journal of hazardous materials.

[13]  Y. Rogaume,et al.  Low-temperature pyrolysis of wood waste containing urea–formaldehyde resin , 2008 .