Study on Clean Treatment of Urea-Formaldehyde Waste Using Fast Pyrolysis
A large amount of urea-formaldehyde (UF) resin waste is generated accompanied with discarded wood-based panels in China. In order to find out a safe and clean technology to recover these wastes, characterization of the nitrogen species released from fast pyrolysis of UF resin was investigated using PY-GC/MS.The results show that nitrogen atom trends to form nitrogen heterocyclic species rather than aliphatic species, especially at high temperature during UF fast pyrolysis. The number of produced species reaches its maximum when temperature was setto the range of 500-600 °C, the proper temperature range for wood fast pyrolysis. During UF resin fast pyrolysis, neither NO, NO2, N2O nor their precursors (HCN and HNCO) were observed. These substances were proven to be very harmful to the environment. Most produced nitrogen species havestrong antibacterial activity, andcan greatly enhance the high-valued utilization of bio-oil. Based on these, we concluded that fast pyrolysis is a promising technology to recover the UF resin waste in a safe and clean manner.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
J. S. Gou et al., "Study on Clean Treatment of Urea-Formaldehyde Waste Using Fast Pyrolysis", Advanced Materials Research, Vols. 194-196, pp. 2097-2104, 2011