Girods P, Dufour A, Rogaume Y, Rogaume C, Zoulalian A
LERMAB, Nancy-Université, UMR 1093, INRA, ENGREF, UHP, ENSTIB 27, rue du Merle Blanc, BP 1041, 88 051 Epinal, France.
J Hazard Mater. 2008 Nov 30;159(2-3):210-21. doi: 10.1016/j.jhazmat.2008.02.003. Epub 2008 Feb 12.
The removal of nitrogen from wood board waste through a low temperature pyrolysis (523-573 K) is investigated with two analytical methods. The kinetic study of the thermal behaviour of wood board and of its components (wood, UF and MF resins) shows the feasibility of removing thermally nitrogen from wood board waste. Indeed, the range of temperatures associated with the degradation of wood is different from the one obtained for the degradation of UF and MF resin. Isothermal conditions enable the determination of a kinetic model for degradation of wood board and of its components and demonstrate that the thermal behaviour of wood board is not the reflection of the sum of its components' behaviour. FTIR analysis of gas products confirms the feasibility removing nitrogen thermally and enables the evaluation of the optimum treatment conditions (temperature/duration). Elementary analysis of the treated samples and study of their low heating value (LHV) enable to quantify the efficiency of the thermal treatment in terms of nitrogen removal and of energy recovery. Results show that around 70% of the initial nitrogen can be removed from the waste, and that the temperature of treatment (between 523 K and 573 K) does not influence the efficiency in terms of nitrogen removal. Nevertheless, the ratio Residual energy/Initial energy (between 76% and 90%) is improved with the lowest temperature of treatment.
采用两种分析方法研究了通过低温热解（523 - 573 K）从木板废料中去除氮的情况。对木板及其组分（木材、脲醛树脂和三聚氰胺甲醛树脂）热行为的动力学研究表明，从木板废料中热去除氮是可行的。实际上，与木材降解相关的温度范围与脲醛树脂和三聚氰胺甲醛树脂降解所获得的温度范围不同。等温条件能够确定木板及其组分降解的动力学模型，并表明木板的热行为并非其各组分行为的简单加和。对气体产物的傅里叶变换红外光谱（FTIR）分析证实了热去除氮的可行性，并能够评估最佳处理条件（温度/持续时间）。对处理后样品的元素分析及其低热值（LHV）研究能够从氮去除和能量回收方面量化热处理的效率。结果表明，大约70%的初始氮可从废料中去除，并且处理温度（在523 K至573 K之间）对氮去除效率没有影响。然而，处理温度最低时，残余能量/初始能量的比值（在76%至90%之间）有所提高。
