The enhancement of wood waste is a promising solution for the production of energy from renewable resources. Nevertheless, wood waste often needs a preliminary treatment step to remove pollutants present in the material. The thermal cleaning of wood laminated flooring (WLF) waste is studied through thermogravimetric and FTIR analyses. As a first step, it has been shown, through non iso-thermal tests, that degradation temperature ranges for wood and additives (aminoplast resins) are different, making it possible to proceed to a thermal cleaning through a low temperature pyrolysis. It has also been highlighted that chemical linkages between the different components of WLF waste influence their own thermal behaviour making it difficult to predict the thermal behaviour of the whole material. Fourier transform infra-red spectrometry analyses reveal that NH3 and HNCO are the main nitrogen-containing gases produced during pyrolysis, which highlights the pyrolysis efficiency in terms of nitrogen (i.e., resin) removing. Lastly, thermal degradation of wood and WLF has been modelled to provide information for reactor designing

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In this study, a pilot-scale rotary kiln was used to perform the pyrolysis of garden green waste. The results are compared to wood pellets (a mixture of oak and beech sawdust). Both samples have similar organic composition and energy content except for ash content which is around three times higher in the case of green waste. Pyrolysis tests were performed at different temperatures ranging from 700 to 900°C. The study of the products yields as a function of temperature showed that above 700°C, volatile matter (gas and bio-oil) yields were higher than 80 wt.% and syngas (CO+H 2) concentration was higher than 59 mol.%. On the other hand, the char yield was below 20 wt. % with an HHV of 29 MJ/kg and an 80% carbon content. Tar quantitative gas chromatography/mass spectrometry (GC/MS) analysis showed the predominance of benzene and naphthalene. Hence, this work revealed and validated the relevance of green waste thermochemical conversion for syngas production. In addition, this investigation can support the optimization of operating parameters and energy efficiency of a two-staged gasification process where pyrolysis is a decisive initial step.

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