Abstract
The combustion of particleboard and glued veneer was studied in order to evaluate if there are any negative effects on the environment from incineration of waste with adhesive. The particleboard was made with urea formaldehyde (UF) resin and the veneers were glued with different types of adhesives, UF, polyvinyl acetate, emulsion polymer isocyanate (EPI), melamine urea formaldehyde (MUF) and phenol resorcinol formaldehyde. The combustion tests were carried out in a fluidised sand bed reactor with a good oxygen supply at temperatures between 500°C and 1000°C for particleboard and at 750°C and 850°C for glued veneer. The emissions were compared with the emissions from combustion of pure wood and pellets made from wood. The results show that the emissions from both particleboard and glued veneer are similar to the emissions from pure wood. The only main difference is that the nitrogen oxide (NOx) is increased when particleboard and nitrogen-containing adhesives, like UF, EPI and MUF, are combusted. The nitrogen from the adhesive is only to a minor extent converted to NOx, e.g. only 4% of the nitrogen in particleboard gives NOx.
Zusammenfassung
Untersucht wurde die Verbrennung von Holzspanplatten und verleimtem Furnier, um zu beurteilen, ob durch Verbrennung von Äbfällen mit Klebstoffen negative Auswirkungen auf die Umwelt entstehen. Die Holzspanplatte war mit Harnstoff- Formaldehyd – Harz (UF) hergestellt, und die Furniere waren mit verschiedenen Typen von Klebstoffen verleimt: UF, PVAC, EPI, MUF und PRF. Die Verbrennungsprüfungen wurden in einem Sandbett Reaktor durchgeführt, mit großzügiger Sauerstoffzufuhr bei Temperaturen zwischen 500°C und 1,000°C für die Holzspanplatte, sowie bei 750°C und 850°C für das verleimte Furnier. Die Emissionen wurden verglichen mit denjenigen der Verbrennung von reinem Holz und Holzpellets. Die Ergebnisse zeigten, dass beide Emissionen, von Holzspanplatten und verleimtem Furnier, denjenigen von reinem Holz glichen. Der einzige deutliche Unterschied besteht darin, dass NOx erhöht ist, wenn Spanplatten und stickstoffhaltige Klebstoffe, wie UF, EPI und MUT verbrannt werden. Der Stickstoff in den Klebstoffen wird nur in geringem Maße in NOx umgewandelt, z. B. nur 4% des Stickstoffs in Holzspanplatten ergibt NOx.
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Acknowledgements
The combustion tests were made at the Swedish National Testing and Research Institute (SP) by Lars Martinsson and Jessica Samuelsson. The study of the emission from particleboard was partly funded by Swedish Wood Panel Organization AB.
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Risholm-Sundman, M., Vestin, E. Emissions during combustion of particleboard and glued veneer. Holz Roh Werkst 63, 179–185 (2005). https://doi.org/10.1007/s00107-004-0549-z
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DOI: https://doi.org/10.1007/s00107-004-0549-z