Toxic Gas Emissions from Plywood Fires
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Toxic emissions from four construction plywoods were investigated using a freely ventilated cone calorimeter with raw predilution hot gas sampling. Each plywood sample was exposed to the conical heater of the cone calorimeter radiating at 35 kw/m2. Rich mixtures occurred in some of the tests, these rich mixtures produced high concentrations of toxic gases. The 4 samples had different peak heat release rate HRR, but similar steady state HRR. The elemental analysis of the four samples showed that they had different nitrogen content, indicating different glues were used. Plywood B had the highest N content of 6.43%, which resulted in the highest HCN concentration. The most important toxic species were CO, HCN, acrolein, formaldehyde and benzene on both an LC50 and COSHH15 min basis.
KeywordsToxicity Wood fires FTIR
The Petroleum Technology Development Fund, Nigeria and the University of Maiduguri are thanked for sponsoring the PhD of Bintu G. Mustafa. Thanks to Garry Fitzgibbon of Galliford Try for providing some of the test materials.
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