Studies on Air Emissions from the Combustion of Wood-Waste

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Abstract
Experiments, under controlled conditions, were conducted on the coinbustion of wood waste to establish the effects of process variables on the emission of air pollutants. Temperature in the combustion zone was found to be the most important parameter affecting the combustion process and associated air pollutants. The amounts of air pollutants were minimal at combustion zone temperatures greater than 1100 °F. The hydrocarbons present in aerosol form in the exhaust gases were identified as abiatic acid and stearic acid. The gaseous hydrocarbon in the exhaust gases was mostly methane. The average combustion rate increased with increasing combustion zone temperature, with decreasing moisture content in the fuel, with increasing total air flow rate and with decreasing secondary to primary air ratio. The particle size in the wood-waste and the type of the grate were also found as important variables for the combustion process.

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