Abstract

It is the first time that looking for a waste material use and trying to get cheaper power with a lower consume of fossil fuel, a coal-tire blend (1:1 in organic matter) was burned in an atmospheric fluidised bed (AFB) combustion plant with an airflow of 860 1/h and 20% excess oxygen at three different combustion temperatures (750°C, 850°C, 950°C). The combustion conditions were the same that the ones performed in AFB coal combustion in order to compare the organic emissions obtained with both fuels. As the inorganic components in tire are less and in lower amount than in coal, the work was focused on organic emissions. Organic emissions from each run were trapped and from each sample, after extraction by ultrasonic bath with dimethylformamide (DMF), the content in polycyclic aromatic hydrocarbons (PAH) was determined by fluorescence spectroscopy in the synchronous mode (FS). It is concluded that the introduction of tire in the feeder implies an increase in total PAH amount-emitted respect to coal emissions. PAH emissions in the coal-tire blend combustion are in the range of 10–20 times greater than in the coal combustion, with minimum variations at the combustion temperatures studied in this work but the higher the temperature, the lower the PAH amount emitted.

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