The behaviour of phosphorus in flue gases from coal and secondary fuel co-combustion

The results of fuel and fly ash analysis showed an increased content of phosphorus during the co-combustion conditions. The analysis of the fine particulate matter showed a high phosphorus concentration on particles smaller than 0.9 μm. A considerable phosphorus concentration on particle fractions smaller than 0.05 μm is a clear indication of the presence of gaseous phosphorus compounds. These are expected to have a high deactivation potential on the SCR catalysts.