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PCDD/PCDF emissions from co-combustion of coal and PVC in a bubbling fluidised bed boiler

Authors
Journal
Fuel
0016-2361
Publisher
Elsevier
Publication Date
Volume
84
Issue
17
Identifiers
DOI: 10.1016/j.fuel.2005.07.009
Keywords
  • Co-Combustion
  • Bubbling Fluidised Bed
  • Gaseous Pollutants
  • Pcdd
  • Pcdf
Disciplines
  • Law

Abstract

Abstract This paper reports on the results obtained in the study of the co-combustion of PVC with hard coal from South Africa in a 0,5 MW th Bubbling Fluidised Bed Boiler. The research has included the study of the effect of combustion temperature, fluidisation velocity and PVC content. The addition of urea to the raw fuel, as a dioxin-preventing compound has also been evaluated. Results have been analysed in terms of combustion efficiency, major pollutants emission (NO x, CO), and PCDD/Fs formation in the flue gas and in the fly ash. Under the experimental conditions tested, co-combustion of coal and PVC has proved to be feasible from the combustion efficiency and emission of PCDD/Fs points of view, whose levels remained below limits set by existing legislation on persistent organic pollutants. The addition of solid urea to the fuel blend reduces the amount of chlorinated compounds emitted. However, it has a negative impact on nitrogen pollutants formation

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