PAH EMISSIONS FROM LIGNITE COMBUSTION - CASE-STUDY IN A MODEL FLUIDIZED-BED COMBUSTOR RESULTS WITH 4 TYPES OF TURKISH (SOMA) LIGNITES

Four kinds of local Turkish lignites (Lavvar, Kisrakdere, Eynez and Sa rikaya coal mines from Soma area) were burned in a model fluidized bed combustor (FBC) under different operating conditions. Combustion perf ormances of the FBC for these tests were determined in terms of the re gular parameters. Flue gases were sampled using an in-stack sampling t rain which collected the particulate and gaseous phase polycyclic arom atic hydrocarbons (PAH) separately. Collected samples were extracted, enriched, fractionated and analyzed by HPLC in accordance with EPA met hods. In the chromatogram 16 EPA priority PAH were identified, quantif ied, and the results were converted into concentrations of units of ma ss per cubic meter of slack gas corrected for standard conditions. Res ults were evaluated in terms of combustion parameters, segregation mod es in the FBC tests, partition between particulate and gaseous phases in the emitted flue gases, predominating PAH species and total PAH emi ssion Factors for the four lignites.