BENZO(A)PYRENE EMISSION IN THE FLUE GAS FROM MODERN BIOMASS BOILERS

摘要

Polycyclic aromatic hydrocarbons (PAHs) are emitted during phases of incomplete combustion and arernconsidered particularly harmful to the human health. Benzo(a)pyrene (BaP) as a representative of PAHs is restrictedrnby the European Union to an annual average value of 1°ng/m³, which is significantly exceeded during heating seasonsrnin various regions. BaP emissions of sixautomatic state-of-the-art biomass boilers were assessed on the basis of therndilution method derived from ISO 11338-1. Correlations with other emission parameters were investigated. Thernemission behaviour in different operation phases (start, stop, full load and partial load operation) and real-lifernoperation scenarios from different boiler system types were determined and compared. Moreover the investigatedrntechnologies were compared with other heating technologies from literature concerning the BaP-emission behaviour.rnThis work delivers insight into the potential of BaP emissions of particularly modern biomass boilers.