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EFFECT OF SOOT, TEMPERATURE AND RESIDENCE TIME ON PCDD/F FORMATION
Citation:
GRANDESSO, E., S. P. RYAN, B. K. GULLETT, AND D. G. TABOR. EFFECT OF SOOT, TEMPERATURE AND RESIDENCE TIME ON PCDD/F FORMATION. Presented at Dioxin 2006, Oslo, NORWAY, August 21 - 25, 2006.
Impact/Purpose:
presented paper
Description:
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are formed during thermal processes in the presence of fly ash that acts as an oxidation catalyst as well as a carbon and chloride source. Recent laboratory studies pointed out the importance of soot as a persistent carbon source as well as fly ash. We studied PCDD/F formation in a laboratory system. The testing conditions applied during this study were chosen to simulate the post-combustion zone. We applied the parameters that lead to higher PCDD/F production levels. The main variables in this study were sampling time and temperature in order to correlate PCDD/F formation rates with particulate carbon (soot) chlorination/oxidation rates in fly ash deposits.