Fundamental aspects of dioxin (PCDD) and furan (PCDF) from combustion. Final report

Technical Report · Wed Jul 01 00:00:00 EDT 1992

OSTI ID:10177692

Altwicker, E ^[1]

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1. Rensselaer Polytechnic Inst., Troy, NY (United States)

Formation of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) was investigated in a spouted bed combustor and in a low temperature fly ash reactor using plausible precursors. Combustion of chlorinated benzenes and chlorinated phenols yielded measurable quantities comparable in some instances to those observed in incinerators of PCDD/F as well as of many chlorinated benzene (CB) and chlorinated phenol (CP) isomers. In the absence of fly ash, the dominant PCDD appears to be OCDD (octa-chlorodibenzo-p-dioxin) favoring a gas phase mechanism. However, there is also evidence that the tetra-through-octa congeners of PCDD and PCDF were formed from the combustion of 1,2-dichlorobenzene. If this finding can be confirmed, it would agree with initial modeling results. Extensive work was done to establish the baseline performance of the combustor. A few experiments with a solid fuel, RDF (refuse-derived fuel) showed that PCDD/F could be readily formed; 1,2-dichlorobenzene and RDF produced similar distribution of chlorobenzene isomers. Separate studies in a fly ash reactor indicated that such diverse reactants as carbon and 1,2-dichlorobenzene can be precursors. When combustion products were passed over fly ash at low temperatures ({approximately}300 {degrees}C), PCDD and PCDF`s were also found. Modeling studies showed that drastic adjustments in model parameters were required to reconcile laboratory and incinerator findings.

• Research Organization: New York State Energy Research and Development Authority, Albany, NY (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)
• Sponsoring Organization: New York State Energy Research and Development Authority, Albany, NY (United States)
• OSTI ID: 10177692
• Report Number(s): NYSERDA-92-3; ON: TI92040380; IN: 858-ERER-MW-87
• Resource Relation: Other Information: PBD: Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FURANS
CHEMICAL REACTION YIELD
DIOXIN
ORGANIC CHLORINE COMPOUNDS
COMBUSTION
MUNICIPAL WASTES
PROGRESS REPORT
FLY ASH
INCINERATORS
COMBUSTORS
CHEMICAL REACTORS
PHENOLS
REFUSE DERIVED FUELS
COMBUSTION PRODUCTS
320604
540120
400800
MUNICIPAL WASTE MANAGEMENT
CHEMICALS MONITORING AND TRANSPORT
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY