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Main Title Thermal degradation products from dielectric fluids /
Author Erickson, Mitchell D. ; Erickson, M. D. ; Cole, C. J. ; Flora, J. D. ; Gorman, P. G. ; Haile, C. L.
Other Authors
Author Title of a Work
Kutz, Frederick W.
Heggem, Daniel T.
CORP Author Midwest Research Inst., Kansas City, MO.;Environmental Protection Agency, Washington, DC. Office of Toxic Substances.
Publisher U.S. EPA,
Year Published 1984
Report Number EPA Contract no. 68-02-3938; EPA 560/5-84-009; EPA-68-02-3938; MRI-8201-A
Stock Number PB85-138535
OCLC Number 41416780
Subjects Liquids ; Decomposition (Chemistry) ; Polychlorinated biphenyls ; Air--Pollution
Additional Subjects Insulating oil ; Transformers ; Combustion products ; Pyrolysis ; Air pollution ; Samples ; Industrial hygiene ; Degradation ; Thermal degradation ; Flammability testing ; Polychlorinated biphenyls ; Toxic substances ; Indoor air pollution ; Polychlorinated dibenzodioxins ; Polychlorinated dibenzofurans ; Dibenzodioxin/tetrachloro ; Dibenzofuran/tetrachloro
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJED  EPA 560-5-84-009 OCSPP Chemical Library/Washington,DC 08/10/2001
ELBD ARCHIVE EPA 560-5-84-009 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
NTIS  PB85-138535 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 90 p. : ill., 28 cm.
Electrical transformer fires can cause extensive smoke damage, especially when polychlorinated biphenyls (PCBs) are involved since they can form polychlorinated dibenzofurans (PCDFs) and other toxic by-products. To characterize the potential for by-product formation, this study was undertaken to optimize conditions for PCDF formation from PCBs and to study the potential for formation of PCDFs and polychlorinated dibenzodioxins (PCDDs) from combustion of selected dielectric fluids, including those contaminated with PCBs. A bench-scale thermal destruction system was used to combust the samples. The dielectric fluid was fed continuously using a syringe pump. The concentrations of CO, CO2, and O2 in the effluent were monitored continuously. The entire effluent from the thermal destruction system was passed through an XAD-2 trap to collect PCDFs and other semivolatile organics. The XAD-2 trap and a rinse of connective tubing were Soxhlet extracted. Extracts were cleaned using column chromatography to isolate the PCDFs and PCDDs. All samples were analyzed for PCDFs using HRGC/EIMS in the selected ion monitoring mode. The results of this work indicate that the optimum conditions for PCDF formation from PCBs are near 675C for 0.8 s or longer, with 8% excess oxygen. Under these conditions, percent levels of PCDFs are formed from mineral oil or silicone oil contaminated with PCBs at 5ppm or greater. PcDFs and PCDDs are also formed from a trichlorobenzene dielectric fluid which contained no detectable PCBs.
EPA 560/5-84-009 "Work Assignment no. 23. Interim Report no. 1. EPA Contract no. 68-02-3938. MRI Project no. 8201-A(23)." "November 19, 1984." "The work was done at Midwest Research Institute (MRI) during the period May 22, 1984 to November 19, 1984."