Detoxification of PCBs Containing Transformer Oil by Catalytic Hydrodechlorination in Supercritical Fluids

Title
Detoxification of PCBs Containing Transformer Oil by Catalytic Hydrodechlorination in Supercritical Fluids
Authors
최혜민김재훈김재덕강정원
Keywords
초임계유체; 수첨탈염소화; PCBs; Supercritical fluid; Hydrodechlorination
Issue Date
2009-04
Publisher
청정기술; Clean technology.
Citation
VOL 15, NO 1, 9-15
Abstract
Catalytic hydrodechlorination of PCBs (polychlorinated biphenyls) included in the transformer oil was carried out to detoxify PCBs and to recycle the treated oil. Catalysts such as 0.98 wt% Pt and 0.79 wt% Pd on γ-alumina (γ-Al2O3) support, 12.8 wt% Ni on γ-Al2O3, and 57.6 wt% Ni on silica-alumina (SiO2-Al2O3) support were used for the catalytic hydrodechlorination. Various supercritical fluids such as carbon dioxide, propane and isobutane were used as reaction media. The effects of reaction temperature, reaction time, catalysts, and supercritical fluids on the catalytic hydrodechlorination were examined in detail. The detoxification degree increased in the order of Ni > Pd > Pt. This is possibly due to higher metal loading and larger metal size of the Ni catalyst. Below 175℃, scCO2 was found as the most effective reaction media for the catalytic hydrodechlorination of PCBs included in the transformer oil.
URI
http://pubs.kist.re.kr/handle/201004/35087
ISSN
1598-9712
Appears in Collections:
KIST Publication > Article
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