Dechlorination of PCBs with Supercritical Water Hydrolysis

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Chikao Tsurumi¹  Tsutomu Sugeta²  Chiyoshi Kamizawa²  Makoto Okano¹  Akira Negishi¹  Katsuto Otake²  Takeshi Sako² 

[1] Shibaura Institute of Technology;National Institute of Materials and Chemical Research

关键词: Environmental Engineering;    Supercritical Water;    Dechlorination;    Polychlorinated Biphenyl;   

DOI  :  10.1252/jcej.32.830

来源: Maruzen Company Ltd

【 摘 要 】

References(4)Cited-By(16)Polychlorinated biphenyls (PCBs) were made harmless using supercritical water hydrolysis with an alkali catalyst such as sodium hydroxide. PCBs over a wide concentration range from 2wt% in transformer oil to pure state were dechlorinated to biphenyl and, in some parts, decomposed to phenol, gases and other small molecules at 30 MPa, 653–723 K, and 20–100 min of reaction time. Furthermore no dioxins were detected in both gaseous and liquid products. Supercritical water hydrolysis has advantages as follows: (1) it dechlorinates pure PCBs rapidly and completely, (2) it realizes the selective dechlorination of dilute PCBs in transformer oil without thermal deterioration of the oil, and (3) it can reduce corrosion problems by neutralizing the product of hydrogen chloride.

【 授权许可】

Unknown