Decomposition process for polychlorobiphenyl containing 1 to 5 chlorine by using basic molten salts as reaction field

Osamu Takeda, Takeshi Handa, Masayoshi Kimura, Yasufumi Yokka, Yuzuru Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A decomposition process for PCBs by using basic molten salts as a reaction field was investigated in order to establish a safe, simple and highly efficient decomposition process for polychlorobiphenyls (PCBs). PCB containing chlorine (e.g. 2, 2×, 4, 4×-tetrachlorobiphenyl) dissolved in n-nonane solution was supplied into basic molten salts (NaOH-Na2CO3 or KOH-K2CO3) maintained at 500-700°C together with the carrier gas (N2-21% O2) through an injection tube. The injected PCBs in a bubble are decomposed by the reaction with the molten salts and oxygen during rise in the molten salts. The decomposition efficiency of PCBs increased with increasing temperature and was achieved to be higher than 99.995% in a certain condition. From a series of systematic study, the effectiveness of the decomposition process for PCBs by using molten salts was demonstrated.

Original languageEnglish
Title of host publicationExtraction and Processing Division - EPD Congress 2008 - Held during TMS 2008 Annual Meeting and Exhibition
Pages503-508
Number of pages6
Publication statusPublished - 2008 Oct 1
EventExtraction and Processing Division - EPD Congress 2008 - Held during TMS 2008 Annual Meeting and Exhibition - New Orleans, LA, United States
Duration: 2008 Mar 92008 Mar 13

Publication series

NameTMS Annual Meeting

Other

OtherExtraction and Processing Division - EPD Congress 2008 - Held during TMS 2008 Annual Meeting and Exhibition
CountryUnited States
CityNew Orleans, LA
Period08/3/908/3/13

Keywords

  • Molten salts
  • PCBs
  • Waste treatment

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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    Takeda, O., Handa, T., Kimura, M., Yokka, Y., & Sato, Y. (2008). Decomposition process for polychlorobiphenyl containing 1 to 5 chlorine by using basic molten salts as reaction field. In Extraction and Processing Division - EPD Congress 2008 - Held during TMS 2008 Annual Meeting and Exhibition (pp. 503-508). (TMS Annual Meeting).