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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 3, 2008
Accepted October 24, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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2단 용융탄산염산화시스템에서 염소유기화합물 분해에 관한 연구

Study on Destruction of Chlorinated Organic Compounds in a Two Stage Molten Carbonate Oxidation System

은희철 양희철^† 조용준 이한수

Hee-Chul Eun Hee-Chul Yang^† Yung-Zun Cho Han-Soo Lee

한국원자력연구원, 305-353 대전시 유성구 덕진동 150

Korea Atomic Energy Research Institute, 150 Duckjin-dong, Yuseong-gu, Daejeon 305-353, Korea

Korean Chemical Engineering Research, December 2008, 46(6), 1148-1152(5), NONE Epub 29 December 2008

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Abstract

용융탄산염산화(MCO; Molten Carbonate Oxidation)는 염소유기화합물을 분해할 때 거의 대부분의 염소성분을 염내에 포집하여 다이옥신류 발생을 미연에 방지할 수 있기 때문에 염소유기화합물 처리를 위한 유망한 대체기술 중 하나로 고려되고 있다. 본 연구에서는 2단 용융탄산염산화시스템에서 염소유기화합물(C6H5Cl, C2HCl3 and CCl4)과 PCBs 함유 절연유의 분해에 관한 연구를 수행하였다. 용융탄산염산화반응기의 온도는 염소유기화합물 분해에 큰 영향을 미치는 것으로 확인되었다. 1차 용융탄산염산화반응기에서 염소유기화합물의 분해는 효과적이었다. 그러나 CO가 현저하게 높은 농도로 배출되었다. 이러한 CO 배출농도는 1차 반응기의 온도와 산화용 공기 주입량을 증가시킴에 따라 크게 감소되었다. 2단 용융탄산염산화시스템에서 HCl 배출농도는 모든 조건에서 7 ppm 이하였으며 염내 염소성분의 포_x000D_ 집효율은 99.95-99.99%였다. 절연유내 PCBs는 900 ℃ 이상의 온도에서 효과적으로 분해되었으며 PCBs의 총 분해효율은 99.9999% 이상이었다.

Molten carbonate oxidation (MCO) is one of the promising alternative technologies for the treatment of the chlorinated organic compounds because it is capable of trapping chlorine during a destruction of them. In this study, destructions of chlorinated organic compounds (C6H5Cl, C2HCl3 and CCl4) and an insulated oil containing PCBs were performed by using the two stage molten carbonate oxidation system. MCO reactor temperature largely affected the destruction of the chlorinated organic compounds. Destruction of the chlorinated organics very efficient in the primary MCO reactor however a significant amount of CO was emitted from the MCO system. This CO emission was gradually decreased by an increase in the primary reactor temperature and oxidizing air feed rate. The HCl emission from the MCO system was below 7 ppm regardless of tested conditions. The chlorine collection efficiencies were in the range of_x000D_ 99.95-99.99%. The destruction of PCBs in the insulated oil was efficient at a temperature above 900 ℃ and overall destruction efficiency of them was determined as over 99.9999%.

Keywords

Two Stage Molten Carbonate Oxidation System Chlorinated Organic Compound CO HCl PCBs

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