Articles & Issues

Language: korean

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

Publication history: Received February 4, 2010
Accepted March 4, 2010

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.

All issues

고압조건에서 Sn-Zr계 촉매상에서 SO2 촉매환원 반응특성

Reactivity of SO2 Catalytic Reduction over Sn-Zr Based Catalyst under High Pressure Condition

박정윤 박노국¹ 이태진^† 백점인² 류청걸²

Jung Yun Park No-Kuk Park¹ Tae Jin Lee^† Jeom-In Baek² Chong Kul Ryu²

영남대학교 디스플레이화학공학부, 712-749 경북 경산시 대동 214-1번지 ¹영남대학교 청정기술연구소, 712-749 경북 경산시 대동 214-1번지 ²한국전력공사 전력연구원, 305-380 대전광역시 유성구 문지동 103-16

School of Chemical Engineering & Technology, Yeungnam University, 214-1, Dae-dong, Gyeongsan-si, Gyeongbuk 712-749, Korea ¹Institute of Clean Technology, Yeungnam University, 214-1, Dae-dong, Gyeongsan-si, Gyeongbuk 712-749, Korea ²Korea Electric Power Research Institute, 103-16, Munji-dong, Yuseong-gu, Daejeon 305-380, Korea

Korean Chemical Engineering Research, June 2010, 48(3), 316-321(6), NONE Epub 5 July 2010

Download PDF

Abstract

본 연구에서는 고압조건에서 SO2를 원소 황으로 전환하기 위한 촉매환원반응이 수행되었다. SO2 환원을 위한 촉매로 Sn-Zr계 금속복합산화물 촉매를 사용하였으며, 환원제로 CO가 사용되었다. 촉매환원반응성을 조사하기 위하여 반응온도, 반응물의 몰비([CO]/[SO2]), 공간속도에 따른 SO2 전화율과 원소 황 수율 그리고 COS의 선택도를 상압조건과 20기압조건에서 비교되었다. 상압조건에서 SO2 전화율은 반응온도가 증가될수록 함께 증가되었으며, CO/SO2 몰비가 높을수록 증가되었다. 또한 SO2 전화율의 증가와 함께 COS의 선택도도 함께 증가되어, 원소 황 수율은 오히려 낮아졌다. 그러나 20 atm의 고압조건에서는 높은 SO2 전화율과 낮은 COS의 선택도가 얻어졌다. 이와 같은 결과는 높은 압력으로 인한 반응속도의 증가와 함께 생성된 원소 황이 응축되어 CO에 의한 COS 생성이 억제되었기 때문이라 판단된다. 이와 같은 결과로부터 SO2 촉매환원반응으로 높은 황 수율은 고압조건에서 더 유리하게 얻을 수 있다.

The SO2 catalytic reduction was carried out under the condition of high pressure in this study. Sn-Zr based oxide and CO were used as the catalyst and reducing agent for the reduction of SO2 to element sulfur, respectively. In order to compare the reactivity with the pressure on the catalytic process, the reactivity tests were performed under the conditions of atmospheric pressure and 20 atm. SO2 conversion, the element sulfur yield and COS selectivity were also_x000D_ compared with changing the reaction temperature, CO/SO2 mole ratio and the space velocity(GHSV). SO2 conversion increased with increasing temperature and CO/SO2 mole ratio under the condition of atmospheric pressure and element sulfur yield decreased due to the production of COS by the series reaction of CO and the produced sulfur. However, high SO2 conversion and high element sulfur were obtained under the condition of 20 atm. It was concluded that COS_x000D_ decreased due to the condensation of the produced element sulfur under the condition of high pressure. Therefore, the high sulfur yield for SO2 catalytic reduction could be profitably obtained under the condition of high pressure.

Keywords

SO2 Catalytic Reduction Direct Sulfur Recovery Sn-Zr Catalyst

References

Kohl AL, Riesenfeld FC, Gas Purification, 4rd ed., Gulf Publishing Company Book Division, Houston, (1985)
Lepsoe R, Ind. Eng. Chem., 30, 92 (1938)
Lepsoe R, Ind. Eng. Chem., 32, 910 (1940)
Haas LA, Khalafalla SE, J. Catal., 29, 264 (1973)
Paik SC, Kim H, Chung JS, Catal. Today, 38(2), 193 (1997)
Kim BS, Lee JD, Park NK, Ryu SO, Lee TJ, Kim JC, HWAHAK KONGHAK, 41(5), 572 (2003)
Han GB, Park NK, Ryu SO, Lee TJ, Korean Chem. Eng. Res., 44(4), 356 (2006)
Han GB, Park NK, Lee JD, Ryu SO, Lee TJ, Catal. Today, 111(3-4), 205 (2006)
Han GB, Shin BY, Lee TJ, J. Korean Ind. Eng. Chem., 18(2), 155 (2007)
Han GB, Park NK, Yoon SH, Lee TJ, Yoon KJ, Appl. Catal. A: Gen., 337(1), 29 (2008)
Han GB, Park NK, Yoon SH, Lee TJ, Chemosphere, 72, 1744 (2008)
Han GB, Park NK, Yoon SH, Lee TJ, Ind. Eng. Chem. Res., 47(5), 1427 (2008)
Han GB, Park NK, Yoon SH, Lee TJ, Han GY, Ind. Eng. Chem. Res., 47(14), 4658 (2008)
Zhang ZL, Geng HR, Zheng LS, Du B, Appl. Catal. A: Gen., 284(1-2), 231 (2005)