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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 20, 2005
Accepted April 19, 2006

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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Li2ZrO3로 CO2 제거시 알칼리 첨가제 효과

Effects of Alkaline Additives on CO2 Removal by Li2ZrO3

박주원 강동환 조영도 유경선¹ 이재구² 김재호² 한춘^†

Joo-Won Park Dong-Hwan Kang Young-Do Jo Kyung-Seun Yoo¹ Jae-Goo Lee² Jae-Ho Kim² Choon Han^†

광운대학교 화학공학과, 139-846 서울시 노원구 월계동 447-1 ¹광운대학교 환경공학과, 139-846 서울시 노원구 월계동 447-1 ²한국에너지기술연구원 열공정연구센터, 305-343 대전시 유성구 장동 71-2

Department of Chemical Eng., Kwangwoon University, 447-1, Wolgae-dong, Nowon-gu, Seoul 139-846, Korea ¹Department of Environmental Eng., Kwangwoon University, 447-1, Wolgae-dong, Nowon-gu, Seoul 139-846, Korea ²Thermal Process Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea

chan@kw.ac.kr

Korean Chemical Engineering Research, October 2006, 44(5), 535-539(5), NONE Epub 14 November 2006

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Abstract

가연성 폐기물 가스화반응으로 생성되는 합성가스내의 CO2 제거반응에서 Li2ZrO3와 알칼리염 첨가제의 효과를 열중량 분석기를 이용하여 그 특성을 연구하였다. Li2ZrO3는 고체상태의 ZrO2와 Li2CO3를 합성하여 제조하였고, 반응성 향상을 위하여 K2CO3, Na2CO3, NaCl, LiCl 등의 알칼리염을 첨가한 후 열처리하여 사용하였다. 첨가한 알칼리염에 따른 반응성 향상은 K2CO3>NaCl>LiCl>Na2CO3 순으로 나타났고 이는 Li2CO3의 partial melting에 기인한 것으로 사료된다. 반응 시료의 SEM 분석 결과 용융상태의 존재를 확인할 수 있었고, XRD를 통해 첨가된 알칼리염들의 화학적 성분 변화는 일어나지 않는 것으로 확인되었다. NaCl을 사용한 경우 반응 초기에 60분 정도의 유도시간이 발생하였으며, Na2CO3가 첨가된 경우 700~750 ℃에서도 Li2ZrO3의 CO2 제거반응에 의해 생성된 Li2CO3의 분해가 유도되지 않아 반응성 감소현상이 나타나지 않았다.

Effects of alkaline additives on the CO2 removal reaction have been investigated by a thermogravimetric analyzer. Li2ZrO3 was synthesized by soild reaction of ZrO2 with Li2CO3 and then alkali chemicals were added to the synthesized Li2ZrO3 and then heat treatment was carried out. Addition of alkali chemicals enhanced the reactivity of Li2ZrO3 with the following order; K2CO3>NaCl>LiCl>Na2CO3, which were resulted from the formation of partially melted Li2CO3. SEM photographs showed the presence of melted state and the XRD results showed that the chemical states of added salts were not changed. Addition of NaCl caused the induction time of about 60 min at the initial reaction stage and the addition of Na2CO3 inhibited the decomposition of Li2CO3 at about 700~750 ℃.

Keywords

Li2ZrO3 Alkali Salts Partially Melting CO2 Removal Diffusion

References

Jing T, Niu Y, Zhong B, Fuel Process. Technol., 73, 175 (2001)
Rostrup-Nielsen JR, Catal. Today, 71(3-4), 243 (2002)
Yan QG, Weng WZ, Wan HL, Toghiani H, Toghiani RK, Pittman CU, Appl. Catal. A: Gen., 239(1-2), 43 (2003)
Kondo M, Journal of the Japan Institute of Energy, 32, 76 (2003)
Effendi A, Hellgardt K, Zhang ZG, Yoshida T, Catal. Commun., 4, 203 (2003)
Nakagawa K, Ohashi T, Proceedings-Electrochemical Society, 45, 370 (1998)
Xiong RT, Ida J, Lin YS, Chem. Eng. Sci., 58(19), 4377 (2003)
Ida J, Xiong R, Lin YS, Sep. Purif. Technol., 36, 41 (2004)
Ida J, Lin YS, Environ. Sci. Technol., 37, 1999 (2003)
Pfeiffer H, Knowles KM, J. European Ceram. Soc., 24, 2433 (2004)
Pineda M, Palacios JM, Alonso L, Garcia E, Moliner R, Fuel, 79, 885 (2001)
Horiuchi T, Hidaka H, Fukui T, Kubo Y, Horio M, Suzuki K, Mori T, Appl. Catal. A: Gen., 167(2), 195 (1998)