화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.1, 194-201, January, 2014
DOI10.1016/j.jiec.2013.04.007  Export Citation
Low-temperature catalytic conversion of lignite: 2. Recovery and reuse of potassium carbonate supported on perovskite oxide in steam gasification
Young-Kwang Kim1, Joo-Il Park1, Doohwan Jung2, Jin Miyawaki3, Seong-Ho Yoon1, 3, †, and Isao Mochida3
  • 1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
  • 2New and Renewable Energy Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, South Korea
  • 3Institute of Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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Catalytic recovery after repeated uses of unsupported K2CO3 or K2CO3 supported on 3 kinds of perovskites (LaMn0.8Cu0.2O3, LaMn0.8Cu0.2O3/γ-alumina, and La0.9K0.1MnO3) was investigated during steam gasification of an Indonesian lignite (Adaro) at 700 ℃. Perovskite supports effectively retained K2CO3 and maintained higher catalytic activity than K2CO3 alone. The supported catalysts were recovered from the ash after gasification based on their size and ferromagnetism. Quartz and alumina accumulation on the catalyst poisoned the ash due to reactivity with potassium. Catalytic activity as high as 90% carbon conversion was maintained up to seven cycles, and separation from the ash after gasification regenerated the activity.
Keywords:Catalytic steam coal gasification;K2CO3;Catalyst recovery;Perovskite
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