TY - JOUR
T1 - Low-temperature catalytic conversion of lignite
T2 - 2. Recovery and reuse of potassium carbonate supported on perovskite oxide in steam gasification
AU - Kim, Young Kwang
AU - Park, Joo Il
AU - Jung, Doohwan
AU - Miyawaki, Jin
AU - Yoon, Seong Ho
AU - Mochida, Isao
N1 - Funding Information:
This work was carried out within the framework of STEP CCT of NEDO, and with financial support from GCOE of Kyushu University and from NEDO and Kyushu University .
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2014/1/25
Y1 - 2014/1/25
N2 - 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°C. 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.
AB - 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°C. 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.
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U2 - 10.1016/j.jiec.2013.04.007
DO - 10.1016/j.jiec.2013.04.007
M3 - Article
AN - SCOPUS:84887611523
SN - 1226-086X
VL - 20
SP - 194
EP - 201
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 1
ER -