Catalytic combustion of SOFC stack flue gas over CuO and Mn2O3 supported by La0.8Sr0.2Mn0.67Cu0.33O3 perovskite. Issue 3 (6th October 2017)

• Record Type: Journal Article
• Authors: Sung, Jae Gi; Kim, Taewook; Jung, Han Kyu; Kim, Hwan; Chung, Jong Shik
• Is Part Of: AIChE journal. Volume 64:Issue 3(2018)
• Page Start: 940
• Page End: 949
• Publication Date: 2017-10-06
• Subjects: oxidation catalyst -- copper‐manganese oxide -- hopcalite -- methane SOFC -- SOFC stack flue gas; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.15980
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : An efficient oxidation catalyst was developed to increase the combustion efficiency of unreacted CO, H2, and CH4 in flue gas of solid oxide fuel cell (SOFC) stack. Amorphous Cu‐Mn oxide catalyst (CuMnLa/Alumina) showed high catalytic activity, but significant degradation occurred due to phase transition to spinel structure at high temperatures (T > 650°C). La0.8 Sr0.2 Mn0.67 Cu0.33 O3 perovskite (LSMC(p)) supported CuO or Mn2 O3 exhibited improved thermal stability than CuMnLa/Alumina catalyst. Especially in case of 50Mn/LSMC(p), after the catalyst was exposed to 800°C for 24 h, T50 of CO, H2 and CH4 was achieved at 170, 230, and 600°C, respectively. This result is much lower than that of CuMnLa/Alumina, which was exposed to the same condition. The high combustion efficiency is due to retention of the Cu 2+ ‐Mn 3+ redox couple, and supply of lattice oxygen from LSMC(p), especially at high temperature. © 2017 American Institute of Chemical Engineers AIChE J, 64: 940–949, 2018