화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.39, No.11, 3032-3038, November, 2022
DOI10.1007/s11814-022-1194-0  Export Citation
Characterization and performance of SmxA1-xMnO3 (A=Ce, Sr, Ca) perovskite for efficient catalytic oxidation of toluene
Jing Hu, Jiabin Zhou†, Tianlei Zhang, Su Liu, and Ke Du1, †
  • School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
  • 1Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
E-mail:,
Catalytic oxidation of toluene was implemented over SmMnO3, Sm0.8A0.2MnO3 (ABO3, A=Ce, Sr, Ca) and Sm1-xCaxMnO3 (x=0.0, 0.1, 0.2, 0.3) perovskite oxides synthesized via sol-gel method. The effects of A-site substitution of SmMnO3 and the amount of calcium substitution of SmMnO3 perovskite-type catalyst on the catalytic activity of toluene were investigated in a fixed bed reactor. The structure and chemical properties of the perovskites were studied by XRD, SEM, XPS, and H2-TPR. The results showed that the substitution of Ce and Ca had a positive impact about the catalytic properties of toluene oxidation, while a negative impact was caused by the substitution of Sr. The catalytic activity of toluene oxidation followed the order of Sm0.8Ca0.2MnO3>Sm0.8Ce0.2MnO3>SmMnO3>Sm0.8Sr0.2MnO3 in terms of the temperature of T90%, at toluene concentration=1,000 ppm and weight hourly space velocity (WHSV)=3,000mL/ g·h. Sm0.8Ca0.2MnO3 had the highest catalytic capacity (T90%=238 ℃), which could be attributed to its high adsorbed oxygen concentration, Mn4+/Mn3+, and the best low-temperature reducibility (H2 consumption=0.36). Meanwhile, the Sm0.8Ca0.2MnO3 catalysts showed great long-term stability after 30 h of the reaction, and the toluene degradation rate remained over 95% at 350 ℃.
Keywords:Perovskite Catalyst;A-site Substitution;Catalytic Oxidation;SmMnO3;Adsorbed Oxygen
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