Influence of non-stoichiometry on diesel soot oxidation performance of SmxMn2O5 mullites
JIN Baofang1,2, WANG Yanshen1, LI Zhenguo3, MA Yue1, WU Xiaodong1*, RAN Rui1, WENG Duan1
(1 The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3 National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center, Tianjin 300300, China)
Abstract:
Three manganese based mullite-type mixed oxides (Sm0.8Mn2O5,SmMn2O5 and Sm1.2Mn2O5) with different samarium contents were synthesized by a sol-gel method. The catalysts were evaluated for catalytic oxidation performance of soot and characterized by XRD, BET, H2-TPR, O2-TPD and NO-TPO. The results showed that Sm/Mn ratio played important roles in the microstructure and catalytic oxidation performance of the synthesized catalysts. In the case of Sm/Mn
KeyWords:
mullite; non-stoichiometry; perovskite; soot oxidation
