Catalytic combustion of methane over SnCuO catalysts
Zhou, CJ; Lin, W; Zhu, YX; Xie, YC
AbstractCatalytic combustion of methane is an effective way to utilize it as an energy source, or to prevent it from polluting the atmosphere. It was found that the binary metal oxides based on SnO2 displayed quite high activity for the deep oxidation of methane. The binary SnCuO catalysts were prepared by a modified co-precipitation method and characterized by XRD, BET, XPS, DTA-TG and FT-IR. The catalytic activity of the catalysts for methane combustion as well as their resistance to sulfur poisoning were investigated. The results showed that the surface areas of all SnCuO catalysts are bigger than pure SnO2 or CuO, especially for the samples with n(Sn)/n(Cu)approximate to1, their specific surface areas are bigger than 100 m(2)/g. The catalytic activity of the catalysts at low temperature is higher than pure SnO2 or CuO. SnCu4 and SnCu5 with the biggest specific surface area show the highest catalytic activity. For sample SnCu4, the resistance to sulfur poisoning, which is an important factor for the catalysts, was also investigated. SO2 was added into the source gas (phi(SO2)=0.02%) and the catalytic activity was measured at 500 degreesC. The CH4 conversion was 98% at the beginning, but decreased gradually and kept stable after 12 h with CH4 conversion of 50%. The mechanism of sulfur poisoning was further studied by FT-IR and DTA-TG methods and it was found that the deactivation of the catalysts under SO2 is due to transformation of CuO into CuSO4.
KeywordMethane Catalytic Combustion Tin Oxide Copper Oxide Sulfur Poisoning
Indexed BySCI
WOS IDWOS:000182347400015
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhu, YX
AffiliationPeking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
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GB/T 7714
Zhou, CJ,Lin, W,Zhu, YX,et al. Catalytic combustion of methane over SnCuO catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(3):229-232.
APA Zhou, CJ,Lin, W,Zhu, YX,&Xie, YC.(2003).Catalytic combustion of methane over SnCuO catalysts.CHINESE JOURNAL OF CATALYSIS,24(3),229-232.
MLA Zhou, CJ,et al."Catalytic combustion of methane over SnCuO catalysts".CHINESE JOURNAL OF CATALYSIS 24.3(2003):229-232.
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