Citation: LEI Ze, SUN Yi, HAN Min-Fang, WANG Qi-Bao. Preparation, Characterization and Catalytic Activities of La_0.8Sr_0.2Fe_1-xSc_xO_3-δ Catalysts for Methane Combustion[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201206153 shu

Preparation, Characterization and Catalytic Activities of La_0.8Sr_0.2Fe_1-xSc_xO_3-δ Catalysts for Methane Combustion

1.
Research Center of Fuel Cell on Coal Gasification, School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, P. R. China

Received Date: 26 March 2012
Available Online: 15 June 2012
Fund Project: 国家自然科学基金(20806088)资助项目 (20806088)

Perovskite-type La_0.8Sr_0.2Fe_1-xSc_xO_3-δ (LSFS, x=0, 0.3, 0.4, 0.5, 0.6, 0.8, 1) catalysts were prepared by glycine-nitrate solution combustion. The catalysts were characterized by X-ray powder diffraction (XRD), H₂-temperature-programmed reduction (H₂-TPR), scanning electron microscopy (SEM), and specific surface area measurements. The catalytic performance of LSFS for methane combustion was investigated in a micro fixed-bed reactor. The results showed that all the LSFS catalysts have a single perovskite structure after calcining in air at 900 °C for 5 h. By doping Sc into La_0.8Sr_0.2FeO_3-δ, the sintering agglomeration between the LSFS particles is weakened, and therefore the specific surface area is increased. At Sc dopings of 0.4-0.6, the resultant LSFS gives od catalytic activity for methane combustion, with a light-off temperature (T₁₀) of 406 °C and a total conversion temperature (T₉₀) of 563 °C at a Sc doping of 0.5. Compared with La_0.8Sr_0.2FeO_3-δ and La_0.8Sr_0.2ScO_3-δ the T₁₀ is decreased by 14 and 87 °C, and T₉₀ is decreased by 59 and 95 °C, respectively.
- Methane,
- Catalytic combustion,
- Perovskite,
- Scandium,
- Strontium doped lanthanum ferrite
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation, Characterization and Catalytic Activities of La0.8Sr0.2Fe1-xScxO3-δ Catalysts for Methane Combustion

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通讯作者: 陈斌, bchen63@163.com

Preparation, Characterization and Catalytic Activities of La_0.8Sr_0.2Fe_1-xSc_xO_3-δ Catalysts for Methane Combustion