Preparation and Characterization of Rare Earth Composite Catalytic Materials for Conversion of Exhaust from Natural Gas Automobiles

Abstract:

A series of rare-earth composite catalytic material LZ1,LZ2 and LZ3 that contains mixture of La_0.9Sr_0.1Co_0.5Mn_0.5O₃ and Ce_0.7Zr_0.3O₂ in different proportion (3:7, 5:5, 7:3) were prepared by a sol-gel method and characterized by X-ray diffraction (XRD), specific surface analysis (BET) , Transmission electron microscopy (TEM) and temperature programmed reduction (TPR). The results indicated that in LZ3, a perfect crystal structure of perovskite and a cubic fluorite structure were formed. Besides LZ3 presented scattered spherical granules with a particle size of about 30 nm and a specific surface area of 20.9870 m²/g. The temperature of reduction peak was lowest (490°C) and peak area was larger, so it had the best catalytic activity for methane combustion.

• Periodical: Applied Mechanics and Materials (Volume 320)
• Pages: 413-418
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.320.413
• Online since: May 2013
• Authors: Yan Kun Yuan, Gang Xue, Sai Fei Wang, Xue Liang Zhang
• Keywords: Catalysis, Composite Material, Natural Gas, Rare Earth

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