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Performance of the CeZrO2 mixed oxide in the NOx decomposition

✍ Scribed by E.B. Silveira; C.A.C. Perez; M.A.S. Baldanza; M. Schmal

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
428 KB
Volume
133-135
Category
Article
ISSN
0920-5861

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✦ Synopsis

The present work aims to evaluate the performance of the CeZrO 2 mixed oxide for the NO x decomposition in the absence of a noble metal. The Ce 75 Zr 25 O 2 mixed oxide was prepared by co-precipitation of hydroxides and was characterized by X-ray diffraction (XRD) before and after pretreatments, thermogravimetric analysis (TG) and temperature programmed desorption of NO (TPD). XRD results allowed confirming the formation of a solid solution. TG results showed slight loss of mass during the reduction of the mixed oxide. TPD results showed NO decomposition even at room temperature either for reduced or calcined samples, however a significant decrease of the temperature of the NO decomposition besides an increasing amount of N 2 for the reduced sample, which is attributed to superficial structure changes of the mixed oxide.

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