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Enhanced VOC oxidation over Ce/CoMgAl mixed oxides using a reconstruction method with EDTA precursors

Paper ID Volume ID Publish Year Pages File Format Full-Text
39713 45832 2014 8 PDF Available
Title
Enhanced VOC oxidation over Ce/CoMgAl mixed oxides using a reconstruction method with EDTA precursors
Abstract

•Ce-CoMgAl was prepared by two synthesis methods for the total oxidation of toluene.•Ce-CoMgAl synthesized by the reconstruction method provided a high activity.•VOC oxidation is significantly influenced by the preparation method.•The reconstruction method allows good distribution of promoted species.

CoMgAl hydrotalcites were synthesized as precursors of mixed oxides in order to obtain the oxidation catalysts of toluene. Additionally, mixed oxides were promoted with the incorporation of ceria which was carried out by two methods: the hydrotalcite reconstruction method using pre-synthesized cerium chelate as a precursor [Ce-EDTA]−1; and by the traditional technique of wetness impregnation with Ce nitrate. The effect of the Ce element on the solid's physical properties and catalytic performance was investigated. The final oxides were analyzed using inductively coupled plasma-optical emission spectrometry (ICP), specific surface area, X-ray diffraction (XRD), temperature programmed reduction with H2, (H2-TPR), X-ray photoelectron spectroscopy (XPS) and catalytic tests.The Ce-CoMgAl catalyst synthesized by the reconstruction method provided a good toluene conversion. It is demonstrated that the incorporation of ceria and the activity on VOC oxidation were significantly influenced by the preparation method of the promoted catalyst, the use of EDTA providing better activity because the methodology improves the redox properties of the catalyst.

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Keywords
Hydrotalcite; Toluene oxidation; VOCs; Reconstruction; Impregnation; Ce/CoMgAl
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Enhanced VOC oxidation over Ce/CoMgAl mixed oxides using a reconstruction method with EDTA precursors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 477, 5 May 2014, Pages 109–116
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us