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Characterization and catalytic performance of vanadium supported on sulfated Ti-PILC catalysts issued from different Ti-precursors in selective catalytic reduction of nitrogen oxide by ammonia

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Abstract

Vanadium supported on sulfated Ti-pillared clay catalysts (STi-PILCs) issued from different Ti-precursors were investigated for selective catalytic reduction (SCR) of NO by NH3 in the presence of O2. The STi-PILCs supports were prepared by hydrolysis of a series of organic or inorganic Ti-precursors; Ti(OCH3)4, Ti(OC2H5)4, and TiCl4 with H2SO4, and then modified with vanadium introduced by impregnation method. The unpromoted and promoted vanadium pillared clays were characterized using chemical analysis, N2-physisorption, NH3-TPD, H2-TPR, and tested for SCR of NO by NH3. It was found that the textural and acidic properties of the STi-PILC materials are influenced by the nature of the Ti-precursor; and the use of Ti-methoxide allows the synthesis of STi-PILC with the highest acidity. The presence of vanadium on STi-PILC supports reduces their surface areas and porous volumes, creates new redox sites, and enhances the reducibility of the sulfate groups leading to better redox properties of the binary V-STi-PILCs. After vanadium addition, the STi-PILC materials issued from Ti(OCH3)4, exhibited higher NO reduction activity at high temperature. These results underline the importance of the Ti-precursor for the preparation of the STi-PILC support, and the role of vanadium to increase the redox properties of V-STi-PILC catalyst for the SCR of NO by NH3.

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Authors and Affiliations

  1. Département de Chimie, Faculté des Sciences de Tunis, Laboratoire de Chimie des Matériaux et Catalyse, Campus Universitaire, Tunis, 1060, Tunisia

    J. Arfaoui, L. Khalfallah Boudali & A. Ghorbel

  2. Institut Charles Gerhardt Montpellier, UMR 5253, CNRS-UM2-ENSCM-UM1, Equipe MACS, Ecole Nationale Supérieure de Chimie, 8, rue Ecole Normale, Montpellier Cedex 5, 34296, France

    G. Delahay

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  1. J. Arfaoui
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  2. L. Khalfallah Boudali
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  3. A. Ghorbel
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  4. G. Delahay
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Correspondence to J. Arfaoui.

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Arfaoui, J., Khalfallah Boudali, L., Ghorbel, A. et al. Characterization and catalytic performance of vanadium supported on sulfated Ti-PILC catalysts issued from different Ti-precursors in selective catalytic reduction of nitrogen oxide by ammonia. J Mater Sci 44, 6670–6676 (2009). https://doi.org/10.1007/s10853-009-3674-6

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  • DOI: https://doi.org/10.1007/s10853-009-3674-6

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