Author : Lei Bai
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (986 download)
Book Synopsis Cyclodextrins as Additives for the Synthesis of Zirconia-supported Metal Oxide Catalysts for Formaldehyde Oxidation and Extension to the Preparation of Zirconia by : Lei Bai
Download or read book Cyclodextrins as Additives for the Synthesis of Zirconia-supported Metal Oxide Catalysts for Formaldehyde Oxidation and Extension to the Preparation of Zirconia written by Lei Bai and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volatile organic compounds, such as formaldehyde are currently health concern and their elimination into harmless compounds is of great importance. Different catalysts metal oxides have been developed to decompose formaldehyde under thermal treatments. The present work aims at developing cobalt and/or manganese oxides catalysts supported on zirconia designed for the deep oxidation of formaldehyde. The catalysts have been synthesized by classical wet impregnation method and the started metal solution has been modified by the controlled addition of cyclodextrins.The influence of different parameters, such as the metal precursor, the nature of the cyclodextrin nature and the amount of the cyclodextrin has been studied. A beneficial effect of cyclodextrins addition on the catalytic activity has been obtained and the role of the cyclodextrins at each stage of the preparation has been investigated (i.e. in impregnating solution, before activation and after activation). Interactions occurring in the aqueous phase between the cyclodextrin and the metal precursor modify the activation process leading to the formation of small particles size more active.As an extension, cyclodextrins have also been used to prepare by simple synthesis procedure of single-phase tetragonal zirconia. The stabilization of the tetragonal phase is suggested to occur via the formation of a composite material precursor composed of incorporated cyclodextrin within the polymeric zirconium hydroxide. Finally, the effect of the cyclodextrin modified zirconium hydroxide was adapted in the preparation of a very efficient mixed oxide MnOx-ZrO2 in the oxidation of formaldehyde.