fulltext.study @t Gmail

Highly selective synthesis of cyclododecanone over mesostructured VSBA-15 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
41814 45901 2010 9 PDF Available
Title
Highly selective synthesis of cyclododecanone over mesostructured VSBA-15 catalysts
Abstract

Highly ordered VSBA-15 mesoporous catalysts have been synthesized under pH-adjusting direct hydrothermal (pH-aDH) method using vanadyl sulphate hydrate and Pluronic P123 as the sources of vanadium and template, respectively. The mesoporous catalysts characterized by sophisticated instrumental techniques, viz. ICP-AES, XRD, N2 adsorption, ESR, UV–vis DRS, 51V MAS NMR, 29Si MAS NMR and TEM show their two-dimensional mesostructures with tetrahedral vanadium species on the silica surface. The well ordered VSBA-15 catalysts have been used in the oxidation of cyclododecane (CDD) with hydrogen peroxide (H2O2, 30%) to find their catalytic activities. The regenerated VSBA-15 catalysts have been examined to find their catalytic stabilities. VSBA-15(5) catalyst has been washed with ammonium acetate solution to investigate the leaching of vanadium species in the framework of silica network of SBA-15, and the catalytic activity of washed VSBA-15(5) has also been examined in the catalytic reactions. Moreover, the hydrothermally stable VSBA-15(5) catalyst has also been examined in the catalytic reaction to find the effect of its catalytic activity. Additionally, the influences of various reaction parameters such as temperature, time, ratios of reactant and solvents on the oxidation of CDD have been investigated. Based on the catalytic results, VSBA-15(5) catalyst is found to be a highly active, recyclable and promising heterogeneous catalyst for selective synthesis of cyclododecanone (CDDO).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (72 K)Download as PowerPoint slideResearch highlights▶ Mesostructured VSBA-15 synthesized by pH-adjusting direct hydrothermal method. ▶ Characterization of VSBA-15. ▶ Catalytic oxidation of cyclododecane with hydrogen peroxide (30%) over VSBA-15 catalysts. ▶ Highly selective synthesis of cyclododecanone.

Keywords
VSBA-15; pH-adjusting direct hydrothermal method; Hydrothermal stability; Catalytic stability; Oxidation of CDD
First Page Preview
Highly selective synthesis of cyclododecanone over mesostructured VSBA-15 catalysts
Get Full-Text Now
Don't Miss Today's Special Offer
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 388, Issues 1–2, 20 November 2010, Pages 22–30
Authors
, ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
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