fulltext.study @t Gmail

Direct and efficient transformation of gaseous alkanes into carboxylic acids catalyzed by vanadium containing heteropolyacids

Paper ID Volume ID Publish Year Pages File Format Full-Text
43437 45969 2007 7 PDF Available
Title
Direct and efficient transformation of gaseous alkanes into carboxylic acids catalyzed by vanadium containing heteropolyacids
Abstract

The vanadium containing heteropolyacids H4[PMo11VO40] × 34H2O (HPA-1), H5[PMo10V2O40] × 32H2O (HPA-2) and H6[PMo9V3O40] × 34H2O (HPA-3) act as highly active catalysts for the direct transformation of light C1–C3 alkanes into the corresponding carboxylic acids in the presence of CO and in the K2S2O8/CF3COOH system. Propionic acid (ca. 70% yield), iso- and n-butyric acids (ca. 65% overall yield), and acetic acid (ca. 20%) are the major products obtained from the carboxylation of ethane, propane and methane, respectively, with vanadium playing a main catalytic role. The effects of the catalyst amount have been studied and overall turnover numbers (TONs) up to ca. 12 × 103 (for the ethane and propane conversions) or up to 3 × 103 (for the methane carboxylation to acetic acid) have been achieved for very high alkane-to-catalyst molar ratios which also promote the selectivity towards acetic acid.

Graphical abstractThe vanadium containing heteropolyacids H4[PMo11VO40] × 34H2O (HPA-1), H5[PMo10V2O40] × 32H2O (HPA-2) and H6[PMo9V3O40] × 34H2O (HPA-3) act as highly active catalysts for the direct transformation of light C1–C3 alkanes into the corresponding carboxylic acids in the presence of CO and in the K2S2O8/CF3COOH system. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Alkanes; C–H activation; Heteropolyacids; Vanadium; Carboxylation; Carboxylic acids; Homogeneous catalysis
First Page Preview
Direct and efficient transformation of gaseous alkanes into carboxylic acids catalyzed by vanadium containing heteropolyacids
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 332, Issue 1, 1 November 2007, Pages 159–165
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