Simple Search:

Activation of VOHPO4 · 0.5H2O in propane/air mixture: effect on structural, morphological, oxidant’s behaviour and catalytic property of (VO)2P2O7 catalysts for propane oxidation


Citation

Yap, Taufiq Yun Hin and Saw, Chaing Shen and Ramli, Irmawati (2005) Activation of VOHPO4 · 0.5H2O in propane/air mixture: effect on structural, morphological, oxidant’s behaviour and catalytic property of (VO)2P2O7 catalysts for propane oxidation. Catalysis Letters, 105 (1-2). pp. 103-110. ISSN 1011-372X; ESSN: 1572-879X

Abstract / Synopsis

VOHPO4 • 0.5H2O synthesized by VOPO4 • 2H2O and isobutanol was activated in a flow of propane/air mixture (1% propane in air) at 673 K for 36, 75 and 132 h. Three vanadyl pyrophosphate catalysts obtained were denoted as VPD36P, VPD75P and VPD132P. The crystallinity of all propane/air pretreated catalysts as shown in XRD increased with the duration of calcination. SEM micrographs showed the formation of more isolated platelets and more prominent rosebud-shape agglomerate as the pre-treatment was longer. Four reduction peaks maxima at 752, 920, 1026 and 1140 were observed in the rate of hydrogen consumption for VPD36P. As the calcination duration increased to 75 h, the H2 reduction peaks were shifted to lower temperatures at 750, 882, 1004 and 1140 K. When the calcination duration was further increased to 132 h, only three reduction peaks were observed at 752, 952 and 1142 K. Despite the progressively shifted of the major reduction peak maximum as the duration of calcination increased from 36 to 132 h, the lattice oxygen from VPD36P was found to be the most reactive. The catalytic performance for propane oxidation to acrylic acid (AA) showed that VPD36P gave the highest activity (9.6%) with 83.0% of selectivity to AA.


Download File

[img]
Preview
PDF (Abstract)
Activation of VOHPO4.pdf

Download (211kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1007/s10562-005-8012-2
Publisher: Springer
Keywords: Acrylic acid; Propane oxidation; Vanadyl pyrophosphate
Depositing User: Azwana Abdul Rahman
Date Deposited: 30 Oct 2011 01:54
Last Modified: 23 Nov 2016 09:25
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10562-005-8012-2
URI: http://psasir.upm.edu.my/id/eprint/18364
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item