The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route

Citation

Leong, Loong Kong and Chin, K. S. and Yap, Taufiq Yun Hin (2011) The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route. Catalysis Today, 164 (1). pp. 341-346. ISSN 0920-5861

Abstract

A series of 1%, 3% and 5% Bi-doped vanadyl pyrophosphate catalysts were prepared via sesquihydrate route (VPOs method). These catalysts were denoted as VPOs-Bi1%, VPOs-Bi3% and VPOs-Bi5%. Bulk and Bi-promoted vanadyl pyrophosphate catalysts prepared via sesquihydrate route exhibited a well-crystallized (VO)2P2O7 phase. Two V5+ phases, i.e. β-VOPO4 and αII-VOPO4 were observed in all Bi-promoted VPO catalysts, which led to an increase in the specific surface area and average oxidation state of vanadium. Bi-promoted VPO catalysts showed six to nine times higher amounts of oxygen evolved than the bulk VPO catalyst in oxygen TPD and a significant shift in the reduction peaks to lower temperatures. Catalytic tests revealed that both activity and selectivity to maleic anhydride increased with the presence of bismuth promoter.

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Additional Metadata

Item Type:	Article
Divisions:	Faculty of Science
DOI Number:	https://doi.org/10.1016/j.cattod.2010.10.029
Publisher:	Elsevier
Keywords:	Vanadyl pyrophosphate; Bismuth; Selective oxidation
Depositing User:	Nur Farahin Ramli
Date Deposited:	19 Sep 2013 06:27
Last Modified:	28 Nov 2016 09:24
Altmetrics:	http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.cattod.2010.10.029
URI:	http://psasir.upm.edu.my/id/eprint/24626
Statistic Details:	View Download Statistic

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