In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst

A. D. Soejarto; G. W. Coulston; G. L. Schrader

doi:10.1002/cjce.5450740507

In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst

A. D. Soejarto, G. W. Coulston, G. L. Schrader

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

A VPO catalyst prepared in an organic medium has been studied by in situ laser Raman spectroscopy for n-butane oxidation to maleic anhydride. Data could be obtained at low laser power and brief collection times. Raman characterization during continuous flow (steady-state) studies revealed that (VO)₂P₂O₇ was present. Sequential oxidizing (10% O₂ in N₂) and reducing (2% n-butane in N₂) conditions were explored at 350°C and 400°C. These cycling (unsteady-state) operations revealed that formation of V(5⁺) phases was enhanced during oxidizing conditions. The intensity of Raman bands due to (VO)₂P₂O₇ increased during reducing conditions.

Original language	English (US)
Pages (from-to)	594-599
Number of pages	6
Journal	Canadian Journal of Chemical Engineering
Volume	74
Issue number	5
DOIs	https://doi.org/10.1002/cjce.5450740507
State	Published - 1996
Externally published	Yes

Keywords

In situ Raman spectroscopy
Selective oxidation

ASJC Scopus subject areas

General Chemical Engineering

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title = "In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst",

abstract = "A VPO catalyst prepared in an organic medium has been studied by in situ laser Raman spectroscopy for n-butane oxidation to maleic anhydride. Data could be obtained at low laser power and brief collection times. Raman characterization during continuous flow (steady-state) studies revealed that (VO)2P2O7 was present. Sequential oxidizing (10% O2 in N2) and reducing (2% n-butane in N2) conditions were explored at 350°C and 400°C. These cycling (unsteady-state) operations revealed that formation of V(5+) phases was enhanced during oxidizing conditions. The intensity of Raman bands due to (VO)2P2O7 increased during reducing conditions.",

keywords = "In situ Raman spectroscopy, Selective oxidation",

author = "Soejarto, {A. D.} and Coulston, {G. W.} and Schrader, {G. L.}",

year = "1996",

doi = "10.1002/cjce.5450740507",

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T1 - In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst

AU - Soejarto, A. D.

AU - Coulston, G. W.

AU - Schrader, G. L.

PY - 1996

Y1 - 1996

N2 - A VPO catalyst prepared in an organic medium has been studied by in situ laser Raman spectroscopy for n-butane oxidation to maleic anhydride. Data could be obtained at low laser power and brief collection times. Raman characterization during continuous flow (steady-state) studies revealed that (VO)2P2O7 was present. Sequential oxidizing (10% O2 in N2) and reducing (2% n-butane in N2) conditions were explored at 350°C and 400°C. These cycling (unsteady-state) operations revealed that formation of V(5+) phases was enhanced during oxidizing conditions. The intensity of Raman bands due to (VO)2P2O7 increased during reducing conditions.

AB - A VPO catalyst prepared in an organic medium has been studied by in situ laser Raman spectroscopy for n-butane oxidation to maleic anhydride. Data could be obtained at low laser power and brief collection times. Raman characterization during continuous flow (steady-state) studies revealed that (VO)2P2O7 was present. Sequential oxidizing (10% O2 in N2) and reducing (2% n-butane in N2) conditions were explored at 350°C and 400°C. These cycling (unsteady-state) operations revealed that formation of V(5+) phases was enhanced during oxidizing conditions. The intensity of Raman bands due to (VO)2P2O7 increased during reducing conditions.

KW - In situ Raman spectroscopy

KW - Selective oxidation

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In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst

Abstract

Keywords

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