In situ  laser raman spectroscopy during sequential oxidizing and reducing conditions for a vanadium‐phosphorous‐oxide catalyst | Zendy

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

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In situ laser raman spectroscopy during sequential oxidizing and reducing conditions for a vanadium‐phosphorous‐oxide catalyst

Author(s) -

Soejarto A. D.,

Schrader G. L.,

Coulston G. W.

Publication year - 1996

Publication title -

the canadian journal of chemical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 67

eISSN - 1939-019X

pISSN - 0008-4034

DOI - 10.1002/cjce.5450740507

Subject(s) - oxidizing agent , raman spectroscopy , maleic anhydride , vanadium , butane , catalysis , oxidation state , materials science , reducing agent , vanadium oxide , inorganic chemistry , analytical chemistry (journal) , oxide , chemistry , organic chemistry , metallurgy , optics , physics , copolymer , polymer

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) 2 P 2 O 7 was present. Sequential oxidizing (10% O 2 in N 2 ) and reducing (2% n ‐butane in N 2 ) 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) 2 P 2 O 7 increased during reducing conditions.

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