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Kinetic modeling of the total oxidation of propane over anatase and vanadia sputter deposited catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
47966 46486 2009 12 PDF Available
Title
Kinetic modeling of the total oxidation of propane over anatase and vanadia sputter deposited catalysts
Abstract

Using an innovative magnetron sputter deposition technique, a set of titania (anatase), vanadia and vanadia–titania (anatase) based catalysts on porous SiO2 and non-porous SiO2–ZrO2 supports is prepared. These catalysts are tested for propane total oxidation at atmospheric pressure, a constant oxygen inlet partial pressure of 28.4 kPa and temperatures from 733 to 773 K. The inlet ratio of oxygen and propane is varied between 7.7 and 85.3 mol mol−1. A longer TiOx sputter deposition time has a beneficial effect on the propane total oxidation turnover frequency (TOF). Furthermore, the use of a porous support results in higher TOF. Starting from eleven possible rate equations, the one corresponding to a Mars–van Krevelen (MVK) mechanism, involving one active site in the reduction and reoxidation step, is globally the most significant. A pronounced compensation effect is observed for the rate coefficients of the reoxidation and reduction steps.

Keywords
BET, Brunauer–Emmett–Teller; ER, Eley–Rideal; ICP, inductively coupled plasma; LH, Langmuir–Hinshelwood; MVK, Mars–van Krevelen; N, non-porous; P, porous; TOF, turnover frequency; VOC, volatile organic compoundPropane total oxidation; Sputter deposited ca
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Kinetic modeling of the total oxidation of propane over anatase and vanadia sputter deposited catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 90, Issues 1–2, 25 July 2009, Pages 295–306
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
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100% Money Back Guarantee
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