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Catalytic oxidation of vinyl chloride emission over LaMnO3 and LaB0.2Mn0.8O3 (B = Co, Ni, Fe) catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46033 46428 2013 8 PDF Available
Title
Catalytic oxidation of vinyl chloride emission over LaMnO3 and LaB0.2Mn0.8O3 (B = Co, Ni, Fe) catalysts
Abstract

The LaMnO3 and LaB0.2Mn0.8O3 (B = Co, Ni, Fe) perovskite-type oxides were prepared by the conventional co-precipitation method and studied as catalysts for the oxidation of vinyl chloride emission in the temperature range of 50–350 °C. Their physicochemical properties were characterized by ICP-AES, N2 adsorption, XRD, H2-TPR, O2-TPD and XPS. Catalytic performances were evaluated for the oxidation of 1000 ppm of VC in air at a GHSV of 15,000 h−1. The substituted LaB0.2Mn0.8O3 samples showed higher catalytic activity than pure LaMnO3. Characterization results revealed that the catalytic activity of the perovskite oxides was greatly related to the low-temperature reducibility of the B site and the amount of adsorbed oxygen species and vacancies on the surface. The surface adsorbed oxygen species played a key role in the catalytic reaction and oxygen vacancies promoted the oxygen mobility. A reaction mechanism of vinyl chloride oxidation over LaMnO3-based perovskite oxides was proposed.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► LaMnO3 and LaB0.2Mn0.8O3 (B = Co, Ni, Fe) were prepared by co-precipitation method. ► The B-site substitution increased the amounts of Mn4+ on the surface. ► No by-products were formed but only CO2, H2O and HCl. ► LaNi0.2Mn0.8O3 presented the best catalytic activity for vinyl chloride abatement. ► Reducibility, surface adsorbed oxygen and O2 mobility were the main parameters.

Keywords
CVOCs; Vinyl chloride; Catalytic oxidation; Perovskite; Reducibility; Adsorbed oxygen
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Catalytic oxidation of vinyl chloride emission over LaMnO3 and LaB0.2Mn0.8O3 (B = Co, Ni, Fe) catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 129, 17 January 2013, Pages 509–516
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us