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Effects of acid leaching post-treatment on the catalytic performance of MoO3/mordenite-alumina catalysts for 1-butene metathesis reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
41389 45887 2011 7 PDF Available
Title
Effects of acid leaching post-treatment on the catalytic performance of MoO3/mordenite-alumina catalysts for 1-butene metathesis reaction
Abstract

Molybdenum oxide supported on mordenite zeolite-alumina composite is post-treated by nitric acid leaching with varying periods (12–48 h). The post-treated molybdenum catalysts display much higher stability for propene formation in 1-butene metathesis reaction. The evolution of Mo species has been characterized by laser Raman, 27Al MAS NMR and X-ray photoelectron spectroscopy. Characterization results have shown the extraction of aluminum molybdates (Al2(MoO4)3) after acid leaching post-treatment. This structural transformation relates to a transition in coke species on the spent molybdenum catalysts, and leads to the improvement in metathesis stability.

Graphical abstractMolybdenum oxide catalysts supported on mordenite zeolite-alumina (HM-Al2O3) compositive support are post-treated by nitric acid leaching at 298 K with different periods (12–48 h). The most dominant effect by acid leaching post-treatment lies in the extraction of aluminum molybdate (Al2(MoO4)3). With this structural transformation, catalysts can sustain 1-butene metathesis reactions with significantly improved stability in propene formation.Figure optionsDownload full-size imageDownload high-quality image (119 K)Download as PowerPoint slideHighlights► Acid leaching post-treatment improves the metathesis stability of MoO3/HM-Al2O3. ► Acid leaching extracts aluminum molybdate. ► Aluminum molybdate is detrimental for metathesis stability. ► Removal of aluminum molybdate causes transition in coke species.

Keywords
1-Butene metathesis; Mordenite-alumina; Acid leaching; Aluminum molybdate
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Effects of acid leaching post-treatment on the catalytic performance of MoO3/mordenite-alumina catalysts for 1-butene metathesis reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 404, Issues 1–2, 19 September 2011, Pages 113–119
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