fulltext.study @t Gmail

Soft chemical transformation of α-MoO3 to β-MoO3 as a catalyst for vapor-phase oxidation of methanol

Paper ID Volume ID Publish Year Pages File Format Full-Text
50222 46785 2011 4 PDF Available
Title
Soft chemical transformation of α-MoO3 to β-MoO3 as a catalyst for vapor-phase oxidation of methanol
Abstract

Monoclinic molybdenum trioxide, β-MoO3, was synthesized as an active catalyst for vapor-phase oxidation of methanol by a soft chemical transformation of α-MoO3. The addition of HNO3 to an aqueous solution of α-MoO3, followed by drying and calcination, resulted in the formation of yellow powders consisting of β-MoO3. The β-MoO3 content increased with the amount of HNO3, but the addition of excess HNO3 inhibited β-MoO3 formation. The maximum yield was obtained at a HNO3/Mo molar ratio of 0.37. Thermal analyses indicated that HNO3 controlled dehydration of the dried precursor to induce β-phase formation. The resulting β-MoO3 had a higher activity than α-MoO3 in the partial oxidation of methanol to formaldehyde at temperatures below 600 K.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► β-MoO3 was synthesized by a soft chemical transformation of α-MoO3. ► The key to the synthesis was the addition of HNO3 to an aqueous solution of α-MoO3. ► HNO3 controlled dehydration of the dried precursor to crystallize β-MoO3. ► The resultant β-MoO3 was highly active in the low-temperature oxidation of methanol.

Keywords
α-MoO3; β-MoO3; Partial oxidation; Methanol; Formaldehyde
First Page Preview
Soft chemical transformation of α-MoO3 to β-MoO3 as a catalyst for vapor-phase oxidation of methanol
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 13, Issue 1, 5 October 2011, Pages 10–13
Authors
, , , , ,
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