fulltext.study @t Gmail

Methanol to hydrocarbons over zeolites with MWW topology: Effect of zeolite texture and acidity

Paper ID Volume ID Publish Year Pages File Format Full-Text
41258 45882 2011 10 PDF Available
Title
Methanol to hydrocarbons over zeolites with MWW topology: Effect of zeolite texture and acidity
Abstract

MCM-36 and MCM-22 zeolites derived from the same precursor with MWW topology were compared for the conversion of methanol to hydrocarbons (MTH) at 450 °C. MCM-36 was found to be a very attractive catalyst, showing a selective formation of C3+ aliphatic hydrocarbons (about 90% at WHSV = 2 h−1) and a high resistance to the deactivation. Under similar conditions MCM-22 produced higher amount of aromatics and coke. This behavior was mainly related to the textural and acidic properties of catalysts. The dual meso-/microporosity of MCM-36 facilitates the diffusion of bulkier species produced by different reactions in the MTH process which results in lower deactivation rate of this zeolite compared to the purely microporous MCM-22 catalyst. Moreover, the density of the acid sites in MCM-36 (three times lower than that of the MCM-22 sample) is unfavorable to secondary reactions like aromatization and hydrogen transfer which are responsible for the formation of aromatics and coke precursors.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (138 K)Download as PowerPoint slideHighlights► MCM-36 zeolite was studied for the first time in the conversion of methanol to hydrocarbons. ► This catalyst produced selectively aliphatic hydrocarbons and exhibited a high resistance to the deactivation. ► Under similar conditions MCM-22 produced higher amount of aromatics and coke. ► These performances were related to the textural and acidic properties of catalysts.

Keywords
Methanol; Hydrocarbons; MCM-36; MCM-22
First Page Preview
Methanol to hydrocarbons over zeolites with MWW topology: Effect of zeolite texture and acidity
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: Applied Catalysis A: General - Volume 402, Issues 1–2, 31 July 2011, Pages 208–217
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