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Determining an optimum catalyst for liquid-phase dehydration of methanol to dimethyl ether

Paper ID Volume ID Publish Year Pages File Format Full-Text
42798 45942 2008 7 PDF Available
Title
Determining an optimum catalyst for liquid-phase dehydration of methanol to dimethyl ether
Abstract

The liquid-phase dehydration of methanol to dimethyl ether was investigated over various materials including synthetic zeolites, namely, ZSM-5, Y, Mordenite, Ferrierite and Beta as well as silica and alumina. The key characters investigated were the Si/Al ratio and cation exchange. The results showed that the Mordenite zeolite exchanged with H+ exhibited the highest activity in dehydration of methanol. After finding the most active catalyst, the Mordenite zeolite was modified with Cu, Zn, Ni, Al, Zr, Mg and Na via wet-impregnation method to further improve its selectivity, and characterized by AAS, XRD, NH3-TPD, NH3-FT-IR and BET surface area techniques. It was found that these materials affected activity of HM zeolite by changing its acidity. Ultimately, amongst all catalysts studied, Al-modified Mordenite zeolite exhibited optimum activity, selectivity and stability for methanol dehydration to dimethyl ether.

Graphical abstractThe liquid-phase dehydration of methanol to dimethyl ether was investigated. The results showed that the Mordenite zeolite exchanged with H+ exhibited the highest activity in dehydration of methanol. Ultimately, amongst all catalysts studied, Al-modified Mordenite zeolite exhibited optimum activity, selectivity and stability for methanol dehydration to dimethyl ether. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
AAS, atomic adsorption spectroscopy; BET technique, Brunauer–Emmett–Teller technique; DME, dimethyl ether; HCs, hydrocarbons; HM, H-Mordenite; MeOH, methanol; NH3-TPD, ammonia temperature programmed desorption; XRD, X-ray diffractionDehydration; Methanol;
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Determining an optimum catalyst for liquid-phase dehydration of methanol to dimethyl ether
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 349, Issues 1–2, 31 October 2008, Pages 6–12
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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