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Methanol dehydration over commercially available zeolites: Effect of hydrophobicity

Paper ID Volume ID Publish Year Pages File Format Full-Text
54642 47017 2013 4 PDF Available
Title
Methanol dehydration over commercially available zeolites: Effect of hydrophobicity
Abstract

•H-Y and H-ZSM5 zeolites catalysts for methanol dehydration.•No correlation between productivity of the catalyst and concentration of acidic sites could be found.•Hydrophobicity of the catalyst (HI) was found to be a key parameter for DME production.

Commercially available H-Y (Faujasite) and H-ZSM5 zeolites with various SiO2/Al2O3 ratio (from 5 to 280) were used as acid catalyst for vapour phase methanol dehydration in mild condition (T < 250 ̊C; P < 5 bar). All tested catalysts were giving very high selectivity while conversion was highly dependent on both acid content and surface hydrophobicity expressed as Weitkamp hydrophobicity index (HI index). For H-Y and H-ZSM5 zeolites, a correlation was found between catalysts productivity expressed in kg of DME per hour per concentration of acid sites and HI index. Such results could rise to the design of more efficient catalyst for gas-phase DME synthesis from methanol.

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Keywords
Dimethylether; Methanol; Dehydration; Zeolites; Hydrophobicity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 215, 15 October 2013, Pages 239–242
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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