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Vapor phase esterification using a CHA type of zeolite membrane

Paper ID Volume ID Publish Year Pages File Format Full-Text
53338 46963 2016 6 PDF Available
Title
Vapor phase esterification using a CHA type of zeolite membrane
Abstract

•CHA zeolite membrane showed a high water permeance of 2 × 10−7 mol/(m2 s Pa) at 130° C.•CHA membrane showed a selectivity as high as 2850 for H2O/EtOH at 130° C.•Conversion in vapor-phase esterification using a CHA membrane increased over the equilibrium.

Vapor phase esterification in a chabazite (CHA) zeolite membrane reactor was attempted not only to improve the productivity but also to avoid the use of liquid strong acid. CHA zeolite membrane was successfully prepared on a porous alumina tube by hydrothermal synthesis, showing a water permeance of ca. 2 × 10−7mol/(m2·s·Pa) and a selectivity of 2850 for H2O/EtOH at 130° C. As the alternate of the liquid acid, proton exchanged mordenite (H-MOR) was selected as a solid catalyst, where the esterification was found to be explained according to the Eley-Rideal mechanism. When vapor-phase esterification was carried out in a double tube type membrane reactor, some equilibrium shift was observed; this was achieved by continuous and selective water removal along the reactor length. Further, it was demonstrated that a simulation model for the membrane reactor, established on the assumption that the ideal conditions could be applied, described the reactor performance well.

Graphical abstractThe difference between AcOEt and H2O becomes large with W/F; this is because the water in the reaction side is selectively removed.Figure optionsDownload full-size imageDownload high-quality image (117 K)Download as PowerPoint slide

Keywords
Esterification; Zeolite membrane reactor; Chabazite; Acetic acid; Water vapor permeation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 268, 15 June 2016, Pages 79–84
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