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Al-MCM-41 as methanol dehydration catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
42042 45908 2010 8 PDF Available
Title
Al-MCM-41 as methanol dehydration catalyst
Abstract

Al-MCM-41, [SiO2]/[Al2O3] = 30, mesoporous catalysts were synthesized using tetraethylorthosilicate (TEOS) as a source of silica and hexadecyltrimethylammonium bromide (CTAB) as a structure-directing agent (SDA) in the presence of tetrapropylammonium hydroxide (TPAOH) as a co-surfactant additive. The catalytic activities of the calcined samples were evaluated for the dehydration of methanol to dimethyl ether (DME) at 250–450 °C and a gas hourly space velocity (GHSV) of 14,000–80,000 mL g−1cat h−1. Al-MCM-41 samples synthesized in the presence of TPAOH showed higher activity than those synthesized in its absence. The improvement in catalytic activity correlates with the increase in acidity brought about by the enhanced condensation of aluminosilicate framework in the Al-MCM-41 structure. Al-MCM-41 catalysts were also combined with methanol synthesis catalysts to form bifunctional catalysts for the synthesis DME from CO2/H2 at temperature, 260 °C; pressure, 735 psi; GHSV, 2000 mL g−1cat h−1 in a fixed-bed reactor.

Graphical abstractAl-MCM-41, [SiO2]/[Al2O3] = 30, mesoporous catalysts were synthesized in the presence of tetrapropylammonium hydroxide (TPAOH) as a co-surfactant additive. The samples synthesized in the presence of TPAOH showed higher activity than those synthesized in its absence. Al-MCM-41 catalysts were also combined with methanol synthesis catalysts to form bifunctional catalysts for the synthesis of DME from CO2/H2.Figure optionsDownload full-size imageDownload high-quality image (99 K)Download as PowerPoint slide

Keywords
Al-MCM-41; Tetrapropylammonium hydroxide; Methanol dehydration catalyst; Dimethyl ether synthesis catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 381, Issues 1–2, 15 June 2010, Pages 183–190
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