fulltext.study @t Gmail

Selective formation of propylene from methanol over high-silica nanosheets of MFI zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
40719 45863 2012 6 PDF Available
Title
Selective formation of propylene from methanol over high-silica nanosheets of MFI zeolite
Abstract

A high-silica nanosheet MFI zeolite was successfully assembled by low-cost raw materials and a special bifunctional organic surfactant. It showed high propylene selectivity (51.0%) and high propylene/ethylene (P/E) ratio (12.1), as well as long catalytic lifetime in methanol to propylene (MTP) reaction under the operating condition of T = 450 °C, P = 0.1 MPa (PMeOH = 20 kPa) and WHSV = 1.5 h−1. The excellent catalytic performance of MFI nanosheets could mainly be ascribed to its unique morphology and textural properties. The ultrathin nanosheets enormously shorten the diffusion path length and thus remarkably improve the molecular diffusion. As a result, the product molecules could easily escape from zeolite channels, and the secondary reactions like aromatization and hydrogen transfer are inhibited dramatically, leading to a high propylene selectivity and a low deactivation rate. Moreover, the considerably large specific surface area and high mesoporosity of the nanosheet MFI zeolite enable it to accommodate a lot more coke deposition, which also gives a good contribution to the notable improvement in the catalytic lifetime.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (214 K)Download as PowerPoint slideHighlights► High-silica nanosheet MFI zeolite was synthesized using cheap raw materials. ► Nanosheets of MFI zeolite were a high efficient catalyst for MTP. ► Enhanced propylene selectivity (51.0%) and P/E ratio (12.1) were obtained. ► Catalytic performance of MTP could be correlated to the morphology of MFI zeolite.

Keywords
Nanosheets; Methanol to propylene; Propylene selectivity; Catalytic lifetime; Diffusion
First Page Preview
Selective formation of propylene from methanol over high-silica nanosheets of MFI zeolite
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 - Volumes 445–446, 28 November 2012, Pages 215–220
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