fulltext.study @t Gmail

Single-step synthesis of dimethyl ether from syngas on Al2O3-modified CuO–ZnO–Al2O3/ferrierite catalysts: Effects of Al2O3 content

Paper ID Volume ID Publish Year Pages File Format Full-Text
54142 46998 2014 8 PDF Available
Title
Single-step synthesis of dimethyl ether from syngas on Al2O3-modified CuO–ZnO–Al2O3/ferrierite catalysts: Effects of Al2O3 content
Abstract

•Single step synthesis of dimethyl ether on CuO–ZnO deposited on Al2O3-modified H-ferrierite was investigated.•The Al2O3 modification of H-ferrierite enhanced the activity at the composition of 2.5–5 wt%.•The role of Al2O3 on H-ferrierite is found to reduce strong acidic sites.•Both copper surface area and amount of acidic sites are correlated with an intrinsic activity.

Single step synthesis of dimethyl ether (DME) from syngas on the bifunctional catalysts of CuO–ZnO–Al2O3 deposited on Al2O3-modified H-ferrierite was investigated to elucidate effects of Al2O3 modification of H-ferrierite in terms of CO conversion and DME yield. The enhanced catalytic activity was observed on the bifunctional catalysts at an optimum content of Al2O3 on H-ferrierite around 2.5–5 wt%. It is attributed to a higher dispersion of Al2O3 on H-ferrierite with an enhanced interaction of copper particles with Al2O3 modified H-ferrierite with a lower aggregation property by adjusting acidic sites and by increasing the dispersion of copper particles. The main role of Al2O3 on H-ferrierite is found to reduce strong acidic sites by depositing on the sites selectively, which resulted in showing a lower formation of byproducts. Both of copper surface area and amount of acidic sites are well correlated with an intrinsic activity (turn-over frequency; TOF), which revealed a structure-insensitive reaction character of a single-step synthesis of DME. The measurements of the dispersion of Al2O3 and copper particles with the number of acidic sites concomitantly were employed to verify the effects of Al2O3 modification of H-ferrierite though X-ray photoelectron spectroscopy, temperature-programmed methods and surface morphology characterizations.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (137 K)Download as PowerPoint slide

Keywords
Single-step synthesis of DME; Bifunctional catalyst; CuO–ZnO–Al2O3; Al2O3-modified H-ferrierite zeolite; Syngas; Intrinsic activity
First Page Preview
Single-step synthesis of dimethyl ether from syngas on Al2O3-modified CuO–ZnO–Al2O3/ferrierite catalysts: Effects of Al2O3 content
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: Catalysis Today - Volume 228, 1 June 2014, Pages 175–182
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