fulltext.study @t Gmail

C2–C4 light olefins from bioethanol catalyzed by Ce-modified nanocrystalline HZSM-5 zeolite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46723 46446 2011 9 PDF Available
Title
C2–C4 light olefins from bioethanol catalyzed by Ce-modified nanocrystalline HZSM-5 zeolite catalysts
Abstract

Conversion of bioethanol into bulk chemicals besides ethylene is a promising process in which the stability of catalyst and the selectivity of products are important. In this study, a series of Ce-modified nanocrystalline HZSM-5 catalysts were prepared and their catalytic performance in the conversion of bioethanol into C2–C4 light olefins was investigated in a fixed-bed reactor at 400 °C under atmospheric pressure. The results show that the stability of catalyst and the distribution of products depend strongly on the content of cerium and the calcination temperature; both cerium content and calcination temperature affect not only the acid properties of the tested catalyst samples but also the composition of cerium species (Ce3+/Ce4+) as revealed by XPS. Among the tested catalyst samples, the catalyst with 5 wt% cerium loading and 520 °C calcination temperature exhibits the best stability and selectivity to C3–C4 light olefins.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ce modified nanocrystalline HZSM-5 was used to convert bioethanol into C2-C4 light olefins. ► Ce modification leads to the increase in the ratio of Brőnsted acid sites to Lewis acid sites. ► Both Ce3+ and Ce4+ species present over the surface of catalyst samples after Ce modification. ► The ratio of Ce3+ to Ce4+ can be adjusted by Ce content and calcination temperature. ► Ce modification improves the stability and product distribution.

Keywords
Bioethanol; Transformation; Light olefins; Ce-modified; Nanocrystalline HZSM-5
First Page Preview
C2–C4 light olefins from bioethanol catalyzed by Ce-modified nanocrystalline HZSM-5 zeolite catalysts
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 B: Environmental - Volume 107, Issues 1–2, 31 August 2011, Pages 68–76
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