fulltext.study @t Gmail

Upgrading of bio-oil derived from biomass constituents over hierarchical unilamellar mesoporous MFI nanosheets

Paper ID Volume ID Publish Year Pages File Format Full-Text
54464 47010 2014 8 PDF Available
Title
Upgrading of bio-oil derived from biomass constituents over hierarchical unilamellar mesoporous MFI nanosheets
Abstract

•Unilamellar mesoporous MFI nanosheets were used for the first time to the catalytic pyrolysis of biomass constituents.•The catalytic activity of unilamellar mesoporous MFI nanosheets was better than that of mesoporous Al-SBA-15.•Unilamellar mesoporous MFI nanosheets produced the high value-added species like furans, phenolics and aromatics.

Unilamellar mesoporous MFI nanosheets (UMNs) were, for the first time, applied to the catalytic pyrolysis of the constituents of lignocellulosic biomass: cellulose, hemicellulose and lignin. A representative mesoporous catalyst, Al-SBA-15, was also applied to the same process for the purpose of comparison. The catalysts were characterized by N2 adsorption–desorption, X-ray diffraction, temperature programmed desorption of ammonia, and transmission electron microscopy. The synthesized UMN catalyst was composed of a random assembly of zeolite nanosheets with a thickness of 2.5 nm. UMN was shown to have strong Brønsted acid sites, whereas Al-SBA-15 had weak acid sites. Catalytic pyrolysis experiments were carried out using Py-GC/MS. The product distribution was analyzed in order to evaluate catalytic activity. Acidity had a considerable influence on catalytic activity; UMN, with a higher acidity than Al-SBA-15, exhibited higher activities for cracking and deoxygenation, producing bio-oil with a lower oxygen content and with a better overall quality. Levoglucosan, which was the main product of the non-catalytic pyrolysis of cellulose, was converted to aromatics and furans on the acid sites of the catalysts. Ketones, alcohols and cyclo-compounds, the main products of the non-catalytic pyrolysis of xylan, were also converted to aromatics and furans by catalytic upgrading. The main products of the non-catalytic pyrolysis of lignin were phenolics, which were converted to aromatics and lighter phenolics (alkyl phenolics and methoxy phenolics) in the presence of catalysts. Increasing the catalyst dose improved the quality of the product oil even further.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (128 K)Download as PowerPoint slide

Keywords
Cellulose; Hemicellulose; Lignin; Pyrolysis; Unilamellar mesoporous MFI nanosheets
First Page Preview
Upgrading of bio-oil derived from biomass constituents over hierarchical unilamellar mesoporous MFI nanosheets
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 232, 1 September 2014, Pages 119–126
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