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Pyrolyzer–GC/MS system-based analysis of the effects of zeolite catalysts on the fast pyrolysis of Jatropha husk

Paper ID Volume ID Publish Year Pages File Format Full-Text
40532 45857 2013 8 PDF Available
Title
Pyrolyzer–GC/MS system-based analysis of the effects of zeolite catalysts on the fast pyrolysis of Jatropha husk
Abstract

Samples of Jatropha husk and cedar wood were catalytically pyrolyzed at 500 °C using the zeolites H-USY, H-Mordenite, H-Beta, and H-ZSM-5 as catalysts. The products of the pyrolysis processes were analyzed using a pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS) system. The fast pyrolysis of the Jatropha husk sample in the presence of the zeolites produced aromatic hydrocarbons in greater amounts than those produced during the pyrolysis of the cedar sample. Jatropha husk exhibited specific reactivity during the catalytic fast pyrolysis process. Among the catalysts evaluated, the zeolite H-USY exhibited the highest activity as evidenced by the changes in the pyrolysis products. It also exhibited the highest selectivity with respect to monocyclic aromatic hydrocarbons (MAHs). However, the use of this catalyst also resulted in an increase in the formation of the solid residue remaining after the pyrolysis process, which comprised coke and polycyclic aromatic hydrocarbons (PAHs) such as naphthalene and phenanthrene. In contrast, coke and PAHs were produced in very small amounts when the zeolite H-Beta was used. Furthermore, its selectivity with respect to MAHs was lower than those of the zeolites H-USY and H-ZSM-5 when used in the Jatropha husk/zeolite weight ratio of 1:1. When catalytic fast pyrolysis was carried out at a Jatropha husk/zeolite weight ratio of 1:5, selectivity with respect to the MAHs increased drastically. However, there was no concomitant increase in the production of coke and PAHs. The fact that coke and PAHs were produced in smaller amounts during the fast pyrolysis of Jatropha husk when the zeolite H-Beta was used as the catalyst makes it attractive for increasing the yield of MAHs during the pyrolysis of biomasses.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (217 K)Download as PowerPoint slideHighlights► Fast pyrolysis of Jatropha residues and cedar were preformed over several zeolites. ► The products of the pyrolysis processes were analyzed using pyrolyzer–GC/MS. ► Jatropha exhibited specific reactivity during the catalytic fast pyrolysis process. ► Coke and PAHs were produced in small amounts in the presence of H-Beta zeolite.

Keywords
Catalytic fast pyrolysis; Jatropha; Zeolite catalyst; Pyrolyzer–GC/MS; Bio-oil
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Pyrolyzer–GC/MS system-based analysis of the effects of zeolite catalysts on the fast pyrolysis of Jatropha husk
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 456, 10 April 2013, Pages 174–181
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