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Catalytic steam gasification of pinewood and eucalyptus sawdust using reactive flash volatilization

Paper ID Volume ID Publish Year Pages File Format Full-Text
45113 46396 2016 18 PDF Available
Title
Catalytic steam gasification of pinewood and eucalyptus sawdust using reactive flash volatilization
Abstract

•Lignocellulosic biomass gasified into tar free syngas for the first time over a single catalyst bed.•Gasification required lower O/C and steam/C feed ratios compared to cellulose.•Gasification efficiency was in order of Eucalyptus > Pinewood > Microcrystalline Cellulose, which followed the trend in ash content.

Catalytic steam gasification of cellulose using reactive flash volatilisation (RFV) has been proven as a promising approach for syngas production. However, using cellulose as feedstock is economically unfavourable. This paper investigates the production of syngas using RFV of pinewood and eucalyptus sawdust as feedstock. Experiments were conducted to evaluate the effects of catalyst promoters, carbon to oxygen ratio, carbon to steam ratio, feedstock type and ash contents on product yields (i.e. gas, tar and char) and product gas composition. High gasification efficiency and low char selectivity were observed in the pinewood RFV with Re-Ni and Rh-Ni catalysts, which can be explained by the catalysts high active metal substrate dispersion. Additionally, in comparison to cellulose, higher gasification efficiencies were also observed in the pinewood and eucalyptus RFV. This can be attributed to the effects resulted from higher amorphous structure of lignocellulosic biomass compared to microcrystalline cellulose, and the catalytic effects of alkali and alkaline earth metals (AAEM species) found in the lignocellulosic biomass ash. The catalytic effects o f AAEM species further reduced the coke deposition on the Ni catalysts, making the effect of noble metal promoter on the Ni catalysts less significant. The effects on product yields and gas composition from promoters, carbon to oxygen ratio and carbon to steam ratio were less pronounced.

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Keywords
Catalytic steam gasification; Reactive flash volatilisation; Pinewood; Eucalyptus; Nickel catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 187, 15 June 2016, Pages 310–327
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