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Effect of Fe–olivine on the tar content during biomass gasification in a dual fluidized bed

Paper ID Volume ID Publish Year Pages File Format Full-Text
46193 46433 2012 9 PDF Available
Title
Effect of Fe–olivine on the tar content during biomass gasification in a dual fluidized bed
Abstract

The Fe/olivine catalyst effectiveness regarding tar primary reduction during biomass gasification in dual fluidized beds has been investigated. The use of Fe/olivine instead olivine leads to an important decrease in the amount of produced tar, which was reduced by up to 65% at 850 °C, naphthalene being the most stable molecule. It has been found that Fe/olivine materials have a double effect on tar destruction. On the one hand, they act as a catalyst for tar and hydrocarbon reforming. On the other hand, they can act as an oxygen carrier that transfers oxygen from the combustor to the gasifier, and part of the oxygen is used to burn volatile compounds. The catalyst was fairly stable because the result was confirmed during 48 h of continuous operation. The Fe/olivine material characterization (X-ray diffraction, Mössbauer spectroscopy, temperature programmed reduction and oxidation, etc.) revealed that the catalyst structure was maintained despite the large number of oxidizing–reducing cycles. The carbon that formed on the catalyst surface was low and easily oxidized in the combustion zone. Therefore, the inexpensive and non-toxic Fe/olivine catalyst is a material suitable for use as primary catalyst in a fluidized bed gasification of biomass.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Fe/olivine has suitable properties for tar primary reduction in biomass gasification. ► Fe/olivine is an inexpensive and non-toxic material. ► Important improvements in comparison to olivine and silica sand were found. ► The dual effect as catalyst and oxygen carrier produces an increased tar destruction. ► Catalyst has a good aging in the operating conditions.

Keywords
Fe/olivine catalyst; Biomass gasification; Tar removal; Dual fluidized bed
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Effect of Fe–olivine on the tar content during biomass gasification in a dual fluidized bed
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 121–122, 13 June 2012, Pages 214–222
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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