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Reforming of tars and hydrocarbons from gasified biomass
Linnaeus University, Faculty of Technology, Department of Building and Energy Technology.ORCID iD: 0000-0002-4162-3680
2013 (English)In: Relesing Green Bioenergy for Human: Main Conference Volum 2, Dalia, PR China: BIT Congress , 2013Conference paper, (Refereed)
Abstract [en]

Tars are produced during gasification of biomass due to thermal decomposition of main constituent of the biomass, cellulose, hemicellulose and lignin. Since the tars will condense on colder surfaces, they cause problems by clogging of pipes and valves and depositions on heat transfer surfaces, for instance. One strategy is to remove the tars by condensing them in water or oil scrubbers, however since the tars might contain a significant part of the heating value in the producer gas the yield of the produced synthesis gas will decrease. To utilize the heat content in the tars they can be converted in situ to synthesis gas either by a catalytic process like steam reforming or autothermal reforming (ATR). The problem with catalytic reforming is that the catalysts used are sensitive towards the sulphur content, mainly H2S, in the producer gas. The deactivation of the reforming catalysts can be counteracted by increasing the reforming temperature, for instance  by the use of ATR. However, at elevated temperature, 1000-1100 oC, the thermal sintering of the catalyst will be accelerated instead. There is a need for development of new high temperature stable reforming catalysts. Another problem is the production of soot due to the high temperatures in the flame in the autothermal reformer unit. The formed sooth will cause problems by clogging packed bed of reforming catalyst and to cope with this it is probably necessary to use a monolithic catalyst.   However, by developing a way to homogenous combust the added oxygen, avoiding the peak temperatures in the flame, would suppress or eventually eliminate the soot formation.      

Place, publisher, year, edition, pages
Dalia, PR China: BIT Congress , 2013.
National Category
Chemical Engineering
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
URN: urn:nbn:se:lnu:diva-25477OAI: oai:DiVA.org:lnu-25477DiVA: diva2:618820
Conference
BIT´s 3rd Annual Congress of Bioenergy - Relesing Green Bioenergy for Human, 25-27 April, 2013, Nanjing
Projects
Swedish gasification centre
Available from: 2013-04-30 Created: 2013-04-30 Last updated: 2015-11-16Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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  • asciidoc
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