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Nickel-substituted bariumhexaaluminates as novel catalysts in steam reforming of tars
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Bioenergy technology)
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Bioenergy technology)
University of Bologna, Italy.
University of Bologna, Italy.
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2015 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 140, 1-11 p.Article in journal (Refereed) Published
Abstract [en]

This work investigates the performance of Ba–Ni-hexaaluminate, BaNixAl12 − xO19, as a new catalyst in thesteam-reforming of tars. Substituted hexaaluminates are synthesized and characterized. Steam reforming testsare carried out with both a model-substance (1-methylnaphthalene) and a slip-stream from a circulatingfluidized bed gasifier. The water–gas-shift activity is studied in a lab-scale set-up. Barium–nickel substitutedhexaaluminates show a high catalytic activity for tar cracking, and also shows activity for water–gas-shift.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 140, 1-11 p.
Keyword [en]
Catalysis, Gasification, Steam-reforming, Water–gas-shift, Tar-cracking, BaNi-hexaaluminates
National Category
Energy Engineering Bioenergy
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
URN: urn:nbn:se:lnu:diva-46183DOI: 10.1016/j.fuproc.2015.07.024ISI: 000363354000001Scopus ID: 2-s2.0-84941562585OAI: oai:DiVA.org:lnu-46183DiVA: diva2:852612
Available from: 2015-09-09 Created: 2015-09-09 Last updated: 2016-09-23Bibliographically approved
In thesis
1. Study of the activity of catalysts for the production of high quality biomass gasification gas: with emphasis on Ni-substituted Ba-hexaaluminates
Open this publication in new window or tab >>Study of the activity of catalysts for the production of high quality biomass gasification gas: with emphasis on Ni-substituted Ba-hexaaluminates
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The fossil hydrocarbons are not inexhaustible, and their use is not without impact in our need of energy, fuels and hydrocarbons as building blocks for organic materials. The quest for renewable, environmentally more friendly technologies are in need and woody biomass is a promising candidate, well provided in the boreal parts of the world. To convert the constituents of wood into valuable gaseous products, suitable for the end use required, we need a reliable gasification technology. But to become an industrial application on full scale there are still a few issues to take into account since the presence of contaminants in the process gas will pose several issues, both technical and operational, for instance by corrosion, fouling and catalyst deactivation. Furthermore the downstream applications may have very stringent needs for syngas cleanliness depending on its use. Therefore, the levels of contaminants must be decreased by gas cleanup to fulfil the requirements of the downstream applications.

One of the most prominent problems in biomass gasification is the formation of tars – an organic byproduct in the degradation of larger hydrocarbons. So, tar degrading catalysts are needed in order to avoid tar related operational problems such as fouling but also reduced conversion efficiency. Deactivation of catalysts is generally inevitable, but the process may be slowed or even prevented. Catalysts are often very sensitive to poisonous compounds in the process gas, but also to the harsh conditions in the gasifier, risking problems as coke formation and attrition. Alongside with having to be resistant to any physical and chemical damage, the catalyst also needs to have high selectivity and conversion rate, which would result in a more or less tar-free gas. Commercial tar reforming catalysts of today often contain nickel as the active element, but also often display a moderate to rapid deactivation due to the causes mentioned.

Place, publisher, year, edition, pages
Linnaeus University, 2016. 72 p.
Series
Faculty of Technology, Report, 45
Keyword
bioenergy, catalysis, tars, steam reforming, gasification, hexaaluminate, bioenergi, katalys, tjäror, ångreformering, förgasning, hexaaluminat
National Category
Bioenergy Other Chemical Engineering
Research subject
Technology (byts ev till Engineering), Bioenergy Technology; Natural Science, Chemistry
Identifiers
urn:nbn:se:lnu:diva-55702 (URN)978-91-88357-35-9 (ISBN)
Presentation
2016-09-06, Sal N1017, hus N, Växjö, Växjö, 09:15 (English)
Opponent
Supervisors
Available from: 2016-08-25 Created: 2016-08-22 Last updated: 2017-09-01Bibliographically approved

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