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Big problem, little answer: overcoming bed agglomeration and reactor slagging during the gasification of barley straw under continuous operation

Aladbrabalameer, Hassan; Taylor, Martin J.; Kauppinen, Juho; Soini, Teemu; Pikkarainen, Toni; Skoulou, Vasiliki


Hassan Aladbrabalameer

Juho Kauppinen

Teemu Soini

Toni Pikkarainen

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Dr Vicky Skoulou
Graduate Research Director (GRD) of School of Engineering ; Senior Lecturer (Assoc. Prof.) in Chemical Engineering-Bioenergy ; PI of the B3: Biomass Waste- BioenergH2- Biochars Challenge Group of PGRs and PDRAs



Defluidisation as a result of reactor bed agglomeration is a global challenge associated with the gasification of lignocellulosic biomass waste, specifically its high inorganic content. The use of conventional water leaching has been scrutanised for the removal of inorganic constituents from barley straw, a highly abundant waste feedstock with high ash content. The resulting pre-treated material was subsequently gasified at 750 oC and 850 oC under continuous flow, where it was found that bed agglomeration as a result of the ash melting induced mechanism can be eliminated, as visuallised by SEM and EDX studies. Here, the presence of eutetic mixtures result in the fusing of a SiO2 rich bed material that cause a sudden pressure drop in the reactor, resulting in a forced shutdown. Leached barley straw was found to effectively solve this issue and sustained gasification for a long period of time, as well as limiting inorganic based decoration on the surface of bed material grains after reaction. Additionally, leaching was found to enhance the production of low carbon fuel gases where an improved product yield of 31.9%vol and 37.3%vol for CO and CH4 was observed at 850 oC, as compared to untreated equivalent.


Aladbrabalameer, H., Taylor, M. J., Kauppinen, J., Soini, T., Pikkarainen, T., & Skoulou, V. (2020). Big problem, little answer: overcoming bed agglomeration and reactor slagging during the gasification of barley straw under continuous operation. Sustainable Energy & Fuels, 4(7), 3764-3772.

Journal Article Type Article
Acceptance Date May 25, 2020
Online Publication Date May 25, 2020
Publication Date Jul 1, 2020
Deposit Date May 25, 2020
Publicly Available Date Jun 2, 2020
Journal Sustainable Energy and Fuels
Electronic ISSN 2398-4902
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 4
Issue 7
Pages 3764-3772
Series ISSN 2398-4902
Public URL
Publisher URL!divAbstract


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This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.

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