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Influence of process parameters on the performance of an oxygen blown entrained flow biomass gasifier
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
Energy Technology Centre, Piteå, SP Energy Technology Center AB.
SP Energy Technology Center AB.
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2015 (English)In: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 153, p. 510-519Article in journal (Refereed) Published
Abstract [en]

Pressurized, O2 blown, entrained flow gasification of pulverized forest residues followed by methanol production is an interesting option for synthetic fuels that has been particularly investigated in the Nordic countries. In order to optimize gasification plant efficiency, it is important to understand the influence of different operating conditions. In this work, a pressurized O2 blown and entrained flow biomass gasification pilot plant was used to study the effect of four important process variables; (i) the O2 stoichiometric ratio (λ), (ii) the load of the gasifier, (iii) the gasifier pressure, and (iv) the fuel particle size. Commercially available stem wood fuels were used and the process was characterized with respect to the resulting process temperature, the syngas yield, the fuel conversion and the gasification process efficiency. It was found that CH4 constituted a significant fraction of the syngas heating value at process temperatures below 1400 °C. If the syngas is intended for catalytic upgrading to a synthetic motor fuel where CO and H2 are the only important syngas species, the process should be optimized aiming for a process temperature slightly above 1400 °C in order to reduce the energetic losses to CH4 and C6H6. This resulted in a cold gas efficiency (based only on CO and H2) of 70%. The H2/CO ratio was experimentally determined within the range 0.45–0.61. Thus, the syngas requires shifting in order to increase the syngas composition of H2 prior to fuel synthesis.

Place, publisher, year, edition, pages
2015. Vol. 153, p. 510-519
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-7056DOI: 10.1016/j.fuel.2015.03.041Local ID: 55efec05-aa65-47c5-a0e4-b0c458dd2fe3OAI: oai:DiVA.org:ltu-7056DiVA: diva2:979943
Note
Validerad; 2015; Nivå 2; 20150331 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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  • apa
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