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Evaluation of black liquor gasification intended for synthetic fuel or power production
RISE - Research Institutes of Sweden (2017-2019), Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.
RISE - Research Institutes of Sweden (2017-2019), Bioeconomy, ETC Energy Technology Center.ORCID iD: 0000-0001-9126-0155
RISE - Research Institutes of Sweden (2017-2019), Bioeconomy, ETC Energy Technology Center.
SINTEF Energy Research AS, Norway.
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2015 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 139, p. 216-225Article in journal (Refereed) Published
Abstract [en]

The performance of a high-temperature pressurized black liquor gasifier intended for fuel or power production was evaluated both by thermochemical equilibrium calculations and with experiments performed in a development plant with a maximum capacity corresponding to 3 MWth. The aim of this paper was to investigate how the energy efficiency and the performance of the gasifier change with desired use of the syngas and to provide an accurate process analysis which can be used in future work for process optimization and understanding. Experiments in the plant were performed for an oxygen equivalence ratio (λ) between 0.414-0.462 at two system pressures, 24.6 and 28.7 bar, respectively. The thermal load on the gasifier was 2.7 MWth during the experiments. The experimentally verified cold gas efficiency taking into account all gaseous species varied between 59.0-62.4%. However, if only CO and H2 (which are the effective molecules for synthetic fuel production) were taken into account; the cold gas efficiency decreased considerably to 53.7-55.4% due to the presence of CH4 in the gas. The results indicate that optimal performance for synthetic fuel production occurs at a higher λ compared to power production. There is also a potential to further improve the performance for an optimal operated commercial plant in the future since the theoretical results indicate that the cold gas efficiency could be as high as 68.8% (λ = 0.35) for fuel production and 81.7% (λ = 0.27) for power production. 

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 139, p. 216-225
Keywords [en]
Biofuel production, Biomass, Black liquor, Gasification, Power production, Energy efficiency, Fuels, Ionization of gases, Optimization, Synthetic fuels, Black liquor gasification, Cold gas efficiency, Optimal performance, Synthetic fuel productions, Thermochemical equilibrium
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-57375DOI: 10.1016/j.fuproc.2015.06.050Scopus ID: 2-s2.0-84946482061OAI: oai:DiVA.org:ri-57375DiVA, id: diva2:1622381
Note

Funding details: Energimyndigheten; Funding text 1: The authors of this work would like to thank the Swedish Energy Agency , the industrial consortium and the academic partners for funding this work through the Swedish Biomass Gasification Center (SFC) . The authors especially would like to thank Chemrec AB for letting us conduct experiments in the DP1 and publish the results from those experiments. Jonas Jönsson, Chemrec KB (now at LTU Green Fuels) and Dr. Erik Furusjö, Chemrec AB (now at LTU), are acknowledged for helping us with the planning and performance of the experiments. Dr. Roger Molinder, SP ETC. AB, is also acknowledged for the assistance with experimental work.

Available from: 2021-12-22 Created: 2021-12-22 Last updated: 2023-05-09Bibliographically approved

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Johansson, Ann-Christine

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