LAPSE:2023.24553
Published Article
LAPSE:2023.24553
Investigation of the Formation of Coherent Ash Residues during Fluidized Bed Gasification of Wheat Straw Lignin
March 28, 2023
Abstract
Thermal conversion of ash-rich fuels in fluidized bed systems is often associated with extensive operation problems caused by the high amount of reactive inorganics. This paper investigates the behavior of wheat straw lignin—a potential renewable fuel for dual fluidized bed gasification. The formation of coherent ash residues and its impact on the operation performance has been investigated and was supported by thermochemical equilibrium calculations in FactSage 7.3. The formation of those ash residues, and their subsequent accumulation on the surface of the fluidized bed, causes temperature and pressure fluctuations, which negatively influence the steady-state operation of the fluidized bed process. This paper presents a detailed characterization of the coherent ash residues, which consists mostly of silica and partially molten alkali silicates. Furthermore, the paper gives insights into the formation of these ash residues, dependent on the fuel pretreatment (pelletizing) of the wheat straw lignin, which increases their stability compared to the utilization of non-pelletized fuel.
Thermal conversion of ash-rich fuels in fluidized bed systems is often associated with extensive operation problems caused by the high amount of reactive inorganics. This paper investigates the behavior of wheat straw lignin—a potential renewable fuel for dual fluidized bed gasification. The formation of coherent ash residues and its impact on the operation performance has been investigated and was supported by thermochemical equilibrium calculations in FactSage 7.3. The formation of those ash residues, and their subsequent accumulation on the surface of the fluidized bed, causes temperature and pressure fluctuations, which negatively influence the steady-state operation of the fluidized bed process. This paper presents a detailed characterization of the coherent ash residues, which consists mostly of silica and partially molten alkali silicates. Furthermore, the paper gives insights into the formation of these ash residues, dependent on the fuel pretreatment (pelletizing) of the wheat straw lignin, which increases their stability compared to the utilization of non-pelletized fuel.
Record ID
Keywords
ash formation, combustion, fluidized bed conversion, gasification, wheat straw lignin
Subject
Suggested Citation
Priscak J, Fürsatz K, Kuba M, Skoglund N, Benedikt F, Hofbauer H. Investigation of the Formation of Coherent Ash Residues during Fluidized Bed Gasification of Wheat Straw Lignin. (2023). LAPSE:2023.24553
Author Affiliations
Priscak J: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria [ORCID]
Fürsatz K: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria [ORCID]
Kuba M: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
Skoglund N: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria; Thermochemical En [ORCID]
Benedikt F: Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
Hofbauer H: Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria [ORCID]
Fürsatz K: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria [ORCID]
Kuba M: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
Skoglund N: BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria; Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria; Thermochemical En [ORCID]
Benedikt F: Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
Hofbauer H: Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria [ORCID]
Journal Name
Energies
Volume
13
Issue
15
Article Number
E3935
Year
2020
Publication Date
2020-08-01
ISSN
1996-1073
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PII: en13153935, Publication Type: Journal Article
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https://doi.org/10.3390/en13153935
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