Investigation of the Formation of Coherent Ash Residues during Fluidized Bed Gasification of Wheat Straw Lignin

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ID: 110862
2020
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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.
Reference Key
priscak2020energiesinvestigation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Juraj Priscak;Katharina Fürsatz;Matthias Kuba;Nils Skoglund;Florian Benedikt;Hermann Hofbauer;Priscak, Juraj;Fürsatz, Katharina;Kuba, Matthias;Skoglund, Nils;Benedikt, Florian;Hofbauer, Hermann;
Journal energies
Year 2020
DOI
10.3390/en13153935
URL
https://www.mdpi.com/1996-1073/13/15/3935/htm
Keywords
gasification combustion fluidized bed conversion wheat straw lignin ash formation gasification combustion fluidized bed conversion wheat straw lignin ash formation

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