期刊
FUEL
卷 90, 期 7, 页码 2454-2460出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2011.02.031
关键词
Sulfur; Alkali metals; Biomass; Coal; Thermodynamic equilibrium calculations
资金
- National Basic Research Program of China [2011CB201500]
- National Natural Science Foundation of China [50706030]
- Project for Innovation Team of Liaoning Province of China [2007T141]
Biomass contains high amounts of volatile alkali metals and chlorine, which can cause deposition, corrosion and agglomeration during combustion. Meanwhile coal contains a certain amount of sulfur that produces serious environmental pollution following combustion. To investigate the effects of sulfur on the migration of alkali metals during biomass and coal co-combustion, thermodynamic equilibrium calculations were applied and experiments were performed in a laboratory scale reactor combining with a scanning electron microscope (SEM), X-ray powder diffraction (XRD) and other analytical approaches. The results indicate that inorganic sulfur FeS2 addition significantly enhanced the formation of potassium sulfate when the S/K molar ratio was less than 2. Meanwhile increasing FeS2 dosage reduced the formation of KCl(g) and KOH(g) and increased the release of HCl(g). In addition potassium sulfate can react with silica and aluminum to form potassium aluminosilicates and release HCl at the S/K molar ratio above 4. (c) 2011 Elsevier Ltd. All rights reserved.
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