Comparative study of the reactions of metal oxides with H[sub 2]S and SO[sub 2]

• Main Author: Sotirchos, S.V.
• Other Authors: United States. Department of Energy.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Rochester Univ., NY (United States). Dept. of Chemical Engineering 1992
• Subjects: Thermal Gravimetric Analysis; Thermal Analysis 400201* > Chemical & Physicochemical Properties; Chemical Reactions; Sulfur Dioxide; 540120 > Environment; Atmospheric > Chemicals Monitoring & Transport > (1990-); Sulfides; Oxides; 54 Environmental Sciences; Minerals; 200202 > Fossil-Fueled Power Plants > Waste Management > Noxious Gas & Particulate Emissions; Gravimetric Analysis; Diffusion; 01 Coal; Lignite; And Peat; Rocks; Oxygen Compounds; Sulfation; Carbonate Minerals; Hydrogen Sulfides; Marble; Limestone; Sedimentary Rocks; Energy; Metamorphic Rocks; Chalcogenides; Sulfur Compounds; 20 Fossil-Fueled Power Plants; Temperature Range; Chemical Analysis; Activation Energy; Carbonate Rocks; Sulfur Oxides; 010800 > Coal; & Peat > Waste Management; 37 Inorganic; Organic; Physical And Analytical Chemistry; Quantitative Chemical Analysis; Hydrogen Compounds; Porosity; Particles; Calcite; Temperature Range 1000-4000 K; Greer; Iceland
• Online Access: https://digital.library.unt.edu/ark:/67531/metadc1185475/

Primary objective was to investigate the effects of pore structure on capacity of porous metal oxides for removal of SO[sub 2] from power plant fuel gas and H[sub 2]S from hot coal gas. During this period, a comparative study was carried out on the direct reaction with H[sub 2]S and SO[sub 2] of the three limestones used as CaO precursors: Greer limestone, Georgia marble, and Iceland spar calcite. Sulfation was carried out at 750 and 850 C in a thermogravimetric analysis system under simulated high pressure (enough CO[sub 2] to prevent decomposition of CaCO[sub 3]). Results are presented as conversion vs time graphs. Mercury penetration and gas adsorption were used to analyze the structure. Activation energies and effective diffusivities were determined. A variable diffusivity shrinking-core model was used to analyze the data. In the future, this limestone study will be completed, and a study on supported CuO sorbent will be started.