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; Chemical Reactions; Sulfur Dioxide; 010800; 200202; 54 Environmental Sciences; Chemical And Physicochemical Properties; Diffusion; 01 Coal; Lignite; And Peat; Noxious Gas And Particulate Emissions; 540120; Sulfation; Hydrogen Sulfides; Marble; Limestone; Chemicals Monitoring And Transport; Activation Energy 400201; 20 Fossil-Fueled Power Plants; Waste Management; 37 Inorganic; Organic; Physical And Analytical Chemistry; Porosity; Particles; Calcite; Temperature Range 1000-4000 K; Greer; Iceland
• Online Access: https://digital.library.unt.edu/ark:/67531/metadc1272498/

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.