Comparative study of the reactions of metal oxides with H{sub 2}S and SO{sub 2}
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.
- Research Organization:
- Rochester Univ., NY (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-90PC90301
- OSTI ID:
- 10120767
- Report Number(s):
- DOE/PC/90301-93/C0140; CONF-921034-28; ON: DE93005904
- Resource Relation:
- Conference: 9. annual coal-fueled heat engines, advanced pressurized fluidized-bed combustion (PFBC), and gas stream cleanup systems contractors review meeting,Morgantown, WV (United States),27-29 Oct 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
LIMESTONE
SULFATION
SULFUR DIOXIDE
CHEMICAL REACTIONS
HYDROGEN SULFIDES
MARBLE
CALCITE
THERMAL GRAVIMETRIC ANALYSIS
PARTICLES
TEMPERATURE RANGE 1000-4000 K
POROSITY
DIFFUSION
ACTIVATION ENERGY
400201
200202
540120
010800
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
NOXIOUS GAS AND PARTICULATE EMISSIONS
CHEMICALS MONITORING AND TRANSPORT
WASTE MANAGEMENT