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...

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Bibliographic Details
Main Author: Sotirchos, S.V.
Language:unknown
Published: 2008
Subjects:
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
01 COAL
LIGNITE
AND PEAT
HYDROGEN SULFIDES
CHEMICAL REACTIONS
LIMESTONE
SULFATION
SULFUR DIOXIDE
ACTIVATION ENERGY
CALCITE
DIFFUSION
MARBLE
PARTICLES
POROSITY
TEMPERATURE RANGE 1000-4000 K
THERMAL GRAVIMETRIC ANALYSIS
CARBONATE MINERALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL ANALYSIS
ENERGY
GRAVIMETRIC ANALYSIS
HYDROGEN COMPOUNDS
METAMORPHIC ROCKS
MINERALS
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
ROCKS
SEDIMENTARY ROCKS
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
TEMPERATURE RANGE
THERMAL ANALYSIS
Greer
Iceland
Online Access:http://www.osti.gov/servlets/purl/7001087
https://www.osti.gov/biblio/7001087
Description
Summary: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.

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