Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes
During this reporting period, bench- and pilot-scale experiments have been concluded to measure mass transfer and kinetic rates at simulated duct injection conditions. Section 2 describes the tank reactor test results. Present work is focused on running the slurry absorption model for solution compositions which are representative of the tests performed in the stirred tank reactor. The slurry absorption model has been run successfully to simulate most of the clear solution experiments. Section 3 presents the results of a special study investigating the use of Epsom Salt (magnesium sulfate heptahydrate, MgSO{sub 4}{center dot}7H{sub 2}O) as an additive for in-duct dry injection to reduce the amount of water needed for humidification. Industrial grade Epsom Salt was injected into a 50-cfm pilot plant at {approximately}3.4 lb/h. Section 4 summarizes the status of slaking modification tests. The present study focuses on an evaluation of techniques for the production of a fine particulate Ca(OH){sub 2} during slaking. Section 5 reports on differential reactor (Task 4) tests. The reactor has been modified to allow contact of solids containing varying amounts of surface water with humidified flue gas for 10--120 s. Preliminary gas and wet solids experiments have been performed using lime/flyash mixtures containing 5--40 percent initial free moisture. 3 refs., 14 figs., 10 tabs.
- Research Organization:
- Acurex Corp., Research Triangle Park, NC (USA). Environmental Systems Div.; Texas Univ., Austin, TX (USA). Dept. of Chemical Engineering
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC22-88PC88874
- OSTI ID:
- 7178227
- Report Number(s):
- DOE/PC/88874-T8; ON: DE90011035
- Country of Publication:
- United States
- Language:
- English
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Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes
Theoretical approach for enhanced mass transfer effects in duct flue gas desulfurization processes
Related Subjects
01 COAL, LIGNITE, AND PEAT
FLUE GAS
DESULFURIZATION
SULFUR DIOXIDE
SORPTION
ADDITIVES
CALCIUM HYDROXIDES
CHEMICAL REACTORS
FOSSIL-FUEL POWER PLANTS
MAGNESIUM SULFATES
MASS TRANSFER
MATHEMATICAL MODELS
PROGRESS REPORT
REACTIVITY
SLURRIES
SORBENT INJECTION PROCESSES
TEMPERATURE EFFECTS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
DOCUMENT TYPES
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
MAGNESIUM COMPOUNDS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
SUSPENSIONS
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management