Carbon slurries for sulfur dioxide abatement
An electrochemical carbon slurry process (U.S. Pat. 3,824,163) has been developed, which consists basically of adsorption of sulfur dioxide by a suspended, moving adsorbent, such as an aqueous carbon slurry, followed by electrochemical oxidation of sulfur dioxide into sulfuric acid. The process offers flexibility in cell design, high adsorption efficiencies (90-100Vertical Bar3<), ease of handling, and low parasitic power requirements (e.g., 2Vertical Bar3< for a 500 Mw plant vs. the 1.2-7Vertical Bar3< reported for other FGD processes). Its water usage is very low compared with, e.g., that of the limestone process. The by-products, sulfuric acid and hydrogen, are marketable. The over-all concept, the slurry electrodes, and the design of the major subsystems (scrubber, electrochemical cell, and settling tank and concentrator) are discussed; estimates of scrubber size and load, electrochemical cell parameters and mass flow rates are given for a 500 Mw powerplant, which uses 3Vertical Bar3< sulfur coal, assuming 35Vertical Bar3< efficiency, 12,000 Btu/lb of coal, and 90Vertical Bar3< recovery.
- Research Organization:
- Varian Assoc. Inc.
- OSTI ID:
- 6850996
- Journal Information:
- AIChE Symp. Ser.; (United States), Journal Name: AIChE Symp. Ser.; (United States) Vol. 75:188; ISSN ACSSC
- Country of Publication:
- United States
- Language:
- English
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ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CONTROL
DESIGN
DESULFURIZATION
DISPERSIONS
ELECTROCHEMISTRY
ELEMENTS
EQUIPMENT
EVALUATION
FLOW RATE
FLUE GAS
GASEOUS WASTES
HYDROGEN
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MIXTURES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
REMOVAL
SCRUBBERS
SLURRIES
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
SUSPENSIONS
TECHNOLOGY UTILIZATION
WASTES