Kinetics and structural evolution of sorbents at high temperatures

Technical Report · Sat Feb 01 00:00:00 EST 1992

OSTI ID:6828582

Fan, Liang-Shih; Advani, S; Raghunathan, K; Hsia, Chung-Wei; Dastidar, A G ^[1]

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1. Ohio State Univ., Columbus, OH (United States)

The focus of this project is on in-furnace (above the flame) sorbent injection technology using dry, calcium-based sorbents for high-sulfur coal flue gas desulfurization. The purpose of this project is to investigate the fundamentals of sorbent-gas interactions at high temperatures and short residence times. Sorbents generally used are CACO[sub 3] or Ca(OH)[sub 2]. Additives can be mixed with the sorbent to enhance sulfur removal, and they can be physically mixed with the sorbent or added during the hydration process for producing the hydroxide. The particle size is small, typically less than 50 microns. This period screening of the reaction parameters is carried out for limestone and hydrated lime particles in the temperature range 800 to 1100[degrees]C, for various SO[sub 2] concentrations. The limestone was doped with compounds of Na, K, Cr and Fe prior to calcination. This doping procedure causes solution of the dopant in the solvent CaO during calcination. The doped sorbents exhibit a lower surface area compared to undoped CaO, caused by solution reaction and/or sintering effect. In spite of addition of the dopants, the decrease in surface area is significant enough for the sulfation rate to decrease.

• Research Organization: Ohio Coal Development Office, Columbus, OH (United States); The Ohio State Univ., Columbus, OH (United States)
• Sponsoring Organization: STOFOH; Ohio State Government, Columbus, OH (United States)
• OSTI ID: 6828582
• Report Number(s): OCDO-93004575; ON: TI93004575; CNN: CDO/R-87-2C/B
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
CALCIUM OXIDES
CHEMICAL REACTIONS
SORPTIVE PROPERTIES
FLUE GAS
DESULFURIZATION
GASES
LIMESTONE
SULFUR DIOXIDE
AIR POLLUTION CONTROL
ADDITIVES
CALCINATION
CHROMIUM
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IRON
PARTICLE SIZE
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POTASSIUM
PROGRESS REPORT
SODIUM
SORBENT INJECTION PROCESSES
SULFATION
SURFACE AREA
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBONATE ROCKS
CHALCOGENIDES
CONTROL
DECOMPOSITION
DOCUMENT TYPES
ELEMENTS
FLUIDS
GASEOUS WASTES
METALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
PYROLYSIS
ROCKS
SEDIMENTARY ROCKS
SIZE
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
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010800* - Coal
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200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
540120 - Environment
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