Control of SO/subx/ emissions by in-furnace sorbent injection: Carbonates vs. hydrates

Journal Article · Thu May 01 04:00:00 EDT 1986 · Environ. Prof.; (United States)

OSTI ID:5324635

Newton, G H; Harrison, D J; Silcox, G D; Pershing, D W

High temperature, isothermal data on SO/sub 2/ capture by calcium based sorbents were obtained in a dispersed-phase reactor for limestones, dolomites, hydrated calcitic limes, and hydrated dolomitic lines as a function of Ca/S molar ratio, temperature, and SO/sub 2/ partial pressure. The experimental results indicate that SO/sub 2/ capture is approximately linearly dependent on Ca/S molar ratio and relatively insensitive to SO/sub 2/ partial pressure above 2000 ppm. SO/sub 2/ capture is a strong function of general sorbent class; dolomitic sorbents are better than calcitic materials on an equivalent calcium basis and hydrated materials are more reactive than carbonates. Computer model predictions based on a grain formulation, available fundamental rate data, and measured surface areas accurately predict limestone performance; however, predicted capture for the hydrated sorbents is significantly below that measured experimentally. The measured capture results do, however, generally correlate with the BET surface areas measured when the sorbents were calcined in a muffle furnace at 980 K for 20 minutes with an inert environment.

• Research Organization: Dept. of Chemical Engineering, Univ. of Utah, Salt Lake City, UT 84112
• OSTI ID: 5324635
• Journal Information: Environ. Prof.; (United States), Journal Name: Environ. Prof.; (United States) Vol. 5:2; ISSN EPROD
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CALCINATION
CALCITE
CALCIUM
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONTROL
DATA ANALYSIS
DECOMPOSITION
DOLOMITE
ELEMENTS
EMISSION
FURNACES
HIGH TEMPERATURE
HYDRATES
ISOTHERMAL PROCESSES
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
METALS
MINERALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
POLLUTION CONTROL
PYROLYSIS
QUANTITY RATIO
ROCKS
SEDIMENTARY ROCKS
SIMULATION
SORPTION
SORPTIVE PROPERTIES
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE