Control of SOx emissions by in-furnace sorbent injection: carbonates vs hydrates

Technical Report · Tue Oct 01 04:00:00 EDT 1985

OSTI ID:6111899

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

The paper provides high-temperature isothermal data on SO/sub 2/ capture by calcium-based sorbents, obtained in a dispersed-phase reactor for limestones, dolomites, hydrated calcitic limes, and hydrated dolomitic limes 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: Utah Univ., Salt Lake City (USA). Dept. of Chemical Engineering
• OSTI ID: 6111899
• Report Number(s): PB-86-120219/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
COMBUSTION PRODUCTS
HYDRATES
INDUSTRIAL WASTES
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
SORBENT RECOVERY SYSTEMS
SORPTION
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
WASTES