An investigation of CaO sulfation mechanism in boiler sorbent injection

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · A.I.Ch.E. Journal (American Institute of Chemical Engineers); (USA)

OSTI ID:7174241

Stouffer, M R; Yoon, H ^[1]

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1. Consolidation Cool Company Research and Development Library, PA (US)

This paper reports a laboratory differential reactor study conducted at temperatures of 975-1,275 K to investigate CaO sulfation mechanisms with calcine (CaO) samples derived from pulverized limestones and dolomites, and hydrated limes. The limestones had 8-115 {mu}m mean particle sizes, a range applicable for boiler sorbent injection for SO{sub 2} control. Under conditions applicable for boiler sorbent injection, the sorbent performance, in terms of initial reaction rate and saturation utilization, was limited by the SO{sub 2} pore diffusion rate and by premature pore mouth plugging by CaSO{sub 4} product and, thus, depended on CaO particle size and pore size. Hydrated lime and Na{sub 2}CO{sub 3}-promoted limestones showed performance superior to that of limestones, because they produced calcines with larger pores. Intrinsic reaction rate was observed at temperatures below 1,100 K.

• OSTI ID: 7174241
• Journal Information: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (USA), Journal Name: A.I.Ch.E. Journal (American Institute of Chemical Engineers); (USA) Vol. 35:8; ISSN AICEA; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200200 -- Fossil-Fueled Power Plants-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BOILERS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFATES
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CONTROL
DOLOMITE
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POLLUTION CONTROL
PULVERIZED FUELS
ROCKS
SEDIMENTARY ROCKS
SIZE
SODIUM CARBONATES
SODIUM COMPOUNDS
SORBENT INJECTION PROCESSES
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES