Sulfur dioxide sorption reactivity of hydrated lime: effect of hydration method

Conference · Thu Jan 01 04:00:00 EST 1987 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:6136419

Moran, D L; Rostam-Abadi, M; Harvey, R D; Frost, R R; Sresty, G C

The Furnace Sorbent Injection (FSI) process is a relatively low capital cost technology for control of SO/sub 2/ emissions produced during combustion of high sulfur coal. A major factor in the total cost of the FSI concept is the effective utilization of the sorbent. In pilot plant tests performed by previous investigators, calcium utilization efficiencies (at Ca/S feed ratio of 2:1) ranged from 15 to 20% for limestone, 25 to 30% for dolomitic limestone, 20 to 30% for hydrated lime, and 35 to 40% for pressure-hydrated dolomitic lime. The low calcium utilizations observed in these any many other studies have motivated researchers to develop methods of producing more reactive calcium-based sorbents with the goal of reducing SO/sub 2/ removal costs. The objective of this investigation was to produce hydrated lime with high surface area. Three hydration methods were studied: (1) lime was hydrated with water or alcohol-water solutions, (2) lime was reacted with water at pressures and temperatures up to and exceeding supercritical conditions and the hydrated lime produced was ejected to atmospheric conditions, (3) lime was hydrated with steam. Sulfur dioxide sorption capacities were obtained by thermogravimetry and surface areas were determined by the BET (N/sub 2/) technique.

• Research Organization: Illinois State Geological Survey, Champaign (USA)
• OSTI ID: 6136419
• Report Number(s): CONF-8708275-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 32:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ADSORPTION
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
DATA
DISPERSIONS
EXPERIMENTAL DATA
FLUE GAS
GASEOUS WASTES
GRAVIMETRIC ANALYSIS
HYDRATES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
SORPTION
SORPTIVE PROPERTIES
STEAM
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUPERCRITICAL STATE
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
WASTES
WATER