Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 6, July 1--September 30, 1977

Technical Report · Sat Jan 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/5164190· OSTI ID:5164190

Yang, R T; Albanese, A S; Chen, J M; Farber, G; Kainz, F B; Pruzansky, J; Shen, M S; Smol, R

The Brookhaven Regeneration Process, which comprises reacting the sulfated limestone with fly ash from a FBC in a solid-solid contacting kiln-type reactor, has been shown to be more promising than other processes currently under development. Much improvement can be made by optimizing the operating conditions which are primarily: gas flow rate, degree of agitation (rpm), additives (both solids and gases, e.g. steam), types of carbon, etc. TGA kinetic studies also showed promising results. Cyclic studies, involving the kiln regenerator and a quartz fluidized-bed sulfator, are being conducted for both cyclic reactivity and attrition information. Various dicalcium silicates have been studied for their reactivities for sulfation. Most of the dicalcium silicates (formed in our laboratory and obtained from various sources) showed equal or higher sorption reactivities than lime, on a weight SO/sub 2/ per weight sorbent basis. More reactive calcium silicates are being sought, as well as the means of forming them. Highly encouraging results on the regenerabilities of the calcium silicates from their sulfated states are reported. For all the mono- and dicalcium silicates studied, the regeneration rates are about an order of magnitude higher than that of lime or limestone, in both straight thermal decomposition and regeneration with carbon. Other efforts involve studies on catalytic sulfation; calcination of limestones in atmospheres containing steam or CO/sub 2/, which increases the reactivities of the calcined stones significantly; kinetics in pressurized FBC; and the development of silicate-based synthetic sorbents.

• Research Organization: Brookhaven National Lab., Upton, N.Y. (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 5164190
• Report Number(s): BNL-50750
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
010800* -- Coal
Lignite
& Peat-- Waste Management
AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCINATION
CALCIUM COMPOUNDS
CALCIUM SILICATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL
COMBUSTION
DECOMPOSITION
DESULFURIZATION
ENERGY SOURCES
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDS
FLY ASH
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
KINETICS
LIMESTONE
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REGENERATION
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SILICATES
SILICON COMPOUNDS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
WASTE PRODUCT UTILIZATION
WASTES