Calcium silicate cement sorbent for H/sub 2/S removal and improved gasification processes. Annual progress report, October 1, 1981-September 30, 1982
Commercial calcium silicate bearing Portland cement type III (PC III), in the form of agglomerated cement sorbent (ACS) pellets, is being investigated for in-situ desulfurization of fuel gases and for improved coal gasification. The preparation procedure and conditions for pelletizing agglomerated cement sorbent (ACS) by a low energy, low cost agglomeration technique have been modified using a two-stage pelletization procedure, which yields ACS pellets of greater mechanical strength. A 40 mm ID bench scale fluidized bed gasifier (FBG) was used to determine sulfur removal efficiency of ACS pellets as well as their attrition resistance, using a simulated gas mixture. These tests show that 90% or more of the sulfur removal from the gas is achieved until 35% of the ACS pellet is sulfidated and that it has excellent attrition resistance (less than 0.1% wt loss) during cyclic tests excluding the first conditioning cycle. The gasification of coal by partial oxidation with air to low Btu gas was conducted in a 1-inch bench scale FBG unit by our collaborator, the Foster Wheeler Corporation (FWC). At temperatures between 800/sup 0/C and 950/sup 0/C the efficiency of coal gasification is improved by as much as 40% when ACS pellets are used compared to the use of Greer limestone. At the same time the sulfur removal efficiency is increased from 50 to 65% with Greer limestone to over 95% with the ACS pellets. The test on sulfur fixation characteristics of the sorbent in the 1-inch FBG unit using a simulated gas also shows that the ACS pellet is much more reactive toward H/sub 2/S than Greer limestone. The ability of ACS pellets to simultaneously desulfurize and improve the gasification efficiency of coal in FBG justifies further investigation.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6407146
- Report Number(s):
- DOE/CH/00016-1367; ON: DE83009577
- Country of Publication:
- United States
- Language:
- English
Similar Records
Calcium silicate cements for desulfurization of combustion gases. Semiannual progress report, October 1, 1980-March 31, 1981
Calcium silicate cements for desulfurization of combustion gases. Final report, October 1, 1980-March 31, 1982
Related Subjects
ADSORBENTS
CHEMICAL PREPARATION
PELLETIZING
PERFORMANCE TESTING
CALCIUM SILICATES
CATALYTIC EFFECTS
SORPTIVE PROPERTIES
COAL GASIFICATION
CATALYSTS
FUEL GAS
DESULFURIZATION
CARBON DIOXIDE
CEMENTS
CHARS
CHEMICAL REACTIONS
EXPERIMENTAL DATA
HYDROGEN SULFIDES
PURIFICATION
REGENERATION
REMOVAL
SULFIDATION
THERMAL GRAVIMETRIC ANALYSIS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
FABRICATION
FLUIDS
FUELS
GAS FUELS
GASES
GASIFICATION
GRAVIMETRIC ANALYSIS
HYDROGEN COMPOUNDS
INFORMATION
MATERIALS
MOLDING
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
SYNTHESIS
TESTING
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
010402 - Coal
Lignite
& Peat- Purification & Upgrading