Design, engineering and evaluationn of refractory liners for slagging gasifiers. Seventh quarterly technical progress report, April 1-June 30, 1980
Temperatures in slagging gasifiers are in the 2500 to 3300/sup 0/F range, which limits the materials that can be used. In addition, the combination of high pressure (up to 1500 psi) with water vapor and the presence of carbon monoxide and hydrogen can present corrosion problems for refractories. The silica in aluminum silicate materials is chemically attacked by hydrogen and may be removed either by formation of volatile silicon monoxide, or hydrosilicic acid, which is leached out and redeposited in another area of the gasifier. The action of carbon monoxide on iron compounds in refractories is also disruptive. Potential refractory failure mechanisms in coal gasifier assemblies include: gaseous corrosion from hydrogen, steam, carbon monoxide, carbon dioxide and alkalies; slag corrosion; abrasion and erosion due to high velocity particles in gas streams; thermomechanical failures resulting in hot spots on the shell; and condensation of acids when the steel shell temperature is below the acid dew point. Low iron, high alumina refractories are the presently preferred materials for coal gasification plants. The atmospheres and other conditions found in vessels used in coal gasification require the use of dense and insulating high Al/sub 2/O/sub 3/ refractory shapes and castables. Considerable research is required to establish optimum refractory system and design methods for slagging coal gasifiers. This program is a first attempt at the required research.
- Research Organization:
- IIT Research Inst., Chicago, IL (USA)
- DOE Contract Number:
- AC05-78OR13410
- OSTI ID:
- 5270784
- Report Number(s):
- IITRI-M-6043-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Design, engineering, and evaluation of refractory liners for slagging gasifiers
Refractory liner materials used in slagging gasifiers
Related Subjects
36 MATERIALS SCIENCE
COAL GASIFICATION
PRESSURE VESSELS
LINERS
REFRACTORIES
CORROSION RESISTANCE
DESIGN
EVALUATION
TEST FACILITIES
CORROSION
CHEMICAL REACTIONS
CONTAINERS
GASIFICATION
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
360200 - Ceramics
Cermets
& Refractories