Materials research for the clean utilization of coal. Quarterly progress report, January-March 1979

Technical Report · Tue Jan 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5604394· OSTI ID:5604394

Tests to experimentally verify the thermal-elastic stress analysis for the tension-loaded double-cantilever beam specimen were continued and modifications were made to the stress analysis to more accurately predict the change in stress-intensity with temperature. Tests to experimentally verify the stress analysis were conducted using specimens of both A.I.S.I. type 304 and type 310 stainless steel. The first successful experiment in the apparatus for mechanical testing of ceramics at elevated pressure and temperature was completed. In the dry gas (42% H/sub 2/, 33% CO, 25% CO/sub 2/) environment, CC (CaCO/sub 3/) appears to be stable at 900/sup 0/C and 540 psig. It dissociates at a much lower temperature when steam is present. Preliminary in situ x-ray studies indicate that CC is stable in an atmosphere of CO/sub 2/ at 1100/sup 0/C and 500 psig. The viscosity of slags was measured at various temperatures, for different compositions and exposed to steam or other gases. An extensive study has been made of vapor transport over a high melting (approx. 1700K) potassium-enriched slag derived from Illinois number 6 coal. About 2% of the K was present in relatively volatile form, mainly K/sub 2/SO/sub 4/ and K/sub 2/CO/sub 3/. The rate of release of K, and secondary species such as H/sub 2/O, O/sub 2/, SO/sub 2/, CO/sub 2/ and Na, has been measured over the temperature range 1100-1820K, a N/sub 2/-pressure range of 0.2-0.63 atm, and for K/sub 2/O slag contents over the range 15.4-8.0 mole %. Eight additional reports of operating experiences and failure analysis were entered into the Center's data base.

• Research Organization: National Bureau of Standards, Washington, DC (USA). Center for Materials Science
• DOE Contract Number: EA-77-A-01-6010-002
• OSTI ID: 5604394
• Report Number(s): FE-6010-19
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
MATERIALS
COAL LIQUEFACTION PLANTS
FAILURE MODE ANALYSIS
INFORMATION SYSTEMS
POTASSIUM COMPOUNDS
VAPOR PRESSURE
SLAGS
VISCOSITY
CERAMICS
CORROSION
DEFORMATION
DIFFUSION
EROSION
EVAPORATION
EXPERIMENTAL DATA
FRACTURE PROPERTIES
GRAPHS
MEASURING METHODS
MECHANICAL PROPERTIES
TABLES
TEMPERATURE DEPENDENCE
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
DATA
DATA FORMS
INDUSTRIAL PLANTS
INFORMATION
NUMERICAL DATA
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
THERMODYNAMIC PROPERTIES
010404* - Coal
Lignite
& Peat- Gasification
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
360200 - Ceramics
Cermets
& Refractories
360100 - Metals & Alloys