Effects of alternate fuels refractory test facility test 3. Part 1. Analysis of alumina and aluminosilicate fibrous insulations exposed to the combustion products of No. 6 residual oil

Technical Report · Thu May 01 04:00:00 EDT 1980

OSTI ID:5317731

Federer, J I; Tennery, V J

Residual oil is being used as an alternate fuel to natural gas and distillate oil in many industrial process heat applications. A consequence of this action is more rapid deterioration of refractories and refractory insulations due to impurities in the oil that are not present in gas and distillates. In this test alumina-based fibrous insulations were exposed to the combustion products of No. 6 residual oil to identify specific fuel impurity reactions and to compare the results with those in other tests using oils containing different impurity levels. The four specimens in this test contained 46 to 98% Al/sub 2/O/sub 3/ equivalent; the balance was mostly SiO/sub 2/. These were installed on the wall of a test furnace and exposed to the combustion products for 1002 h at a hot-face temperature of 1350/sup 0/C. The major impurities in the oil - Fe, Mg, Na, Ni, P, Si, Ti, and V - and two minor impurities, Ba and Ca, were mostly concentrated in a thin reaction layer on the hot face. Some impurities, including sulfur, penetrated the reaction layer into the fibers. The reaction layer on each specimen contained crystalline phases, but only the specimen of highest Al/sub 2/O/sub 3/ content had new crystalline phases containing fuel impurities. The reaction layer on the other specimens contained original crystalline phases plus glass. Glass probably formed as a result of reaction between SiO/sub 2/ and Na/sub 2/O derived from the fuel, and the amount of glass increased with increasing SiO/sub 2/ content. None of the insulations were seriously degraded during the test exposure. The temperature difference between the hot and cold faces remained approximately constant during the exposure, indicating no substantial change in the effective thermal conductivity.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5317731
• Report Number(s): ORNL/TM-7267
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320301* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Energy Sources
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
CORROSION
CORROSIVE EFFECTS
DATA
EROSION
EXPERIMENTAL DATA
FUEL OILS
FUEL SUBSTITUTION
FUELS
FURNACES
INDUSTRIAL PLANTS
INFORMATION
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE TESTING
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
REFRACTORIES
RESIDUAL FUELS
TESTING
THERMAL CONDUCTIVITY
THERMAL INSULATION
THERMODYNAMIC PROPERTIES