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 00:00:00 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
COMBUSTION PRODUCTS
CORROSIVE EFFECTS
FURNACES
FUEL SUBSTITUTION
REFRACTORIES
RESIDUAL FUELS
INDUSTRIAL PLANTS
CORROSION
EROSION
EXPERIMENTAL DATA
PERFORMANCE TESTING
THERMAL CONDUCTIVITY
THERMAL INSULATION
CHEMICAL REACTIONS
DATA
FUEL OILS
FUELS
INFORMATION
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
TESTING
THERMODYNAMIC PROPERTIES
320301* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Energy Sources