Accession Number : AD0475006

Title :   THERMAL STABILITY OF HYDROCARBON FUELS.

Descriptive Note : Quarterly progress rept. no. 7, 1 Jun-31 Aug 65,

Corporate Author : PHILLIPS PETROLEUM CO BARTLESVILLE OK RESEARCH DIV

Personal Author(s) : Bagnetto, Lucein

Report Date : 16 SEP 1965

Pagination or Media Count : 64

Abstract : A program to investigate the effect of storage time and temperature on changes in thermal stability quality as measured by the CRC-Modified (SSF) Coker for five widely different fuel types continues to show no significant deterioration of any fuels after 36 weeks at ambient field conditions or 22 weeks at 130 F. After storage at 180 F for 36 days, four of the fuels showed no loss in thermal stability but an HF alkylate fuel containing abour 2% olefins showed a statistically significant loss of about 100 F after storage periods of 6, 18 and 36 days. Removal of dissolved oxygen (to < 1 ppm) from the HF alkylate fuel prior to storage prevented deterioration. This program continues to confirm that there are no severe storage instability problems with any of the selected fuels at storage temperatures up to 130 F. Additional data on the relationship between the 5-ml Bomb and the SSF Coker procedures for fuels in the storage program continue to show that no single correlation can describe all of the fuel types represented. Satisfactory correlations are observed for the aerated fuels if they are divided into three different groups; vis., ASTM Type-A straight run distillates, HF alkylate, and SO2 extracted fuels containing additives. (Author)

Descriptors :   (*FUELS, THERMAL STABILITY), (*HYDROCARBONS, FUELS), STORAGE, OXYGEN, JET ENGINE FUELS, FUEL ADDITIVES, DEGRADATION, AGING(MATERIALS), TABLES(DATA), LIGHT TRANSMISSION, CALORIMETERS.

Subject Categories : Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE