Elastomer Impact When Switch-Loading Synthetic Fuel Blends and Petroleum Fuels
Final technical rept. Jul 2004-Apr 2005
TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
Pagination or Media Count:
When some elastomer rubber compounds, and specifically those used for seals in fuel-wetted components of vehicles and equipment, are suddenly switch-loaded from a fuel of given composition to one of a somewhat different composition, swellshrink issues relating to seal performance may arise, possibly leading to fuel leakage. The key objective of this study was to evaluate what happens to the elastomers with sudden switches from a conventional petroleum-derived fuel to a synthetic non-aromatic paraffinic fuel produced from natural gas using gas-to-liquids GTL and Fischer-Tropsch FT synthesis processes with or without surrogate aromatics. Results from this evaluation indicate that, for the nitrile elastomers evaluated, relatively large swings in swell occur with switches between fuels of varying levels of aromatic content and the synthetic aviation turbine fuel containing no aromatics. These observations support the conclusion that impact on the nitrile elastomer when switch-loading synthetic non-aromatic and petroleum-derived fuel, is highly dependent on aromatic hydrocarbon type and concentration.
- Adhesives, Seals and Binders