Enhancing Low-Temperature Phase Stability of a 50/50 Methanol/Hydrocarbon Blend 881680
Separation of roughly equal volume mixtures of methanol and gasoline into two phases at low temperature may cause problems for vehicles that are designed to operate on these mixtures. Cosolvent alcohols (C2-C12) and surfactants were evaluated as additives for enhancing phase stability at -25°C of a blend containing SO volume percent methanol, 40 percent isooctane, and 10 percent toluene (simulating a 50/50 methanol/gasoline mixture).
For alcohol cosolvents, the amount required decreased with increasing carbon number (number of carbon atoms per molecule) from about 50 percent with C2 to about 6 percent for C8 through C12 A simple cost analysis indicated that decanol (C10) provided the minimum treatment cost for preventing separation at -25°C: $0.13/galloπ. Of the various commercial nonionic surfactants and various anionic fatty acid surfactants evaluated, only palmitic acid (C16) showed good effectiveness.
Citation: Lee, H., Shah, D., and Brinkman, N., "Enhancing Low-Temperature Phase Stability of a 50/50 Methanol/Hydrocarbon Blend," SAE Technical Paper 881680, 1988, https://doi.org/10.4271/881680. Download Citation
Author(s):
H. K. Lee, D. O. Shah, N. D. Brinkman
Affiliated:
University of Florida
Pages: 11
Event:
1988 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Fuel Methanol--A Decade of Progress-PT-36, SAE Transactions Journal of Fuels and Lubricants-V97-3
Related Topics:
Cost analysis
Methanol
Gasoline
Hydrocarbons
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