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Preparation of a Research Jet Fuel Composition Comprised of Nearly Exclusively Methyl-Branched Tetradecane Isomers Having a Freezing Point below −47 ℃. 赵云霞 2012.12.01. Abstract and Introduction. alternative aviation fuels
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Preparation of a Research Jet FuelComposition Comprised of NearlyExclusively Methyl-Branched Tetradecane Isomers Having a FreezingPoint below −47℃ 赵云霞 2012.12.01
Abstract and Introduction alternative aviation fuels 1.potential fuels contains only a limited number of isomers 2.alternative fuels fail the distillation distribution specification in current use
such an alternative blendstock were used to make a 50/50 alternative/petroleum blend • a generic surrogate research fuel comprised of isomers of tetradecane that meet the −47 ℃ freezing point specification of JP-8
1-tetradecene n-tetradecane hydroisomerizedusing a Pt/US-Y zeolitecatalyst raw tetradecane mixture is separated from cracked products by distillation
the remaining n-tetradecane content must be reduced to <1.5% solvent dewaxing
EXPERIMENTAL SECTION Fixed-Bed Catalytic Reactor System 0.5% Pt/US-Y ZeoliteHydroprocessingCatalyst Producing n-Tetradecane n-TetradecaneIsomerization Separating C14 Isomers from Cracked Products Freezing-Point Determinations Solvent Dewaxing
RESULTS AND DISCUSSION Hydrogenating the 1-Tetradecene Isomerization of n-Tetradecane
C=0.81 C14-95% n-C14-23% -13℃ C=0.88 n-C14-7% -27℃
CONCLUSIONS • a mixture of predominantly methyl-branched C14alkane isomers with a freezing point below −47 ℃ • n-C14to hydroisomerization using a 0.5% Pt/US-Y zeolitecatalyst at a fractional conversion just under 0.9 • The cracked products can be efficiently separated from the C14fraction via fractional vacuum distillation • the residual n-C14content must be reduced to <1.5 wt %.
