The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY)2. REPORT TYPE 3. DATES COVERED (From -To) AFRL/RZPF SPONSORING/MONITORING AGENCY REPORT NUMBER(S) AFRL-RZ-WP-TR-2011-2084 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution unlimited. SUPPLEMENTARY NOTESReport contains color. PA Case Number: 88ABW-2011-3415; Clearance Date: 14 Jun 2011. ABSTRACTThe overall aim of this effort was to provide fit-for-purpose testing and subject matter expertise to UTC and AFRL to support the evaluation of emerging synthetic aviation fuels. The report contains information on the evaluations of various synthetic aviation fuels including: Sasol IPK, R-8 HRJ SPK, R-8x HRJ SPK, Boeing Flight Fuels, Camelina HRJ SPK, Camelina/JP-8 (HRJ8), R-8/Jet A, Tallow HRJ SPK and Tallow/JP-8 (HRJ8). In addition, miscellaneous analyses including dielectric constants of the synthetic aviation fuels, lubricity, Ignition Quality Tests (IQT), JP-8+100 fuel/water separation tests (SAE J1488) and existent gums are reported. It is concluded that the testing performed to date provides strong evidence that blends composed of 50% synthetic aviation fuel (FT IPK and HRJ SPK) and 50% petroleum-based fuel will be more than adequate as drop-in replacements for current petroleum-based fuels. SUBJECT TERMSalternative fuels, synthetic aviation fuel, Fischer-Tropsch fuel (FT), fuel certification, hydrotreated renewable jet (HRJ), iso-paraffinic kerosene (IPK), synthetic paraffinic kerosene (SPK) List of FiguresFigure Page 1 List of TablesApproved for public release; distribution unlimited. Executive SummaryThe overall aim of this effort was to provide fit-for-purpose testing and subject matter expertise to UTC and AFRL to support the evaluation of emerging synthetic aviation fuels. This report contains information on the evaluation of various synthetic aviation fuels including: Sasol IPK, R-8 HRJ SPK, R-8x HRJ SPK, Boeing Flight Fuels, Camelina HRJ SPK, Camelina/JP-8 (HRJ8), R-8/Jet A, Tallow HRJ SPK and Tallow/JP-8 (HRJ8). In addition to standardized testing, detailed studies were carried out in the following areas: dielectric constants, lubricity, ignition quality, fuel/water separation, and ...
As an alternative to established laboratory protocols, partial least-squares (PLS) regression models based on Fourier transform infrared (FT-IR) spectra were developed for the rapid and simultaneous determination of several middle distillate fuel properties. Requiring less than 2 mL of sample, the PLS models use a single wavelength range of baseline-uncorrected FT-IR spectra. Several preprocessing parameters were investigated, including mean-centering of the raw spectra and mean-centering of first- and second-difference spectra. In addition, modification to the calibration parameters included varying the number of cross-validation rotation samples from 5 to 50, applying a baseline correction to the spectra, and using restricted wavelength regions. In order to obtain an accurate estimate of the prediction error, we applied the method provided by Faber and Kowalski [Appl. Spectrosc. 51, 660 (1997)] that corrects for the measurement error in the reference values. On the basis of this work, the following middle distillate fuel properties may be confidently estimated by FT-IR: gravity, API°; density, g/mL; kinematic viscosity, cSt, 40 °C; boiling point at 50% recovery, °C; cetane index; carbon, wt %; hydrogen, wt %; carbon-to-hydrogen ratio, C/H; net heat of combustion, MJ/Kg (or BTU/lb); monocyclic aromatics, wt %; dicyclic aromatics, wt %; polycyclic aromatics, wt %; and total aromatics, wt %. Estimation of several other properties is also possible where reduced precision is acceptable.
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