caa a22 4500 465795854 CHVBK 20180323112037.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02540768 doi (NATIONALLICENCE)springer-10.1007/BF02540768 Predicting cetane numbers of n-alcohols and methyl esters from their physical properties [Elektronische Daten] [B. Freedman, M. Bagby] Cetane numbers (C#) for the homologous series of straight-chain, saturated n-alcohols, C5−C12 and C14, were determined according to ASTM D 613. Measured C# ranged from 18.2-80.8 and increased linearly with carbon number (CN). Regression analyses developed equations that related various physical properties or molecular characteristics of these alcohols to calculated C#. The degree of relationship between measured and calculated C# was expressed as R2. The decreasing order of the precision with which these properties correlated with C# was: boiling point (bp)>melting point (mp)>CN>heat of combustion (HG)>refractive index (n20 D)>density (d). This ranking was based upon R2 (0.99-0.96) and the Average % error (2.8-7.2%). C# were also determined for straight-chain homologs of saturated methyl esters with CN of 6, 10, 12, 14, 16 and 18. C# ranged from 18.0-75.6 and increased curvilinearly with CN. Equations were also developed that related physical properties of these esters to C#. The precision with which these properties correlated with C# was: bp>viscosity (V)>heat of vaporization (HV)>HG>CN>surface tension (ST)>mp>n20 D>d. R2 ranged from 0.99 for bp to 0.98 for d. Equations for the alcohols were linear or quadratic, while equations for the esters were linear, quadratic or cubic based upon statistical considerations that included a Student's t-test. With related physical properties and these equations, accurate predictions of C# can be made for saturated n-alcohols and methyl esters. AOCS Press, 1990 Alternative fuels nationallicence prediction nationallicence regression analysis nationallicence saturated alcohols nationallicence saturated esters nationallicence statistics nationallicence Freedman B. Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., 61604, Peoria, IL aut Bagby M. Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., 61604, Peoria, IL aut Journal of the American Oil Chemists' Society Springer-Verlag 67/9(1990-09-01), 565-571 0003-021X 67:9<565 1990 67 11746 https://doi.org/10.1007/BF02540768 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02540768 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Freedman B. Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., 61604, Peoria, IL aut NATIONALLICENCE 700 1- Bagby M. Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 1815 N. University St., 61604, Peoria, IL aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/9(1990-09-01), 565-571 0003-021X 67:9<565 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer