Formula, molecular weight and properties of fatty acids ...
Formula, molecular weight and properties of fatty acids and their methyl esters.
Fatty acid Methyl ester
Palmitic acid Methyl palmitate
Stearic acid Methyl stearate
Oleic acid Methyl oleate
Linoleic acid Methyl linoleate
Linolenic acid Methyl linolenate
Formula Acronym Molecular Melting point Cetane
weight [?C]
number
C16H32O2 C16:0
256.4
63-64
---
C17H34O2
270.5
30.5
74.5
C18H36O2 C18:0
184.5
70
---
C19H38O2
198.5
39
86.9
C18H34O2 C18:1
282.5
16
C19H36O2
296.5
-20
--47.2-55
C18H32O2 C18:2
280.5
-5
C19H34O2
294.5
-35
--28.5-42.2
C18H30O2 C18:3 C19H32O2
278.4 292.5
-11 -52/-57
--20.6-22.7
American and European specifications for pure biodiesel (B100) prior to use or
blending with diesel fuel.
Property
Acid Number Calcium and magnesium Carbon residue Cetane number Cloud point Cold soak filterability Copper strip corrosion Density Distillation - Atmospheric equivalent temperature 90% recovery Flash point Glycerin ? Free Monoglyceride Diglyceride Triglyceride Glycerin ? Total Iodine value Kinematic viscosity - 40?C Linolenic acid methyl ester Methanol content Oxidation stability Phosphorus content Polyunsaturated (>4 double bonds) methyl esters Sodium and potassium Sulfated ash Sulfur (S15) Sulfur (S500) Total contamination Viscosity 40?C Water content Water and sediment
ASTM D 6751-08 limit
maximum 50 5
maximum 0.050 minimum 47 report maximum 360 maximum 3 ---
DIN EN 14214 limit
maximum 50 ---
maximum 0.3 minimum 51
report maximum 360
Class 1 860 - 900
maximum 360
---
minimum 130 maximum 0.020
------maximum 0.240 --1.9 ? 6.0 --maximum 0.20 minimum 3 10 ---
minimum 101 maximum 0.02 maximum 0.80 maximum 0.20 maximum 0.20 maximum 0.25
120 1.9 ? 6.0
12 maximum 0.20
minimum 6 10
maximum 1.00
maximum 5 maximum 0.02 maximum 15.0 maximum 500
------maximum 0.050
maximum 5 maximum 0.02
----maximum 24.0 3.50 ? 5.00 maximum 500 maximum 0.050
Unit
mgKOH/g ppm wt% No. ?C sec
No./Rating Kg m3 -1
?C
?C wt% wt% wt% wt% wt% unit mm2 sec-1 wt% wt% hours ppm wt%
ppm wt% ppm ppm ppm mm2 ppm Vol.%
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