Methyl decanoate | C11H22O2 - PubChem
Methyl hexanoate, methyl octanoate, methyl decanoate, methyl dodecanoate, methyl tetradecanoate and methyl hexadecanoate. Thermodynamics — Contents lists available at ScienceDirect J. Photodegradation in solution of copolymers of methyl vinyl ketone and methyl isopropenyl ketone with methyl methacrylate Copolymers of methyl vinyl ketone MVK and methyl isopropenyl ketone MIK with methyl methacrylate MMA , have been pr.
Thermochemistry of methyl-D-glucopyranosides and methyl-D-galactopyranosides A Parr static bomb calorimeter was modified to reduce and stabilize the heat exchange between the calorimetric vess.
Methyl methacrylate-methyl isopropenyl ketone copolymers: A vibrational assignment for methyl formate and methyl acetate The infrared spectra of methyl formate and methyl acetate in the vapor phase and as solutions in CS2 and CCl4 have been.
Methyl chloride and behaviour. Vapor pressures Methylesters Vaporization enthalpy a b s t r a c t Vapor pressures of six saturated Fatty Acid Methyl Esters FAMEs , methyl hexanoate or methyl caproate , methyl octanoate or methyl caprylate , Methyl decanoate or methyl caprate , methyl dodecanoate or methyl laurate , methyl tetradecanoate or methyl myristate , and methyl hexadecanoate or methyl palmitate were measured from 1 Pa to kPa and at temperature range between and K using a static apparatus.
The experimental data P-T were compared with the available literature data. Introduction Fossil fuels are depleting because of the increasing demand particularly from economically emerging countries.
A way to replace petrodiesel is the use of biodiesel which is mainly obtained from fatty acids triglycerides contained in vegetable oils soy, corn, cotton seed oil. A mixture of long chain alkyl esters is recovered through catalyst transesterification of triglycerides with alcohols such as methanol. Vapor pressure is an essential physicochemical property of fuels because it reflects the volatility and security of the fuel in addition to being important in the development of separation processes.
As biodiesel consists predominantly of monoalkyl esters of long chain fatty acids FAMEs , we reported vapor pressure measurements of saturated FAMEs from C6 to C16 alkyl chain present in the light fraction of biodiesel. From the temperature dependence of the vapor pressures, enthalpies of vaporization DvapH of the FAMEs were calculated and compared with the available literature data. The compounds were used without further purification. Apparatus Vapor pressures were measured using a static apparatus .
A short description with the main points is given below and represented in Fig. Thermodynamics — Table 1 Source and purity mass fraction of compounds. Schematic figure of the static apparatus. The measurement cell containing the compound is then connected to the apparatus and the compound degassed by several heating — cooling and purges cycles, via valves V1 and V3 valve V2 closed.
At the end of the degassing stage, the cell is immersed in the thermoregulated bath. Once the equilibrium temperature is reached, valve V2 is opened. The used pressure sensor is from MKS, type , model A.
Uncertainty on the vapor pressures and system temperature The uncertainty of the measurements is estimated to be: The minimized objective function Q is as follows: Thermodynamics — 10 Pexp.
For methyl hexanoate, Fig. In the same way, we are in quite good agreement with Van Genderen et al. As for methyl octanoate and methyl decanoate, our experimental data are in good agreement with the different literature data Fig. Some points from Bonhorst et al. Table 3 Antoine equation parameters A. At low pressures 53 Pa and Pa , a very good agreement is observed with Chirico and Frenkel values relative deviation: Several authors studied methyl hexadecanoate and often in a narrow temperature range [15,16,21—23,25—28], Fig.
The comparison between Scott et al. From the fitting of the vapor pressures, the enthalpy of vaporization at mean temperature, Tm, of the methyl esters DvapH, was determined and subsequently the vaporization enthalpy at The correlation of enthalpies of vaporization with the number of C-atoms in the series of homologues is a valuable test to check the internal consistency of the experimental results.
The obtained values are in very good agreement with Mansson et al. Comparison with literature data. Enthalpy of vaporization of methyl esters versus the number of carbons of the ester nC, s, this work; x, Ref. Conclusion In this work, we presented vapor pressures of six FAMEs in a large pressure range from 1 Pa to kPa determined by a static apparatus.
From the experimental T-P values, the calculated enthalpies of vaporization DvapH Goodwin, Synthesis of biodiesel via acid catalysis, Ind.
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