TY - JOUR
T1 - Density Measurements and PC-SAFT Modeling for Beef Tallow Fatty Acid Methyl Esters (FAME Mixture) + Alkane up to 70 MPa
AU - García-Morales, Ricardo
AU - Domenzaín-González, José
AU - Verónico-Sánchez, Francisco J.
AU - Zúñiga-Moreno, Abel
AU - Bouchot, Christian
AU - Elizalde-Solis, Octavio
N1 - Publisher Copyright:
© 2023 America n Chemical Society.
PY - 2023/5/11
Y1 - 2023/5/11
N2 - Biodiesel is mainly constituted by fatty acid alkyl esters, and the effect of adding alkane compounds is of great importance in order to analyze the changes in the thermophysical properties under high pressure that is of relevance in diesel engines. This work is aimed at the study of density behavior of two systems formed by beef tallow fatty acid methyl esters (FAME mixture) + alkane (decane or dodecane) in the temperature range of 303-393 K and in the pressure range of 0.2-68.29 MPa. Experiments were carried out by means of two vibrating tube densimeters with an expanded uncertainty in density of 0.7 kg·m-3. Transesterification of waste beef tallow by using methanol at supercritical conditions was used to obtain biodiesel. The FAME mixture was constituted by methyl tetradecanoate, methyl hexadecanoate, methyl octadecenoate, and methyl (Z)-octadec-9-enoate. Density behavior was correlated using the Tammann-Tait equation and modeled with the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state. Density correlation deviations using the Tammann-Tait equation were found to be less than 0.05% and 4.15 kg·m-3 for the average absolute deviation (AAD) and standard deviation (STD), respectively. The PC-SAFT modeling yielded an AAD = 0.11% and an STD = 1.15 kg·m-3. The behavior for density and the derived thermodynamic properties were explained in terms of the fatty acid methyl ester content.
AB - Biodiesel is mainly constituted by fatty acid alkyl esters, and the effect of adding alkane compounds is of great importance in order to analyze the changes in the thermophysical properties under high pressure that is of relevance in diesel engines. This work is aimed at the study of density behavior of two systems formed by beef tallow fatty acid methyl esters (FAME mixture) + alkane (decane or dodecane) in the temperature range of 303-393 K and in the pressure range of 0.2-68.29 MPa. Experiments were carried out by means of two vibrating tube densimeters with an expanded uncertainty in density of 0.7 kg·m-3. Transesterification of waste beef tallow by using methanol at supercritical conditions was used to obtain biodiesel. The FAME mixture was constituted by methyl tetradecanoate, methyl hexadecanoate, methyl octadecenoate, and methyl (Z)-octadec-9-enoate. Density behavior was correlated using the Tammann-Tait equation and modeled with the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state. Density correlation deviations using the Tammann-Tait equation were found to be less than 0.05% and 4.15 kg·m-3 for the average absolute deviation (AAD) and standard deviation (STD), respectively. The PC-SAFT modeling yielded an AAD = 0.11% and an STD = 1.15 kg·m-3. The behavior for density and the derived thermodynamic properties were explained in terms of the fatty acid methyl ester content.
UR - http://www.scopus.com/inward/record.url?scp=85156236252&partnerID=8YFLogxK
U2 - 10.1021/acs.jced.3c00033
DO - 10.1021/acs.jced.3c00033
M3 - Artículo
AN - SCOPUS:85156236252
SN - 0021-9568
VL - 68
SP - 1091
EP - 1104
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
IS - 5
ER -