Densities of hydrocarbons in their saturated vapor and liquid states

Abstract

The sum and differences of the saturated vapor and liquid densities of 23 hydrocarbons were used to develop the following reduced density relationships for these saturated states:

Thermodynamic properties of (acetone+methanol+2-butanol ) atT=298.15K

“…Monotonic variation is shown by those mixtures which present the extreme values of excess molar volume {lower expansive behaviour for increasing composition of acetone in (acetone + 2-butanol) and lower contractive behaviour for increasing composition of acetone in (acetone + methanol), while the binary (methanol + 2-butanol) displays a slight maximum (x ∼ = 0.1)}. This fact points out the tendency that when packing different alcohol (1), (4), and (5), and root-mean-square deviations (12) (SDR), Bradford-Thodos (13) (BT), Riedel (14) (Ri), Narsimhan (15) (N), and Yen-Woods (16) (YW)} and refractive indices {Lorentz-Lorenz (18) (LL), Dale-Gladstone (19) (DG), Arago-Biot (20) (AB), Eykman (21) (E), Newton (22) (Nw), Oster (23) molecules, the disruption of hydrogen bonds between methanol molecules is induced by the introduction of secondary alcohol molecules. Such alteration yields to sudden expansive behaviour at low methanol compositions, which is decreased to moderate positive values towards higher methanol mole fractions.…”

“…Measured experimental properties were compared with those estimated by means of several relations. The density of the mixtures was estimated by the equations of HankinsonBrobst-Thompson (10) (HBT), Rackett (11) (R), Spencer and Danner modified Rackett (12) (SDR), Bradford-Thodos (13) (BT), Riedel (14) (RI), Narsimhan (15) (N), and Yen-Woods (16) (YW) using the mixing rules proposed by the authors and Kay's (modified PrausnitzGunn combination) rule. (17) The refractive indices were compared with the values predicted by Lorentz-Lorenz (18) (LL), Dale-Gladstone (19) (DG), Arago-Biot (20) (AB), Eykman (21) (Ey), Newton (22) (N), Oster (23) (O), and Eyring-John (24) (EJ) mixing rules.…”

Modelling and experimental thermodynamic data of hydroxylic compounds (C1-C6) as a function of temperature

“…This replacement has overcome the limitations in use for the original model, which were due to the Mathias and Copeman vapor pressure dependent parameters. The Rackett equation of state and its modification was also tested [52][53], as well as other different methods (Bradford-Thodos, Riedel, Narsimhan, Yen-Woods, Bhirud and Campbell-Thodos models) [54][55][56][57][58][59], in order to analyze how accurate densities are predicted.…”

“…In order to test the accuracy of different corresponding states methods for the prediction of saturated liquid density of this kind of compounds, we applied the methods proposed by Bradford-Thodos, Riedel, Narsimhan, Yen-Woods, Bhirud and Campbell-Thodos [54][55][56][57][58][59]…”

Densities, refractive indices, and derived excess properties of {x1CH3COOCH3+x2CH3OH+(1−x1−x2)CH3CH(OH)CH3} at the temperature 298.15 K

“…Spencer and Danner modified Rackett, (7) Bradford-Thodos, (8) Riedel, (9) Narsimham, (10) and Yen-Woods (11) methods using expanded mixing rules proposed by those authors or the Kay (modified Prausnitz-Gunn combination) rule. (12) The refractive indices were compared with the predicted results from the mixing rules proposed by Lorentz-Lorenz, Dale-Gladstone, Arago-Biot, (13) Eykman, (14) Newton, (15) Oster, (16) and Eyring-John.…”