ABSTRACT

The critical pressures and the critical temperatures of normal alkanes CnH2n+2 with carbon numbers 40, 44,and 60 have been measured by the pulse-heating technique. A new method of calculation of the correction factors in pulse-heating experiments has been suggested. The results of earlier experiments (E.D. Nikitin,P.A. Pavlov, A.P. Popov, Fluid Phase Equilib., 141, 1997, pp. 155.164.) for n-alkanes with n = 19, 20, 21,22, 23, 24, 26, 28, 30, and 36 have been recalculated using this method. Equations for the estimation ofthe critical temperatures and pressures of normal alkanes (n . 5) have been suggested. The experimental critical properties have been compared with the estimations made by the Constantinou/Gani methodand equations developed by Lemmon and Goodwin.

Compounds

#	Formula	Name
1	C40H82	tetracontane
2	C44H90	tetratetracontane
3	C60H122	hexacontane
4	C19H40	nonadecane
5	C20H42	eicosane
6	C21H44	heneicosane
7	C22H46	docosane
8	C23H48	tricosane
9	C24H50	tetracosane
10	C26H54	hexacosane
11	C28H58	octacosane
12	C30H62	triacontane
13	C36H74	hexatriacontane

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Phase	Method	#Points
POMD	1	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	1	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	2	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	2	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	3	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	3	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	4	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	4	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	5	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	5	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	6	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	6	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	7	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	7	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	8	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	8	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	9	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	9	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	10	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	10	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	11	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	11	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	12	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	12	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1
POMD	13	Critical temperature, K ; Liquid	Liquid Gas	Pulse heating method	1
POMD	13	Critical pressure, kPa ; Liquid	Liquid Gas	Pulse heating method	1

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Critical temperatures and pressures of C40, C44, and C60 normal alkanes measured by the pulse-heating technique

Nikitin, E. D.[Eugene D.], Popov, A. P.[Alexander P.]

ABSTRACT