n - PATh :.: Process and Product Applied Thermodynamics research ...

More documents

Recommendations

Info

P / MPa 12 10 8 6 4 2 0 0.0 0.2 0.4 0.6 0.8 1.0 x, y CO2 Modeling Figure III.22. Predictions of the vapor-liquid equilibrium of CO2/n-octane system at 313.15, 328.15 and 348.15 K. Legend as in Figure III.21. Binary parameters were adjusted at 328 K. P / MPa 18 16 14 12 10 8 6 4 2 0 0.0 0.2 0.4 0.6 0.8 1.0 x, y CO2 Figure III.23. Predictions of the vapor-liquid equilibrium of CO2/methylcyclohexane system at 270, 311, 338.9 and 477 K. Legend as in Figure III.22. Binary parameters were adjusted at 311 K. - 149 -
Modeling Finally, Figure III.24 presents the results obtained for the CO2/decalin mixture. This mixture presents a region of liquid-liquid equilibria as reported by Tiffin et al. (1978). The upper critical solution temperature (UCST), identified by the star in the figure, occurs at 316.45 K. Both versions overestimate the liquid-liquid region by predicting a LLE at a temperature above the UCST. However, it can be observed that the polar soft-SAFT gives better predictions at lower and higher temperatures than the original soft-SAFT EoS. Table III.11 compares the adjusted binary parameters when the quadrupole moment is considered explicitly and in an effective way. As observed before, when the polar term is included, the binary energy and size parameters are consistently closer to unity than when the non-polar soft-SAFT EoS is used for the same reasons mentioned above. Also, the CO2/alkane mixtures were found to be more sensitive to the size binary parameter and although slightly differences are found between them, it was decided not to fix the parameter in order to obtain a quantitative description of the experimental data. P / MPa 40 35 30 25 20 15 10 5 0 0 0.2 0.4 0.6 0.8 1 x, y CO2 Figure III.24. Predictions of the vapor-liquid equilibrium of CO2/decalin system at 298, 348 and 423 K. Legend as in Figure III.23. Binary parameters were adjusted at 323 K. The star indicates the upper critical solution temperature of this mixture. - 150 -
Page 1 and 2:
Ana Maria Antunes Dias Universidade
Page 3 and 4:
o júri presidente Prof. Dr. Joaqui
Page 5 and 6:
palavras-chave resumo perfluoroalca
Page 7 and 8:
Contents Notation List of Tables Li
Page 9 and 10:
Notation Abbreviations AAD EoS LCST
Page 11 and 12:
List of Tables Table I.1 Average Bo
Page 13 and 14:
Table III.6 Adjusted Binary Paramet
Page 15 and 16:
Figure II.9 Comparison between corr
Page 17 and 18:
Figure III.8 Temperature-density di
Page 19 and 20:
Figure III.25 Vapor-phase mole frac
Page 21 and 22:
I.1. Fluorine Properties General In
Page 23 and 24:
Table I.2. Physicochemical Properti
Page 25 and 26:
General Introduction order to compa
Page 27 and 28:
General Introduction the numerous a
Page 29 and 30:
General Introduction carbon dioxide
Page 31 and 32:
General Introduction animals. That
Page 33 and 34:
General Introduction Table I.3. Lit
Page 35 and 36:
References General Introduction Ban
Page 37 and 38:
General Introduction Hildebrand, J.
Page 39 and 40:
General Introduction Rowinsky EK. N
Page 41 and 42:
II. Part EXPERIMENTAL METHODS, RESU
Page 43 and 44:
Experimental Methods, Results and D
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Table II.3. (continued) T K ρexp g
Page 51 and 52:
ρ / g.cm-3 1.750 1.730 1.710 1.690
Page 53 and 54:
Page 55 and 56:
I. 3. Vapour pressure I.3.1. Biblio
Page 57 and 58:
I.3.2. Apparatus and Procedure Expe
Page 59 and 60:
I.3.3. Experimental Results and Dis
Page 61 and 62:
Page 63 and 64:
Table II.8. (continued) T K Pexp kP
Page 65 and 66:
Page 67 and 68:
ΔH vap = TΔS vap 2⎛ d ln P ⎞
Page 69 and 70:
I.4. Solubility at atmospheric pres
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
x2 (T,P2) 7.0E-03 6.0E-03 5.0E-03 4
Page 81 and 82:
L 2,1 0.70 0.60 0.50 0.40 0.30 285
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
P / MPa 6 5 4 3 2 1 0 P / MPa 14 12
Page 95 and 96:
II.6. Liquid - Liquid Equilibrium I
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
0 τ β Δ1 2Δ1 [ 1+ B τ + B τ +
Page 103 and 104:
References Experimental Methods, Re
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
III.1. Introduction Modeling Most c
Page 113 and 114:
Modeling The pioneering work of Wer
Page 115 and 116:
III.2. Soft-SAFT Model Modeling A S
Page 117 and 118: Modeling The equation of state is w
Page 119 and 120: Chain Term Modeling Originally Wert
Page 121 and 122: Modeling The model is easily extend
Page 123 and 124: ( ) ( ) ∑∑∑ 3 2 2 2 2 qq 32π
Page 125 and 126: Modeling HRT is a promising theory,
Page 127 and 128: ( ρ) ρ , 0 ≤ ρ ( ρ) 2 Modelin
Page 129 and 130: III.3. Application to Pure Compound
Page 131 and 132: Modeling From the optimised paramet
Page 133 and 134: T / K 400 350 300 250 200 150 100 5
Page 135 and 136: ln Pvap 1.0E+01 1.0E+00 1.0E-01 1.0
Page 137 and 138: Modeling Table III.2. Absolute Aver
Page 139 and 140: Modeling The correlation coefficien
Page 141 and 142: Pvap (MPa) 4.00 3.50 3.00 2.50 2.00
Page 143 and 144: Modeling The mixture parameters a a
Page 145 and 146: Modeling the assumptions made by th
Page 147 and 148: Modeling between oxygen and perfluo
Page 149 and 150: xSolute 5.5E-03 5.0E-03 4.5E-03 4.0
Page 151 and 152: Modeling previous work, dealing wit
Page 153 and 154: Modeling These results confirm that
Page 155 and 156: Modeling CO2 binary mixtures using
Page 157 and 158: Modeling average deviation (AAD) be
Page 159 and 160: P / MPa 14 12 10 8 6 4 2 0 0 0.2 0.
Page 161 and 162: Modeling Figures III.16, III.17 and
Page 163 and 164: Modeling calculations from the orig
Page 165 and 166: Table III.9. References for VLE exp
Page 167: P / MPa 20 18 16 14 12 10 8 6 4 2 0
Page 171 and 172: III.4.4. VLE and LLE of Alkane and
Page 173 and 174: Modeling number of perfluro-n-alkan
Page 175 and 176: y C6F14 1.0 0.8 0.6 0.4 0.2 0.0 0.0
Page 177 and 178: P / MPa 0.08 0.07 0.06 0.05 0.04 0.
Page 179 and 180: P / MPa 0.12 0.10 0.08 0.06 0.04 0.
Page 181 and 182: Modeling approach based on the meth
Page 183 and 184: Modeling Blas, F. J.; Vega, L. F.,
Page 185 and 186: DIPPR, Thermophysical Properties Da
Page 187 and 188: Modeling Hildebrand, J. H.; Fisher,
Page 189 and 190: Modeling McCabe, C.; Jackson, SAFT-
Page 191 and 192: Modeling Poling, B.; Prauznitz, J.;
Page 193 and 194: Modeling Wertheim, M. S., Fluids wi
show all

n - PATh :.: Process and Product Applied Thermodynamics research ...

Create successful ePaper yourself

Delete template?

Save as template?