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Journal articleFandiño O, Trusler JPM, Vega-Maza D, 2015,
Phase behavior of (CO2 + H-2) and (CO2+ N-2) at temperatures between (218.15 and 303.15)K at pressures up to 15 MPa
, International Journal of Greenhouse Gas Control, Vol: 36, Pages: 78-92, ISSN: 1750-5836Vapor–liquid equilibrium data are reported for the binary systems (CO2 + H2) and (CO2 + N2) at temperatures between (218.15 and 303.15) K at pressures ranging from the vapor pressure of CO2 to approximately 15 MPa. These data were measured in a new analytical apparatus which is described in detail. The results are supported by a rigorous assessment of uncertainties and careful validation measurements. The new data help to resolve discrepancies between previous studies, especially for the (CO2 + H2) system. Experimental measurements of the three-phase solid–liquid–vapor locus are also reported for both binary systems.The vapor–liquid equilibrium data are modeled with the Peng–Robinson (PR) equation of state with two binary interaction parameters: one, a linear function of inverse temperature, applied to the unlike term in the PR attractive-energy parameter; and the other, taken to be constant, applied to the unlike term in the PR co-volume parameter. This model is able to fit the experimental data in a satisfactory way except in the critical region. We also report alternative binary parameter sets optimized for improved performance at either temperatures below 243 K or temperatures above 273 K. A simple predictive model for the three-phase locus is also presented and compared with the experimental data.
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Journal articleWakeham W, Trusler JPM, 2015,
Anthony Robert Holmes Goodwin (1961-2014) obituary
, Journal of Chemical and Engineering Data, Vol: 60, Pages: 215-216, ISSN: 0021-9568 -
Conference paperTrusler JPM, Marsh KN, Wakeham WA, 2015,
In Memoriam: Anthony (Tony) Goodwin
, Nineteenth Symposium on Thermophysical PropertiesAnthony (Tony) Goodwin was a leading innovator in the field of thermophysics, and widely known as a researcher, author, and journal editor. Following his untimely death in December 2014, at the age of just 53, we review in this paper Tony’s outstanding contributions to the field of thermophysics and recount some of the personal qualities that his many friends and colleagues in the community will cherish.Tony excelled as an experimentalist and devoted much energy to improving a variety of experimental techniques to facilitate measurements of thermophysical properties either under wider ranges of conditions, or with lower uncertainty. In a career spanning academia and industry, he worked on a number of key problems that presented both scientific challenges and opportunities for industrial application. We mention in particular his work on measurements of the speed of sound, relative permittivity, fluid phase behaviour, density and viscosity. In his industrial career, Tony was responsible for the development and testing of sensors for measuring many of these same properties for purposes of downhole fluid analysis in the petroleum industry. He published around 100 articles in the archival scientific journals, edited a number of books, authored or co-authored numerous chapters and was granted a large number of patents. He was also a powerful influence within the Physical Chemistry Division of IUPAC and the International Association of Chemical Thermodynamics. Drawing both on our personal experiences of collaborating with Tony and on his published work, this paper will highlight his lasting scientific achievements.
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Conference paperCadogan S, Maitland GC, Mistry B, et al., 2015,
Diffusion coefficients of carbon dioxide in liquid hydrocarbons at high pressures: Experiment and modeling
, Pages: 69-75 -
Conference paperCadogan S, Maitland GC, Mistry B, et al., 2015,
Diffusion coefficients of carbon dioxide in liquid hydrocarbons at high pressures: Experiment and modeling
, Pages: 144-150In this work we have: • Obtained new experimental data for CO2 diffusion in normal alkanes from C6 to C16 and in squalane (C30H62) • Developed a universal correlation for the n-alkane systems in terms of temperature, solvent molar volume and carbon number • Squalane data suggests that the correlation should become nonlinear at high densities.
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Conference paperAl Ghafri SZ, Efika EC, Trusler JPM, 2015,
A new high-pressure high-temperature apparatus for phase behaviour measurements on multicomponent mixtures
, Pages: 1012-1014 -
Journal articleCadogan SP, Hallett JP, Maidand GC, et al., 2015,
Diffusion Coefficients of Carbon Dioxide in Brines Measured Using <SUP>13</SUP>C Pulsed-Field Gradient Nuclear Magnetic Resonance
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 60, Pages: 181-184, ISSN: 0021-9568- Author Web Link
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- Citations: 19
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Journal articleSchmidt KAG, Pagnutti D, Curran MD, et al., 2015,
New Experimental Data and Reference Models for the Viscosity and Density of Squalane
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 60, Pages: 137-150, ISSN: 0021-9568- Author Web Link
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- Citations: 43
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Journal articleMcBride-Wright M, Maitland GC, Trusler JPM, 2015,
Viscosity and Density of Aqueous Solutions of Carbon Dioxide at Temperatures from (274 to 449) K and at Pressures up to 100 MPa
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 60, Pages: 171-180, ISSN: 0021-9568- Author Web Link
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- Citations: 49
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Journal articleHou S-X, Maitland GC, Trusler JPM, 2014,
Phase equilibria of (CO2 + butylbenzene) and (CO2 + butylcyclohexane) at temperatures between (323.15 and 423.15) K and at pressures up to 21 MPa
, Fluid Phase Equilibria, Vol: 387, Pages: 111-116, ISSN: 0378-3812Experimental measurements of the phase equilibria of (CO2 + butylbenzene) and (CO2 + butylcyclohexane) have been made with an analytical apparatus at temperatures of (323.15, 373.15 and 423.15) K at pressures from 2 MPa to the mixture critical pressure. These are the first results to be published for (CO2 + butylcyclohexane), while for (CO2 + butylbenzene) they are the first at pressures above 6 MPa. To model the data, we use the Peng–Robinson equation of state with Wong–Sandler mixing rules incorporating the NRTL equation. The model describes the measured bubble point curves very well at all temperatures, except close to the mixture critical points at high pressures. The dew point curves are described well only at the lowest temperature; otherwise, deviations increase in the approach to the mixture critical point.
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Journal articleLin C-W, Trusler JPM, 2014,
Speed of Sound in (Carbon Dioxide plus Propane) and Derived Sound Speed of Pure Carbon Dioxide at Temperatures between (248 and 373) K and at Pressures up to 200 MPa
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 59, Pages: 4099-4109, ISSN: 0021-9568- Author Web Link
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- Citations: 16
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Journal articleAl Ghafri SZS, Forte E, Maitland GC, et al., 2014,
Experimental and Modeling Study of the Phase Behavior of (Methane + CO2 + Water) Mixtures
, The Journal of Physical Chemistry B, Vol: 118, Pages: 14461-14478, ISSN: 1520-5207 -
Journal articleMay EF, Tay WJ, Nania M, et al., 2014,
Physical apparatus parameters and model for vibrating tube densimeters at pressures to 140 MPa and temperatures to 473 K
, Review of Scientific Instruments, Vol: 85, ISSN: 1089-7623 -
Journal articleCadogan SP, Maitland GC, Trusler JPM, 2014,
Diffusion coefficients of CO2 and N-2 in water at temperatures between 298.15 K and 423.15 K at pressures up to 45 MPa
, Journal of Chemical and Engineering Data, Vol: 59, Pages: 519-525, ISSN: 1520-5134We report measurements of the diffusion coefficients of CO2 and N2 in pure water at temperatures between (298.15 and 423.15) K and pressures between (15 and 45) MPa. The measurements were made by the Taylor dispersion method and have a standard relative uncertainty of 2.3 %. The results were found to be essentially independent of pressure over the range investigated and a simple relation, based on the Stokes–Einstein equation, is proposed to correlate the experimental data. Some experimental difficulties arising in the measurement of the diffusivities of slightly soluble acid-gas solutes such as CO2 in water are also discussed.
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Journal articleAl Ghafri SZ, Maitland GC, Trusler JPM, 2013,
Experimental and modeling study of the phase behavior of synthetic crude oil + CO2
, Fluid Phase Equilibria, Vol: 365, Pages: 20-40, ISSN: 0378-3812A full understanding of the phase behavior of CO2–hydrocarbon mixtures at reservoir conditions is essential for the proper design, construction and operation of carbon capture and storage (CCS) and enhanced oil recovery (EOR) processes. While equilibrium data for binary CO2–hydrocarbon mixtures are plentiful, equilibrium data and validated equations of state having reasonable predictive capability for multi-component CO2–hydrocarbon mixtures are limited. In this work, a new synthetic apparatus was constructed to measure the phase behavior of systems containing CO2 and multicomponent hydrocarbons at reservoir temperatures and pressures. The apparatus consisted of a thermostated variable-volume view cell driven by a computer-controlled servo motor system, and equipped with a sapphire window for visual observation. Two calibrated syringe pumps were used for quantitative fluid injection. The maximum operating pressure and temperature were 40 MPa and 473.15 K, respectively. The apparatus was validated by means of isothermal vapor–liquid equilibrium measurement on (CO2 + heptane), the results of which were found to be in good agreement with literature data.In this work, we report experimental measurements of the phase behavior and density of (CO2 + synthetic crude oil) mixtures. The ‘dead’ oil contained a total of 17 components including alkanes, branched-alkanes, cyclo-alkanes, and aromatics. Solution gas (0.81 methane + 0.13 ethane + 0.06 propane) was added to obtain live synthetic crudes with gas-oil ratios of either 58 or 160. Phase equilibrium and density measurements are reported for the ‘dead’ oil and the two ‘live’ oils under the addition of CO2. The measurements were carried out at temperatures of 298.15, 323.15, 373.15 and 423.15 K and at pressures up to 36 MPa, and included vapor–liquid, liquid–liquid and vapor–liquid–liquid equilibrium conditions. The results are qualitatively
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Journal articleCiotta F, Trusler JPM, Vesovic V, 2013,
Extended hard-sphere model for the viscosity of dense fluids
, Fluid Phase Equilibria, Vol: 363, Pages: 239-247, ISSN: 0378-3812An extended hard-sphere model is reported that may be applied to correlate and predict the viscosity of gases, liquids and supercritical fluids. The method is based on the hard-sphere model of Dymond and Assael and uses their roughness factors and molar core volumes to relate reduced viscosity to a universal function of reduced volume. The extended model behaves correctly in the limit of low densities and offers improved accuracy at high densities. The new universal reference function was determined from a large database of experimental viscosities for alkanes extending up to reduced densities of 0.84. It has been tested by correlating the viscosity of two high-viscosity liquids not used in the development of the universal function and has shown to perform satisfactorily up to reduced densities of approximately 0.9.
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Journal articleChirico RD, Frenkel M, Magee JW, et al., 2013,
Improvement of Quality in Publication of Experimental Thermophysical Property Data: Challenges, Assessment Tools, Global Implementation, and Online Support
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 58, Pages: 2699-2716, ISSN: 0021-9568- Author Web Link
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- Citations: 210
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Journal articlePeng C, Crawshaw JP, Maitland GC, et al., 2013,
The pH of CO2-saturated water at temperatures between 308 K and 423 K at pressures up to 15 MPa
, The Journal of Supercritical Fluids, Vol: 82, Pages: 129-137, ISSN: 0896-8446Abstract We report pH measurements for CO2-saturated water in the pressure range from (0.28 to 15.3) MPa and temperatures from (308.3 to 423.2) K. Commercially available pH and Ag/AgCl electrodes were used together with a high pressure equilibrium vessel operating under conditions of precisely controlled temperature and pressure. The results of the study indicate that pH decreases along an isotherm in proportion to −log10(x), where x is the mole fraction of dissolved CO2 in H2O. The expanded uncertainty of the pH measurements is 0.06 pH units with a coverage factor of 2. The reported results are in good agreement with the literature in pressure ranges up to 16 MPa at temperatures below 343 K. An empirical equation has been developed to represent the present results with an expanded uncertainty of 0.05 pH units. We also compare our results with a chemical equilibrium model and find agreement to within 0.1 pH unit.
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Journal articleTong D, Trusler JPM, Vega-Maza D, 2013,
Solubility of CO<sub>2</sub> in Aqueous Solutions of CaCl<sub>2</sub> or MgCl<sub>2</sub> and in a Synthetic Formation Brine at Temperatures up to 423 K and Pressures up to 40 MPa
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 58, Pages: 2116-2124, ISSN: 0021-9568- Author Web Link
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- Citations: 70
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Journal articleTong D, Maitland GC, Trusler MJP, et al., 2013,
Solubility of carbon dioxide in aqueous blends of 2-amino-2-methyl-1-propanol and piperazine
, Chemical Engineering Science, Vol: 101, Pages: 851-864, ISSN: 0009-2509In this work, we report new solubility data for carbon dioxide in aqueous blends of 2-amino-2-methyl-1-propanol (AMP) and piperazine (PZ). A static-analytical apparatus, validated in previous work, was employed to obtain the results at temperatures of (313.2, 333.2, 373.2, 393.2) K, and at total pressures up to 460 kPa. Two different solvent blends were studied, both having a total amine mass fraction of 30%: (25 mass% AMP+5 mass% PZ) and (20 mass% AMP+10 mass% PZ). Comparisons between these PZ activated aqueous AMP systems and 30 mass% aqueous AMP have been made in terms of their cyclic capacities under typical scrubbing conditions of 313 K in the absorber and 393 K in the stripper. The Kent–Eisenberg model was used to correlate the experimental data.
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Journal articleHou S-X, Maitland GC, Trusler JPM, 2013,
Phase equilibria of (CO<sub>2</sub> + H<sub>2</sub>O + NaCl) and (CO<sub>2</sub> + H<sub>2</sub>O + KCl): Measurements and modeling
, JOURNAL OF SUPERCRITICAL FLUIDS, Vol: 78, Pages: 78-88, ISSN: 0896-8446- Author Web Link
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- Citations: 36
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Journal articleLi X, Ross DA, Trusler JPM, et al., 2013,
Molecular Dynamics Simulations of CO<sub>2</sub> and Brine Interfacial Tension at High Temperatures and Pressures
, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 117, Pages: 5647-5652, ISSN: 1520-6106- Author Web Link
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- Citations: 68
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Journal articleForte E, Galindo A, Trusler JPM, 2013,
Experimental and molecular modelling study of the three-phase behaviour of (propane plus carbon dioxide plus water) at reservoir conditions
, JOURNAL OF SUPERCRITICAL FLUIDS, Vol: 75, Pages: 30-42, ISSN: 0896-8446- Author Web Link
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- Citations: 11
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Journal articleAl Ghafri SZ, Maitland GC, Trusler JPM, 2013,
Densities of SrCl<sub>2</sub>(aq), Na<sub>2</sub>SO<sub>4</sub>(aq), NaHCO<sub>3</sub>(aq), and Two Synthetic Reservoir Brines at Temperatures between (298 and 473) K, Pressures up to 68.5 MPa, and Molalities up to 3 mol.kg<SUP>-1</SUP>
, JOURNAL OF CHEMICAL AND ENGINEERING DATA, Vol: 58, Pages: 402-412, ISSN: 0021-9568- Author Web Link
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- Citations: 12
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Journal articleVega-Maza D, Carmen Martin M, Trusler JPM, et al., 2013,
Heat capacities and densities of the binary mixtures containing ethanol, cyclohexane or 1-hexene at high pressures
, JOURNAL OF CHEMICAL THERMODYNAMICS, Vol: 57, Pages: 550-557, ISSN: 0021-9614- Author Web Link
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- Citations: 21
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Journal articleForte E, Llovell F, Trusler JPM, et al., 2013,
Application of the statistical associating fluid theory for potentials of variable range (SAFT-VR) coupled with renormalisation-group (RG) theory to model the phase equilibria and second-derivative properties of pure fluids
, FLUID PHASE EQUILIBRIA, Vol: 337, Pages: 274-287, ISSN: 0378-3812- Author Web Link
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- Citations: 23
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Conference paperAl Ghafri S, Maitland G, Trusler JPM, 2013,
Experimental and modeling study of the phase behavior of (Synthetic Crude Oil + CO<inf>2</inf>)
, Pages: 527-529 -
Journal articleHou S-X, Maitland GC, Trusler JPM, 2013,
Measurement and modeling of the phase behavior of the (carbon dioxide + water) mixture at temperatures from 298.15 K to 448.15 K
, The Journal of Supercritical Fluids, Vol: 73, Pages: 87-96 -
Journal articleTong D, Trusler JPM, Maitland GC, et al., 2012,
Solubility of carbon dioxide in aqueous solution of monoethanolamine or 2-amino-2-methyl-1-propanol: Experimental measurements and modelling
, International Journal of Greenhouse Gas Control, Vol: 6, Pages: 37-47Despite the importance of the accurate measurement of vapour–liquid equilibria (VLE) data, the reported values, even for well-studied systems such as MEA–H2O–CO2, are scattered. This work centres on the development of an experimental method to measure accurately the VLE of various aqueous amine systems. A static-analytic type of VLE apparatus has been constructed and employed to measure the VLE of CO2 in aqueous monoethanolamine and 2-amino-2-methyl-1-propanol. Gas chromatography was used to analyse the liquid phase compositions. The setup has been validated against literature data for 30 mass% MEA (monoethanolamine) at T = 313 and 393 K and was shown to be capable of generating reliable and repeatable data. New measurements for 30 mass% aqueous AMP (2-amino-2-methyl-1-propanol) solutions are also presented at temperatures between 313 and 393 K and a total pressure range of 23–983 kPa. A quasi-chemical model has been employed to interpret the experimental data for the MEA–H2O–CO2 and AMP–H2O–CO2 systems. The average absolute deviation (ΔAAD) between model prediction and experimental data is within 7%.
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Journal articleRahman MQ, Chuah K-S, Macdonald ECA, et al., 2012,
The effect of pH, dilution, and temperature on the viscosity of ocular lubricants-shift in rheological parameters and potential clinical significance
, EYE, Vol: 26, Pages: 1579-1584, ISSN: 0950-222X- Author Web Link
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- Citations: 31
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