1
|
Zhao R, Wang J, Xu H, Wang J, Cui Y, Yao Q, Xu S, Liu J. Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods. J Chromatogr A 2024; 1735:465346. [PMID: 39243587 DOI: 10.1016/j.chroma.2024.465346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 09/01/2024] [Accepted: 09/03/2024] [Indexed: 09/09/2024]
Abstract
The Soret effect is a significant factor in various scenarios, with thermodiffusion in binary systems serving as a common method for the study. Most research focuses rarely on the distribution characteristics of components in diffusion systems; and Soret coefficients in the porous media could not be obtained by typical methods based on the thermodiffusion column, which are particularly important in the field of oil and gas development. Moreover, experiments on ground conditions have struggled to determine the Soret coefficient accurately due to the convective effect caused by gravity differentiation. The thermodiffusion behavior of n-pentane (C5) and n-heptane (C7) binary mixtures in both bulk and porous media conditions have been investigated, aiming to provide corrected coefficients that mitigate the influence of gravity using theoretical derivation. A new method was proposed to calculate the Soret coefficients in this work by establishing a model based on gas chromatography technology. Dynamic variation of component concentration along the path was studied, and the corresponding Soret coefficients were calculated and analyzed in parallel. The results indicate that the concentration and temperature exhibit a logarithmic relationship with the distance from the heat source. The Soret coefficient values obtained from measurements in porous media are closer to the theoretically corrected values, which do not account for gravity effects. Additionally, as the permeability decreases, the counteracting effect of porous media on convection becomes more pronounced. Therefore, it presents a novel method for accurately measuring the Soret coefficient that ignores convection to some extent.
Collapse
Affiliation(s)
- Renbao Zhao
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China.
| | - Jiaying Wang
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
| | - Haotian Xu
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
| | - Jinming Wang
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China; Offshore Oil Engineering Co, Ltd, Tianjin 300461, China
| | - Yifang Cui
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
| | - Quan Yao
- Petroleum Institute, China University of Petroleum (Beijing) at Karamay, Karamay 834000, China
| | - Shenghua Xu
- Key Laboratory of Microgravity, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiyang Liu
- State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
| |
Collapse
|
2
|
Chen F, Nasrabadi H. Molecular Dynamics Simulation of the Thermal Diffusion Effect in n-Alkane Binary Mixtures. J Phys Chem B 2022; 126:10164-10171. [DOI: 10.1021/acs.jpcb.2c05121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Fangxuan Chen
- Texas A&M University, 400 Bizzell Street, College Station, Texas77843, United States
| | - Hadi Nasrabadi
- Texas A&M University, 400 Bizzell Street, College Station, Texas77843, United States
| |
Collapse
|
3
|
Diaz-Marquez A, Stirnemann G. Mass effects for thermodiffusion in dilute aqueous solutions. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2022; 45:37. [PMID: 35445893 DOI: 10.1140/epje/s10189-022-00193-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Thermodiffusion is the phenomenon by which molecules in a mixture present concentration gradients in response to an imposed temperature gradient. Despite decades of investigations, this effect remains poorly understood at a molecular level. A common, phenomenological approach is to individuate the molecular factors that influence the Soret coefficient, the parameter that quantifies the resulting concentration-gradient. Experimental studies, often performed on organic mixtures, as well as simulations of model particle systems have evidenced that the difference in masses between the mixture components has an important effect on the amplitude of the Soret coefficient. Here, we use molecular dynamics simulations of a thermophoretic setting to investigate the mass dependence of the Soret coefficient in dilute aqueous solutions. An advantage of simulation approaches is that they are not limited in the range of explored molecular masses, which is often limited to isotopic substitutions in the experiments. Our simulations reveal that the mass dependence of the Soret coefficient in these solutions is in agreement with previous experimental and simulation work on molecular-size systems. In particular, it is sensitive to the relative mass difference between the solute and the solvent, but not to their absolute mass. Adjusting the mass of the solvent and of the solute can turn a thermophobic solution into a thermophilic one, where solute accumulation is reversed. This demonstrates that the mass effect can indeed compensate for the other contributions to the Soret coefficient. Finally, we find that changing the molecular moments of inertia has a much more limited impact as compared to a change in the total molecular mass.
Collapse
Affiliation(s)
- Alejandro Diaz-Marquez
- CNRS Laboratoire de Biochimie Théorique, Institut de Biologie Physico-Chimique, PSL University, Université de Paris, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Guillaume Stirnemann
- CNRS Laboratoire de Biochimie Théorique, Institut de Biologie Physico-Chimique, PSL University, Université de Paris, 13 rue Pierre et Marie Curie, 75005, Paris, France.
| |
Collapse
|
4
|
Jayapaul J, Komulainen S, Zhivonitko VV, Mareš J, Giri C, Rissanen K, Lantto P, Telkki VV, Schröder L. Hyper-CEST NMR of metal organic polyhedral cages reveals hidden diastereomers with diverse guest exchange kinetics. Nat Commun 2022; 13:1708. [PMID: 35361759 PMCID: PMC8971460 DOI: 10.1038/s41467-022-29249-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 03/03/2022] [Indexed: 01/04/2023] Open
Abstract
Guest capture and release are important properties of self-assembling nanostructures. Over time, a significant fraction of guests might engage in short-lived states with different symmetry and stereoselectivity and transit frequently between multiple environments, thereby escaping common spectroscopy techniques. Here, we investigate the cavity of an iron-based metal organic polyhedron (Fe-MOP) using spin-hyperpolarized 129Xe Chemical Exchange Saturation Transfer (hyper-CEST) NMR. We report strong signals unknown from previous studies that persist under different perturbations. On-the-fly delivery of hyperpolarized gas yields CEST signatures that reflect different Xe exchange kinetics from multiple environments. Dilute pools with ~ 104-fold lower spin numbers than reported for directly detected hyperpolarized nuclei are readily detected due to efficient guest turnover. The system is further probed by instantaneous and medium timescale perturbations. Computational modeling indicates that these signals originate likely from Xe bound to three Fe-MOP diastereomers (T, C3, S4). The symmetry thus induces steric effects with aperture size changes that tunes selective spin manipulation as it is employed in CEST MRI agents and, potentially, impacts other processes occurring on the millisecond time scale.
Collapse
Affiliation(s)
- Jabadurai Jayapaul
- Molecular Imaging, Department of Structural Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125, Berlin, Germany
- Division of Translational Molecular Imaging, Deutsches Krebsforschungszentrum (DKFZ), 69120, Heidelberg, Germany
| | | | | | - Jiří Mareš
- NMR Research Unit, University of Oulu, 90014, Oulu, Finland
- Research Unit of Medical Imaging, Physics and Technology (MIPT), University of Oulu, 90014, Oulu, Finland
| | - Chandan Giri
- University of Jyvaskyla, Department of Chemistry, 40014, Jyväskylä, Finland
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, 40014, Jyväskylä, Finland
| | - Perttu Lantto
- NMR Research Unit, University of Oulu, 90014, Oulu, Finland.
| | | | - Leif Schröder
- Molecular Imaging, Department of Structural Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125, Berlin, Germany.
- Division of Translational Molecular Imaging, Deutsches Krebsforschungszentrum (DKFZ), 69120, Heidelberg, Germany.
| |
Collapse
|
5
|
Zhong J, Zhao R, Ouyang W, Xu S. Molecular Dynamics Simulation of the Soret Effect on Two Binary Liquid Solutions with Equimolar n-Alkane Mixtures. ACS OMEGA 2022; 7:518-527. [PMID: 35036720 PMCID: PMC8756439 DOI: 10.1021/acsomega.1c04926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Molecular dynamics is employed to simulate the Soret effect on two binary liquid solutions with equimolar mixtures: normal pentane (n-pentane, nC-5) and normal heptane (n-heptane, nC-7) molecules plus normal decane (n-decane, nC-10) and normal pentane molecules. Moreover, two coarse-grained force field (the CG-FF) potentials, which may depict inter-/intramolecular interactions fairly well among n-alkane molecules, are developed to fulfill such investigations. In addition, thermal diffusion for the mass fraction of each of these n-alkane molecules is simulated under an effect of a weak thermal gradient (temperature difference) exerting on solution systems from their hot to cold boundary sides. Finally, quantities of the Soret coefficient (SC) for two binary solutions are calculated by means of the developed CG-FF potentials, so as to improve the calculation rationality. As a result, first, it is found that molecules with light molar masses will migrate toward the hot boundary side, while those with heavy molar masses will migrate toward the cold boundary one ; second, the SC quantities indicate that they match relevant experimental determinations fairly well, i.e., trends of these SC quantities show inverse proportionality to the thermal gradient on the systems.
Collapse
Affiliation(s)
- Jun Zhong
- College
of Materials Engineering, North China Institute
of Aerospace Engineering, Langfang 065000, P.R. China
| | - Renbao Zhao
- College
of Petroleum Engineering, China University
of Petroleum Beijing, Beijing 102249, P.R. China
| | - Wenze Ouyang
- Institute
of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Shenghua Xu
- Institute
of Mechanics, Chinese Academy of Sciences, Beijing 100190, P.R. China
| |
Collapse
|
6
|
Xiaoyu Chen, Liang R, Wang Y, Xia Z, Wu L, Liang Y, cui G. Boundary-Driven Non-Equilibrium Molecular Dynamics Calculation of the Soret Coefficient in n-Hexane/n-Dodecane Mixtures. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121030180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Pur B, Schock F, Köhler W, Morozov KI. An Unreasonable Universality of the Thermophoretic Velocity. J Phys Chem Lett 2020; 11:4498-4502. [PMID: 32423214 DOI: 10.1021/acs.jpclett.0c01303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Thermophoresis is the migration of dispersed molecules or particles in an inhomogeneous temperature field. It has been associated with various nonequilibrium phenomena ranging from stratified oil reservoirs to prebiotic evolution and the origin of life. The thermophoretic velocity is difficult to predict and appears almost random. We show that, in the case of strongly asymmetric mixtures with high molecular mass ratios of the solute to the solvent, it unexpectedly assumes a universal value once the trivial influence of the viscosity has been factored out. This asymptotic behavior is surprisingly universal and a general property of many highly asymmetric molecular mixtures ranging from organic molecules in n-alkanes to dilute solutions of high polymers. A quantitative explanation is provided on the basis of the asymmetric limit of the pseudoisotopic Soret effect.
Collapse
Affiliation(s)
- B Pur
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - F Schock
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - W Köhler
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - K I Morozov
- Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| |
Collapse
|
8
|
Pur B, Köhler W, Morozov KI. The Soret effect of halobenzenes in n-alkanes: The pseudo-isotope effect and thermophobicities. J Chem Phys 2020; 152:054501. [PMID: 32035438 DOI: 10.1063/1.5141055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have measured the Soret coefficients of three halobenzenes-fluoro-, chloro-, and bromobenzene-in n-alkanes ranging from hexane to hexadecane over the entire composition range at a temperature of 25 °C. With these new results, two semi-empirical models for the Soret effect, which are based on the pseudo-isotope effect and on the single-component thermophobicities, could significantly be expanded and put on a broader common experimental basis. In particular, for the longer alkanes, above decane, a simplified version of the pseudo-isotope effect yields a good description. In the dilute limit, the agreement of the chemical contributions to the Soret coefficient is perfect, but there are some unexplained systematic deviations at finite concentrations. We have used these Soret coefficients, together with the measurements of 1-bromonaphthalene in the n-alkanes, to expand the database for the thermophobicities of equimolar binary mixtures. Due to a vanishing mixing term in symmetric mixtures, the heats of transport computed from the Soret coefficients can be considered as differences in additive single component properties, the thermophobicities. This allows an ordering of the substances according to these numbers. In a binary mixture, the component with the higher thermophobicity migrates toward the cold side. With the new measurements, the database now contains 24 compounds with 107 out of 276 possible binary mixtures measured.
Collapse
Affiliation(s)
- B Pur
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - W Köhler
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - K I Morozov
- Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel
| |
Collapse
|
9
|
Furtado FA, Firoozabadi A. Fickian and thermal diffusion coefficients of binary mixtures of isobutylbenzene and n-alkanes at different concentrations from the optical beam deflection technique. J Chem Phys 2019; 151:024202. [DOI: 10.1063/1.5082963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Filipe Arantes Furtado
- Chemical Engineering Department, Yale University, 9 Hillhouse Avenue, New Haven, CT, 06511, United States
- Chemical Engineering Program - PEQ/COPPE, Federal University of Rio de Janeiro - UFRJ, Cidade Universitária, Rio de Janeiro - RJ, Brazil
| | - Abbas Firoozabadi
- Chemical Engineering Department, Yale University, 9 Hillhouse Avenue, New Haven, CT, 06511, United States
- Reservoir Engineering Research Institute, Palo Alto, California 94301, USA
| |
Collapse
|
10
|
Hoang H, Nguyen P, Pujol M, Galliero G. Elemental and isotopic fractionation of noble gases in gas and oil under reservoir conditions: Impact of thermodiffusion ⋆. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2019; 42:61. [PMID: 31093783 DOI: 10.1140/epje/i2019-11823-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
Noble gases, and the way they fractionate, is a promising approach to better constrain origin, migration and initial state distributions of fluids in gas and oil reservoirs. Thermodiffusion, is one of the phenomena that may lead to isotope and elemental fractionation of noble gases. However, this effect, assumed to be small, has not been quantified, nor measured, in oil and gas under reservoir conditions. Thus, in this work, molecular dynamics simulations have been performed to compute the thermal diffusion factors of noble gases, in a dense gas (methane) and in an oil (n-hexane) under high pressures. Interestingly, it has been found that thermal diffusion factors, associated to both isotopic (36Ar, 40Ar) and elemental fractionations of noble gases (4He, 20Ne, 40Ar, 84Kr and 131Xe) in gas and oil, could be expressed as linear functions of the reduced masses. Regarding the amplitude of the phenomena, it has been found that, in a stationary 1D oil or gas fluid column, thermodiffusion due to a typical geothermal gradient has an impact on noble gas isotopic and elemental fractionation which is of the same order of magnitude than gravity segregation, but opposite in sign. In addition, the relative impact of thermodiffusion on isotopic and elemental fractionations depends on the fluid type which is another interesting feature. Thus, these first numerical results on isotopic and elemental fractionation of noble gases by thermodiffusion in simple pure gas and oil emphasize their interest as natural tracers that could be used to improve the pre-exploitation description of oil and gas reservoirs.
Collapse
Affiliation(s)
- Hai Hoang
- Institute of Fundamental and Applied Sciences, Duy Tan University, 10C Tran Nhat Duat Street, District 1, 700000, Ho Chi Minh City, Vietnam
| | - Phuc Nguyen
- Ho Chi Minh University of Science, 227 Nguyen Van Cu, District 5, 7000, Ho Chi Minh City, Vietnam
| | - Magali Pujol
- TOTAL S.A., CSTJF, Avenue Larribau, 64018, Pau, France
| | - Guillaume Galliero
- Laboratoire des Fluides Complexes et leurs Réservoirs (UMR-5150 with CNRS, and TOTAL), Université de Pau et des Pays de l'Adour, BP 1155, F-64013, Pau Cedex, France.
| |
Collapse
|
11
|
Antoun S, Saghir MZ, Srinivasan S. An improved molecular dynamics algorithm to study thermodiffusion in binary hydrocarbon mixtures. J Chem Phys 2018; 148:104507. [DOI: 10.1063/1.5016342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Sylvie Antoun
- Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
| | - M. Ziad Saghir
- Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
| | - Seshasai Srinivasan
- Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main St. West, Hamilton, Ontario L8S 4L8, Canada
- Department of Mechanical Engineering, McMaster University, Hamilton, Ontario L8S 4L8, Canada
| |
Collapse
|
12
|
Galliero G, Bataller H, Bazile JP, Diaz J, Croccolo F, Hoang H, Vermorel R, Artola PA, Rousseau B, Vesovic V, Bou-Ali MM, Ortiz de Zárate JM, Xu S, Zhang K, Montel F, Verga A, Minster O. Thermodiffusion in multicomponent n-alkane mixtures. NPJ Microgravity 2017; 3:20. [PMID: 28879228 PMCID: PMC5554197 DOI: 10.1038/s41526-017-0026-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 07/08/2017] [Accepted: 07/12/2017] [Indexed: 11/08/2022] Open
Abstract
Compositional grading within a mixture has a strong impact on the evaluation of the pre-exploitation distribution of hydrocarbons in underground layers and sediments. Thermodiffusion, which leads to a partial diffusive separation of species in a mixture due to the geothermal gradient, is thought to play an important role in determining the distribution of species in a reservoir. However, despite recent progress, thermodiffusion is still difficult to measure and model in multicomponent mixtures. In this work, we report on experimental investigations of the thermodiffusion of multicomponent n-alkane mixtures at pressure above 30 MPa. The experiments have been conducted in space onboard the Shi Jian 10 spacecraft so as to isolate the studied phenomena from convection. For the two exploitable cells, containing a ternary liquid mixture and a condensate gas, measurements have shown that the lightest and heaviest species had a tendency to migrate, relatively to the rest of the species, to the hot and cold region, respectively. These trends have been confirmed by molecular dynamics simulations. The measured condensate gas data have been used to quantify the influence of thermodiffusion on the initial fluid distribution of an idealised one dimension reservoir. The results obtained indicate that thermodiffusion tends to noticeably counteract the influence of gravitational segregation on the vertical distribution of species, which could result in an unstable fluid column. This confirms that, in oil and gas reservoirs, the availability of thermodiffusion data for multicomponent mixtures is crucial for a correct evaluation of the initial state fluid distribution.
Collapse
Affiliation(s)
- Guillaume Galliero
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Henri Bataller
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Jean-Patrick Bazile
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Joseph Diaz
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Fabrizio Croccolo
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
- Centre National d’Etudes Spatiales (CNES) 2, Place Maurice Quentin, 75001 Paris, France
| | - Hai Hoang
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Romain Vermorel
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, E2S, UMR5150, Univ Pau & Pays Adour/CNRS/TOTAL, 64000 Pau, France
| | - Pierre-Arnaud Artola
- Laboratoire de Chimie-Physique, UMR 8000 CNRS, Université Paris-Sud, Orsay, France
| | - Bernard Rousseau
- Laboratoire de Chimie-Physique, UMR 8000 CNRS, Université Paris-Sud, Orsay, France
| | - Velisa Vesovic
- Department of Earth Science and Engineering, Imperial College London, London, UK
| | - M. Mounir Bou-Ali
- MGEP Mondragon GoiEskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Mondragon, Spain
| | | | - Shenghua Xu
- Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Science, Beijing, China
| | - Ke Zhang
- State Key Laboratory of Enhanced Oil Recovery (Research Institute of Petroleum Exploration & Development), CNPC, Beijing, China
| | | | - Antonio Verga
- European Space Agency, ESTEC, Noordwijk, The Netherlands
| | | |
Collapse
|
13
|
Larrañaga M, Bou-Ali MM, Lapeira E, Lizarraga I, Santamaría C. Thermodiffusion, molecular diffusion and Soret coefficients of aromatic+n-alkane binary mixtures. J Chem Phys 2016; 145:134503. [PMID: 27782414 DOI: 10.1063/1.4964298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In the present work, we have measured the thermodiffusion coefficient of 51 binary liquid mixtures at 25 oC. These mixtures correspond to the series of the aromatics toluene and 1-methylnaphthalene with n-alkanes nCi (i = 6, 8, 10, 12, and 14) at different mass fractions in the whole range. For that, we have used the thermogravitational technique. It is shown that the thermodiffusion coefficient is a linear function of the mass fraction in all the mixtures. Extrapolating the lines, we obtain the thermodiffusion coefficient in dilute solutions of n-alkanes for both toluene and 1-methylnaphthalene. These limiting values show a linear dependence with the inverse of the product of the molecular weights. In addition, we have measured the molecular diffusion coefficient of all the mixtures at 0.5 of mass fraction and at 25 oC, by the sliding symmetric tubes technique. It is observed that the product of this coefficient with the viscosity at the same concentrations takes a constant value for each of the series considered. Finally, we have also determined the Soret coefficient of the equimass mixtures by the combination of the measurements of thermodiffusion and molecular diffusion coefficients.
Collapse
Affiliation(s)
- Miren Larrañaga
- MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4 Apdo. 23, Mondragon 20500, Spain
| | - M Mounir Bou-Ali
- MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4 Apdo. 23, Mondragon 20500, Spain
| | - Estela Lapeira
- MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4 Apdo. 23, Mondragon 20500, Spain
| | - Ion Lizarraga
- MGEP Mondragon Goi Eskola Politeknikoa, Mechanical and Industrial Manufacturing Department, Loramendi 4 Apdo. 23, Mondragon 20500, Spain
| | - Carlos Santamaría
- Department of Applied Physics II, University of Basque Country, Apdo. 644, Bilbao 48080, Spain
| |
Collapse
|
14
|
Hartmann S, Wittko G, Schock F, Groß W, Lindner F, Köhler W, Morozov KI. Thermophobicity of liquids: Heats of transport in mixtures as pure component properties—The case of arbitrary concentration. J Chem Phys 2014; 141:134503. [DOI: 10.1063/1.4896776] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Hartmann
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - G. Wittko
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - F. Schock
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - W. Groß
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - F. Lindner
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - W. Köhler
- Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany
| | - K. I. Morozov
- Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
| |
Collapse
|
15
|
Rossella F, Rose HM, Witte C, Jayapaul J, Schröder L. Design and Characterization of Two Bifunctional Cryptophane A-Based Host Molecules for Xenon Magnetic Resonance Imaging Applications. Chempluschem 2014. [DOI: 10.1002/cplu.201402179] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|