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Regueira T, Glykioti ML, Kottaki N, Stenby EH, Yan W. Density, compressibility and phase equilibrium of high pressure-high temperature reservoir fluids up to 473 K and 140 MPa. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2020.104781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sandoval DR, Michelsen ML, Yan W, Stenby EH. VT-Based Phase Envelope and Flash Calculations in the Presence of Capillary Pressure. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b05976] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu X, Feilberg KL, Yan W, Stenby EH, Thormann E. Interactions between apolar, basic and acidic model oils and a calcite surface. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1523012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xiaoyan Liu
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, Denmark
- Centre for Olie og Gas - Technical University of Denmark, Kongens Lyngby, Denmark
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, China
| | - Karen L. Feilberg
- Centre for Olie og Gas - Technical University of Denmark, Kongens Lyngby, Denmark
| | - Wei Yan
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Esben Thormann
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, Denmark
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Paterson D, Yan W, Michelsen ML, Stenby EH. Multiphase isenthalpic flash: General approach and its adaptation to thermal recovery of heavy oil. AIChE J 2018. [DOI: 10.1002/aic.16371] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Duncan Paterson
- Center for Energy Resources Engineering; Technical University of Denmark; Lyngby Denmark
| | - Wei Yan
- Center for Energy Resources Engineering; Technical University of Denmark; Lyngby Denmark
| | - Michael L. Michelsen
- Center for Energy Resources Engineering; Technical University of Denmark; Lyngby Denmark
| | - Erling H. Stenby
- Center for Energy Resources Engineering; Technical University of Denmark; Lyngby Denmark
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Affiliation(s)
- Diego R. Sandoval
- Center for Energy Resources Engineering (CERE), Department of Chemistry, Technical University of Denmark, Lyngby 2800, Denmark
| | - Wei Yan
- Center for Energy Resources Engineering (CERE), Department of Chemistry, Technical University of Denmark, Lyngby 2800, Denmark
| | - Michael L. Michelsen
- Center for Energy Resources Engineering (CERE), Department of Chemical Engineering, Technical University of Denmark, Lyngby 2800, Denmark
| | - Erling H. Stenby
- Center for Energy Resources Engineering (CERE), Department of Chemistry, Technical University of Denmark, Lyngby 2800, Denmark
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Affiliation(s)
- Christos Tsanas
- Center for Energy Resources Engineering
(CERE), Department of Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Erling H. Stenby
- Center for Energy Resources Engineering
(CERE), Department of Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Wei Yan
- Center for Energy Resources Engineering
(CERE), Department of Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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Liu X, Feilberg KL, Yan W, Stenby EH, Thormann E. Electrical Double-Layer and Ion Bridging Forces between Symmetric and Asymmetric Charged Surfaces in the Presence of Mono- and Divalent Ions. Langmuir 2017; 33:4426-4434. [PMID: 28430450 DOI: 10.1021/acs.langmuir.7b00450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An atomic force microscope, employing the colloidal probe technique, was used to study the interactions between six different combinations of silane-functionalized silica surfaces in NaCl and CaCl2 solutions. The surfaces consisted of monolayers of the apolar trimethoxy(octyl)silane, the positively charged (3-aminopropyl)trimethoxysilane, and the negatively charged (3-mercaptopropyl)trimethoxysilane. The interactions between the three symmetric systems, as well as between the three asymmetric combinations of surfaces, were measured and compared to calculated electrical double-layer forces. The results demonstrated that the long-range interactions between the surfaces in all cases were dominated by double-layer forces, while short-range interactions, including adhesion, were dominated by ion bridging forces in the cases where both interaction surfaces favored adsorption of calcium ions. The study thus also demonstrates how surface force studies in mono- and divalent salt solutions can be used as an analytical tool for probing specific functional groups on heterogeneous surfaces.
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Affiliation(s)
- Xiaoyan Liu
- Department of Chemistry and ‡Centre for Oil and Gas, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Karen L Feilberg
- Department of Chemistry and ‡Centre for Oil and Gas, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Wei Yan
- Department of Chemistry and ‡Centre for Oil and Gas, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Erling H Stenby
- Department of Chemistry and ‡Centre for Oil and Gas, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Esben Thormann
- Department of Chemistry and ‡Centre for Oil and Gas, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
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Sandoval DR, Yan W, Michelsen ML, Stenby EH. The Phase Envelope of Multicomponent Mixtures in the Presence of a Capillary Pressure Difference. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00972] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Diego R. Sandoval
- Center
for Energy Resources Engineering, Department of Chemistry, Technical University of Denmark, DK 2800, Kgs. Lyngby, Denmark
| | - Wei Yan
- Center
for Energy Resources Engineering, Department of Chemistry, Technical University of Denmark, DK 2800, Kgs. Lyngby, Denmark
| | - Michael L. Michelsen
- Center
for Energy Resources Engineering, Department of Chemical Engineering, Technical University of Denmark, DK 2800, Kgs. Lyngby, Denmark
| | - Erling H. Stenby
- Center
for Energy Resources Engineering, Department of Chemistry, Technical University of Denmark, DK 2800, Kgs. Lyngby, Denmark
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Affiliation(s)
- Wei Yan
- Center
for Energy Resources Engineering (CERE), Department of Chemistry, Technical University of Denmark (DTU), DK 2800, Kgs. Lyngby, Denmark
| | - Michael L. Michelsen
- Center
for Energy Resources Engineering (CERE), Department of Chemical Engineering, Technical University of Denmark (DTU), DK 2800, Kgs. Lyngby, Denmark
| | - Erling H. Stenby
- Center
for Energy Resources Engineering (CERE), Department of Chemistry, Technical University of Denmark (DTU), DK 2800, Kgs. Lyngby, Denmark
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Fritt-Rasmussen J, Ascanius BE, Brandvik PJ, Villumsen A, Stenby EH. Composition of in situ burn residue as a function of weathering conditions. Mar Pollut Bull 2013; 67:75-81. [PMID: 23245458 DOI: 10.1016/j.marpolbul.2012.11.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/12/2012] [Accepted: 11/17/2012] [Indexed: 06/01/2023]
Abstract
Troll B crude oil was weathered under Arctic conditions with different ice coverage: open water, 50% ice and 90% ice. Samples (100 mL) were taken during the experiment and tested for ignitability in a burning cell. From each burning a residue sample was taken for analysis. The burning process removed the light compounds eluting before C13. No effect from the prior weathering time or the different ice coverage was seen in the burn residue composition. The content of selected Poly Aromatic Hydrocarbons (PAHs) was determined and it was noted that the concentration of PAHs with more than 4 rings were increased. The source origin of the PAHs was investigated by use of relative ratios of PAH isomers and indicated that some formation of PAHs was additionally taking place during burning.
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Affiliation(s)
- Janne Fritt-Rasmussen
- Arctic Technology Centre, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
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Sandersen SB, Stenby EH, von Solms N. The effect of pressure on the phase behavior of surfactant systems: An experimental study. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.09.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Darde V, van Well WJM, Stenby EH, Thomsen K. Modeling of Carbon Dioxide Absorption by Aqueous Ammonia Solutions Using the Extended UNIQUAC Model. Ind Eng Chem Res 2010. [DOI: 10.1021/ie1009519] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Victor Darde
- Center for Energy Resources Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark, and Chemical Engineering, DONG Energy Power, Kraftværksvej 53, 7000 Fredericia, Denmark
| | - Willy J. M. van Well
- Center for Energy Resources Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark, and Chemical Engineering, DONG Energy Power, Kraftværksvej 53, 7000 Fredericia, Denmark
| | - Erling H. Stenby
- Center for Energy Resources Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark, and Chemical Engineering, DONG Energy Power, Kraftværksvej 53, 7000 Fredericia, Denmark
| | - Kaj Thomsen
- Center for Energy Resources Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark, and Chemical Engineering, DONG Energy Power, Kraftværksvej 53, 7000 Fredericia, Denmark
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Nielsen SM, Shapiro AA, Michelsen ML, Stenby EH. 1D Simulations for Microbial Enhanced Oil Recovery with Metabolite Partitioning. Transp Porous Media 2010. [DOI: 10.1007/s11242-010-9592-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Affiliation(s)
- Leila Faramarzi
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Kaj Thomsen
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Erling H. Stenby
- Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
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Tsivintzelis I, Kontogeorgis GM, Michelsen ML, Stenby EH. Modeling phase equilibria for acid gas mixtures using the CPA equation of state. I. Mixtures with H2S. AIChE J 2010. [DOI: 10.1002/aic.12207] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Eenschooten C, Guillaumie F, Kontogeorgis GM, Stenby EH, Schwach-Abdellaoui K. Preparation and structural characterisation of novel and versatile amphiphilic octenyl succinic anhydride–modified hyaluronic acid derivatives. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.09.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lottes F, Arlt W, Minceva M, Stenby EH. Hydrodynamic impact of particle shape in slurry packed liquid chromatography columns. J Chromatogr A 2009; 1216:5687-95. [DOI: 10.1016/j.chroma.2009.05.090] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 05/26/2009] [Accepted: 05/28/2009] [Indexed: 11/25/2022]
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Affiliation(s)
- Philip L. Fosbøl
- Technical University of Denmark, DTU Chemical Engineering, IVC-SEP, DK-2800 Kongens Lyngby, Denmark
| | - Kaj Thomsen
- Technical University of Denmark, DTU Chemical Engineering, IVC-SEP, DK-2800 Kongens Lyngby, Denmark
| | - Erling H. Stenby
- Technical University of Denmark, DTU Chemical Engineering, IVC-SEP, DK-2800 Kongens Lyngby, Denmark
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Fosbøl PL, Thomsen K, Stenby EH. Solubility Measurements in the Mixed Solvent Electrolyte System Na2CO3−NaHCO3−Monoethylene Glycol−Water. Ind Eng Chem Res 2009. [DOI: 10.1021/ie8011648] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philip L. Fosbøl
- IVC-SEP, Department of Chemical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Kaj Thomsen
- IVC-SEP, Department of Chemical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Erling H. Stenby
- IVC-SEP, Department of Chemical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
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Andersen N, Johansen KS, Michelsen M, Stenby EH, Krogh KB, Olsson L. Hydrolysis of cellulose using mono-component enzymes shows synergy during hydrolysis of phosphoric acid swollen cellulose (PASC), but competition on Avicel. Enzyme Microb Technol 2008. [DOI: 10.1016/j.enzmictec.2007.11.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gabrielsen J, Svendsen HF, Michelsen ML, Stenby EH, Kontogeorgis GM. Experimental validation of a rate-based model for CO2 capture using an AMP solution. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2007.01.034] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Berg RW, Brunsgaard Hansen S, Shapiro AA, Stenby EH. Diffusion measurements in binary liquid mixtures by Raman spectroscopy. Appl Spectrosc 2007; 61:367-73. [PMID: 17456254 DOI: 10.1366/000370207780466316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
It is shown that Raman spectroscopy allows determination of the molar fractions in mixtures subjected to molecular diffusion. Spectra of three binary systems, benzene/n-hexane, benzene/cyclohexane, and benzene/acetone, were obtained during vertical (exchange) diffusion at several different heights (z) as a function of time. A procedure to determine time-dependent concentration profiles and diffusion coefficients is described in detail for one system, and results are given for the two other cases. For the system benzene/cyclohexane, much lower diffusion coefficients than reported in the literature were found, even in a thermostatically controlled diffusion cell, recording spectra through circulating water. For the system benzene/acetone, the determined diffusion coefficients were in good agreement with the literature data. The limitations of the Raman method are discussed, and it is concluded that many more systems ought to be studied. It is pointed out that diffusion profiles can be obtained in ternary and higher systems, where proper measurements are almost nonexistent.
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Affiliation(s)
- Rolf W Berg
- Department of Chemistry, Kemitorvet 207, Technical University of Denmark, Lyngby, DK-2800, Denmark.
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Kontogeorgis GM, Michelsen ML, Folas GK, Derawi S, von Solms N, Stenby EH. Ten Years with the CPA (Cubic-Plus-Association) Equation of State. Part 1. Pure Compounds and Self-Associating Systems. Ind Eng Chem Res 2006. [DOI: 10.1021/ie051305v] [Citation(s) in RCA: 310] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios K. Folas
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Samer Derawi
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Nicolas von Solms
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Kontogeorgis GM, Michelsen ML, Folas GK, Derawi S, von Solms N, Stenby EH. Ten Years with the CPA (Cubic-Plus-Association) Equation of State. Part 2. Cross-Associating and Multicomponent Systems. Ind Eng Chem Res 2006. [DOI: 10.1021/ie051306n] [Citation(s) in RCA: 192] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios K. Folas
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Samer Derawi
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Nicolas von Solms
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Folas GK, Kontogeorgis GM, Michelsen ML, Stenby EH. Application of the Cubic-Plus-Association Equation of State to Mixtures with Polar Chemicals and High Pressures. Ind Eng Chem Res 2006. [DOI: 10.1021/ie0509241] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Georgios K. Folas
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK-2800, Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK-2800, Lyngby, Denmark
| | - Michael L. Michelsen
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK-2800, Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK-2800, Lyngby, Denmark
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Folas GK, Kontogeorgis GM, Michelsen ML, Stenby EH. Application of the Cubic-Plus-Association (CPA) Equation of State to Complex Mixtures with Aromatic Hydrocarbons. Ind Eng Chem Res 2005. [DOI: 10.1021/ie050976q] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Georgios K. Folas
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK - 2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK - 2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK - 2800 Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC-SEP), Technical University of Denmark, DK - 2800 Lyngby, Denmark
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Broholm MM, Christophersen M, Maier U, Stenby EH, Höhener P, Kjeldsen P. Compositional evolution of the emplaced fuel source in the vadose zone field experiment at Airbase Verløse, Denmark. Environ Sci Technol 2005; 39:8251-63. [PMID: 16294861 DOI: 10.1021/es048557s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A field experiment was performed in a sandy vadose zone, studying the fate of an emplaced fuel-NAPL source, composed of 13 hydrocarbons and a tracer. The UNIFAC model was used to testthe nonideal behavior of the source, and the numerical model MIN3P was used for assessing the effect of biodegradation on source evolution. The diffusive loss to the surrounding vadose zone and the atmosphere created temporary gradients in mole fractions of the individual compounds within the source NAPL. The evolution of the source composition corresponded in general with expectations based on Raoult's Law, with the exception thatthe mole fractions of aromatic compounds in the source NAPL decreased faster than fractions of aliphatic compounds of similar volatility. Calculation of activity coefficients (y) using the UNIFAC model implied nonideal conditions, with composition-dependent gammas different from 1. Positive deviations were calculated for the aromatic compounds. The effect of biodegradation on source depletion, evaluated by numerical modeling, was greater for the aromatic as compared to the aliphatic compounds. Hence, the faster depletion of the aromatic relative to aliphatic compounds of similar volatility is both a result of the nonideality of the mixture and a result of partitioning and biodegradation in the pore-water. Vapor concentrations of the compounds in the source were in reasonable agreement with predictions based on the modified Raoult's Law with the UNIFAC predicted gammas and the NAPL composition for the most volatile compounds. For the less volatile compounds, the measured vapor concentrations were lower than predicted with the largest deviations for the least volatile compounds. This field experiment illustrated that nonideal behavior and bioenhanced source depletion need to be considered at multicomponent NAPL spill sites.
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Affiliation(s)
- Mette M Broholm
- Institute of Environment and Resources DTU, Technical University of Denmark, Bygningstorvet B115, DTU, DK-2800 Kgs. Lyngby, Denmark.
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Cheng H, Kontogeorgis GM, Stenby EH. Correlation and Prediction of Environmental Properties of Alcohol Ethoxylate Surfactants Using the UNIFAC Method. Ind Eng Chem Res 2005. [DOI: 10.1021/ie050096b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongyuan Cheng
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Folas GK, Gabrielsen J, Michelsen ML, Stenby EH, Kontogeorgis GM. Application of the Cubic-Plus-Association (CPA) Equation of State to Cross-Associating Systems. Ind Eng Chem Res 2005. [DOI: 10.1021/ie048832j] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Georgios K. Folas
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC−SEP), Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Jostein Gabrielsen
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC−SEP), Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC−SEP), Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC−SEP), Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Department of Chemical Engineering, Centre for Phase Equilibria and Separation Processes (IVC−SEP), Technical University of Denmark, DK-2800 Lyngby, Denmark
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Affiliation(s)
- Jostein Gabrielsen
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Solms NV, Zecchin N, Rubin A, Andersen SI, Stenby EH. Direct measurement of gas solubility and diffusivity in poly(vinylidene fluoride) with a high-pressure microbalance. Eur Polym J 2005. [DOI: 10.1016/j.eurpolymj.2004.09.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Saghir MZ, Jiang CG, Derawi SO, Stenby EH, Kawaji M. Theoretical and experimental comparison of the Soret coefficient for water-methanol and water-ethanol binary mixtures. Eur Phys J E Soft Matter 2004; 15:241-247. [PMID: 15592763 DOI: 10.1140/epje/i2004-10063-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Accepted: 10/21/2004] [Indexed: 05/24/2023]
Abstract
In multicomponent mixtures, a much richer variety of phenomena can occur than in simple (single-component) fluids. Natural convection in single-component fluids is due to buoyancy forces caused by temperature gradients. In multicomponent mixtures, buoyancy forces may also be caused by concentration gradients. Because natural convection, molecular diffusion, and thermal conduction have different relaxation time scales, a wide variety of resulting convective motions and heat and mass distributions might occur. In some fluid mixtures such as water-ethanol system, for instance, ethanol diffuses much more slowly than heat, and because of this difference in time scales oscillatory convection might occur. In a multicomponent mixture, the total molar flux consists of two parts: the convective molar flux and the diffusive molar flux (resulting from the difference between the component velocity and the bulk velocity). The diffusion molar flux of a component depends, not only on its own mole fraction gradient (Fickian diffusion), but also on the gradient of all the components present in the mixture (cross-molecular diffusion). The diffusion flux depends also on the pressure gradient (pressure diffusion; the so-called gravitational effect) and temperature gradient (thermal diffusion; the so-called Soret effect). Firoozabadi's thermal diffusion model was applied to calculate the Soret coefficient, as well as the thermal diffusion coefficient and molecular diffusion coefficient for methanol-water and ethanol-water mixtures at 310.65 K temperature and 1 bar pressure with 10% water mass fraction. The results were compared with experimental data (J.K. Platten, in Proceedings of the 5th International Meeting on Thermodiffusion (IMT5), Lyngby, Aug. 2002, Philos. Mag. 83, Nos. 17-18 (2003)), as well as theoretical predictions with other models. A better agreement with the experimental data using the Firoozabadi model was achieved.
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Affiliation(s)
- M Z Saghir
- Department of Mechanical Engineering, Ryerson University, Ontario, Canada.
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Derawi SO, Kontogeorgis GM, Michelsen ML, Stenby EH. Extension of the Cubic-Plus-Association Equation of State to Glycol−Water Cross-Associating Systems. Ind Eng Chem Res 2003. [DOI: 10.1021/ie0206103] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samer O. Derawi
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Michael L. Michelsen
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Cheng H, Kontogeorgis GM, Stenby EH. Prediction of Micelle Formation for Aqueous Polyoxyethylene Alcohol Solutions with the UNIFAC Model. Ind Eng Chem Res 2001. [DOI: 10.1021/ie010072e] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongyuan Cheng
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark DK-2800 Lyngby Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark DK-2800 Lyngby Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark DK-2800 Lyngby Denmark
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Zéberg-Mikkelsen CK, Quiñones-Cisneros SE, Stenby EH. Viscosity Modeling of Light Gases at Supercritical Conditions Using the Friction Theory. Ind Eng Chem Res 2001. [DOI: 10.1021/ie000987d] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claus K. Zéberg-Mikkelsen
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Sergio E. Quiñones-Cisneros
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
| | - Erling H. Stenby
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Lyngby, Denmark
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Affiliation(s)
- Claus K. Zéberg-Mikkelsen
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Sergio E. Quiñones-Cisneros
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Erling H. Stenby
- Center for Phase Equilibria and Separation Processes (IVCSEP), Department of Chemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
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Derawi SO, Kontogeorgis GM, Stenby EH. Application of Group Contribution Models to the Calculation of the Octanol−Water Partition Coefficient. Ind Eng Chem Res 2000. [DOI: 10.1021/ie000361n] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samer O. Derawi
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Affiliation(s)
- Abhijit Y. Dandekar
- Department of Chemical Engineering, Technical University of Denmark, 2800 Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemical Engineering, Technical University of Denmark, 2800 Lyngby, Denmark
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Lindeloff N, Andersen SI, Stenby EH, Heidemann RA. Phase-Boundary Calculations in Systems Involving More than Two Phases, with Application to Hydrocarbon Mixtures. Ind Eng Chem Res 1999. [DOI: 10.1021/ie980415h] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Niels Lindeloff
- Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Simon I. Andersen
- Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Robert A. Heidemann
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, N.W., T2N 1N4 Calgary, AB Canada
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Abstract
We develop the potential theory of multicomponent adsorption close to a dew point. The approach is based on an asymptotic adsorption equation (AAE) which is valid in a vicinity of the dew point. By this equation the thickness of the liquid film is expressed through thermodynamic characteristics of the bulk phase. The AAE makes it possible to study adsorption in the regions of both the normal and the retrograde condensation. A simple correlation of the Kelvin radius for capillary condensation and the thickness of the adsorbed film is established. Numerical testing shows good agreement between the AAE and the direct calculations, even if the mixture is not close to a dew point. Copyright 1998 Academic Press.
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Affiliation(s)
- AA Shapiro
- Department of Chemical Engineering, Technical University of Denmark, Building 229, Lyngby, DK 2800, Denmark
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