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{{Short description|German chemist (born 1946)}}
⚫ '''Jürgen Gmehling''' (born ], ] in ]) is a German ] for technical and industrial ] at the ].

⚫ '''Jürgen Gmehling''' (born January 13, 1946, in ]) is a retired<ref>{{Cite web|url=http://www.presse.uni-oldenburg.de/mit/2011/181.html|title = Pressedienst 17. Mai 2011: Chemiker Jürgen Gmehling im Ruhestand -- Universität Oldenburg}}</ref> German ] of technical and industrial ] at the ].


==Biography== ==Biography==
His career startet with an apprenticeship as laboratory assistant at the Duisburg copper works before he studied chemical engineering at the engineering school in ] and then chemistry in ] and ]. He received his ] from the ] in 1970 and the Ph.D. (Dr. rer. nat., ]) in 1973. After this he worked as scientific coworker in Dortmund before he became a private lecturer and, after his ], an assistant professor. His career started with an apprenticeship as a laboratory assistant at the Duisburg copper works<ref>{{cite web|url=http://www.ddbst.com/juergen-gmehling.html|title=Biography from DDBST company web site|access-date=2017-06-27}}</ref> before he studied ] at the engineering school in ] and then chemistry in ] and ]. He received his ] from the ] in 1970 and his PhD (Dr. rer. nat., ]) in 1973. After this he worked as a scientific coworker in Dortmund before he became a private lecturer and, after his ], an assistant professor.


Gmehling was appointed full professor for technical chemistry at the university in Oldenburg in 1989. Gmehling was appointed a full professor for technical chemistry at the ] in 1989 and retired in 2011.


==Fields of research== ==Fields of research==
Gmehling's main focusses are measurement, collection and estimation of thermophysical properties of components and component mixtures. The following list summarizes several fields of his scientific work in a concise manner but is in no way complete. Gmehling's main focus is the ]. This includes the development of software for process synthesis and ] as well as measurement, collection, and estimation of thermophysical properties of pure components and component mixtures. The following list summarizes fields of his scientific work but is in no way complete.


===Measurements=== ===Measurements===
* Phase equilibrium data (],<ref name="Horstmann Fischer Gmehling pp. 1499–1503">{{cite journal | last1=Horstmann | first1=Sven | last2=Fischer | first2=Kai | last3=Gmehling | first3=Jürgen | title=Isothermal Vapor−Liquid Equilibrium and Excess Enthalpy Data for the Binary Systems Water + Sulfolane and Methanol + N-Methyl-2-pyrrolidone | journal=Journal of Chemical & Engineering Data | publisher=American Chemical Society (ACS) | volume=49 | issue=6 | date=19 May 2004 | issn=0021-9568 | doi=10.1021/je034254m | pages=1499–1503}}</ref> liquid-liquid equilibria, solid–liquid equilibria,<ref name="Joh Kreutz Gmehling pp. 886–889">{{cite journal | last1=Joh | first1=Ralph | last2=Kreutz | first2=Jens | last3=Gmehling | first3=Jürgen | title=Measurement and Prediction of Ternary Solid−Liquid Equilibria | journal=Journal of Chemical & Engineering Data | publisher=American Chemical Society (ACS) | volume=42 | issue=5 | date=1 September 1997 | issn=0021-9568 | doi=10.1021/je970051k | pages=886–889}}</ref> gas solubilities, heats of mixing, activity coefficients<ref name="Gruber Topphoff Gmehling pp. 935–940">{{cite journal | last1=Gruber | first1=Detlef | last2=Topphoff | first2=Magnus | last3=Gmehling | first3=Jürgen | title=Measurement of Activity Coefficients at Infinite Dilution Using Gas−Liquid Chromatography. 9. Results for Various Solutes with the Stationary Phases 2-Pyrrolidone and N-Methylformamide | journal=Journal of Chemical & Engineering Data | publisher=American Chemical Society (ACS) | volume=43 | issue=6 | date=5 September 1998 | issn=0021-9568 | doi=10.1021/je9801213 | pages=935–940}}</ref> and more)
* Phase equilibrium data (vapor-liquid equilibria,<ref>Horstmann S., Fischer K., Gmehling J., "Isothermal Vapor-Liquid Equilibrium and Excess Enthalpy Data for the Binary Systems Water + Sulfolane and Methanol + N-Methyl-2-pyrrolidone", J.Chem.Eng.Data, 49(6), 1499-1503, 2004
</ref> liquid-liquid equilibria, solid-liquid equilibria,<ref>Joh R., Kreutz J., Gmehling J., "Measurement and Prediction of Ternary Solid-Liquid Equilibria", J.Chem.Eng.Data, 42(5), 886-889, 1997
</ref> gas solubilities, heats of mixing, activity coefficients<ref>Gruber D., Topphoff M., Gmehling J., "Measurement of activity coefficients at infinite dilution using gas-liquid chromatography. 8. Results for 22 solutes in tetraethylene glycol dimethyl ether and 18 solutes in triethylene glycol dibutyl ether at 303.15 K and 343.15 K", Eldata Int.Electron.J.Phys.-Chem.Data, 3, 215-224, 1997
</ref> and more)
* Pure component properties (heats of phase transitions, vapor pressures, densities, viscosities)
* Kinetics of reaction (heterogeneous catalysis)


===Data collection=== ===Data collection===
Gmehling began in the 1970s with the systematic evaluation of the scientific literature with the goal to build a data bank for vapor-liquid equilibria. These data were needed for the development of a new method for the prediction of activity coefficients named ]. This data bank is still named ],<ref>Gmehling J., Weidlich U., "Die Dortmunder Datenbank. Basis für die Weiterentwicklung der UNIFAC-Methode", Chem.Ing.Tech., 57(5), 447-449, 1985</ref> although it has expanded dramatically over the last decades, and is now maintained by a company located in ]. Gmehling began in the 1970s with the systematic evaluation of the scientific literature, aiming to build a data bank for vapor-liquid equilibria. These data were needed for the development of a new method for the prediction of activity coefficients named ]. This data bank is still named the ].<ref name="Gmehling Weidlich 1985 pp. 447–449">{{cite journal | last1=Gmehling | first1=Jürgen | last2=Weidlich | first2=Ulrich | title=Die Dortmunder Datenbank - Basis für die Weiterentwicklung der UNIFAC-Methode | journal=Chemie Ingenieur Technik | publisher=Wiley | volume=57 | issue=5 | year=1985 | issn=0009-286X | doi=10.1002/cite.330570512 | pages=447–449}}</ref>


===Development of estimation and correlation models=== ===Development of estimation and correlation models===
Gmehling developed, together with coworkers and in cooperations, especially Professor Aage Fredenslund from the Danmarks Tekniske Universitet, models for the estimation of several thermodynamic and thermophysical properties: Gmehling developed with colleagues models for the estimation of several thermodynamic and thermophysical properties:
* Activity coefficient models like ]<ref name="Fredenslund Gmehling Michelsen Rasmussen 1977 pp. 450–462">{{cite journal | last1=Fredenslund | first1=Aage | last2=Gmehling | first2=Jurgen | last3=Michelsen | first3=Michael L. | last4=Rasmussen | first4=Peter | last5=Prausnitz | first5=John M. | title=Computerized Design of Multicomponent Distillation Columns Using the UNIFAC Group Contribution Method for Calculation of Activity Coefficients | journal=Industrial & Engineering Chemistry Process Design and Development | publisher=American Chemical Society (ACS) | volume=16 | issue=4 | year=1977 | issn=0196-4305 | doi=10.1021/i260064a004 | pages=450–462}}</ref><ref name="Weidlich Gmehling 1987 pp. 1372–1381">{{cite journal | last1=Weidlich | first1=Ulrich | last2=Gmehling | first2=Juergen | title=A modified UNIFAC model. 1. Prediction of VLE, hE, and .gamma..infin. | journal=Industrial & Engineering Chemistry Research | publisher=American Chemical Society (ACS) | volume=26 | issue=7 | year=1987 | issn=0888-5885 | doi=10.1021/ie00067a018 | pages=1372–1381}}</ref> (see also ]) and extensions. For the further development of these widely used methods Gmehling founded an ] where many international companies are participating.
* Activity coefficient models like ]<ref>Fredenslund Å., Gmehling J., Michelsen M.L., Rasmussen P., Prausnitz J.M., "Computerized Design of Multicomponent Distillation Columns Using the UNIFAC Group Contribution Method for Calculation of Activity Coefficients", Ind.Eng.Chem. Process Des.Dev., 16(4), 450-462, 1977
⚫ * Equations of state (EOS)<ref name="Holderbaum Gmehling 1991 pp. 251–265">{{cite journal | last1=Holderbaum | first1=T. | last2=Gmehling | first2=J. | title=PSRK: A Group Contribution Equation of State Based on UNIFAC | journal=Fluid Phase Equilibria | publisher=Elsevier BV | volume=70 | issue=2–3 | year=1991 | issn=0378-3812 | doi=10.1016/0378-3812(91)85038-v | pages=251–265}}</ref> including mixing rules for applying EOS to mixtures (see ]).
</ref><ref>Weidlich U., Gmehling J., "A Modified UNIFAC Model. 1. Prediction of VLE, hE, and gamma Infinite", Ind.Eng.Chem.Res., 26(7), 1372-1381, 1987
</ref> (see also ]) and extensions. For the further development of these widely used methods Gmehling founded an ] where many international companies are participating.
⚫ * Equations of state (EOS)<ref>Holderbaum T., Gmehling J., "PSRK: A Group-Contribution Equation of State based on UNIFAC", Fluid Phase Equilib., 70, 251-265, 1991</ref> including mixing rules for applying EOS to mixtures (see ]).
* g<sup>E</sup> models
* Prediction of pure component properties (], liquid ], ])


===Software development=== ===Software development===
Considerable developments are besides the implementation of his own methods The following implementation of his methods are also developments:
* an expert system<ref>Möllmann C., Gmehling J., "Auswahl selektiver Zusatzstoffe für die Rektifikation durch kombinierten Zugriff auf experimentelle und vorausberechnete Gleichgewichtsdaten", Chem.Ing.Tech., 69(3), 324-328, 1997 * an expert system<ref name="Möllmann Gmehling 1997 pp. 324–328">{{cite journal | last1=Möllmann | first1=Christian | last2=Gmehling | first2=Jürgen | title=Auswahl selektiver Zusatzstoffe für die Rektifikation durch kombinierten Zugriff auf experimentelle und vorausberechnete Gleichgewichtsdaten | journal=Chemie Ingenieur Technik | publisher=Wiley | volume=69 | issue=3 | year=1997 | issn=0009-286X | doi=10.1002/cite.330690309 | pages=324–328}}</ref> for the entrainer selection for the azeotropic and extractive distillation
</ref> for the entrainer selection for the azeotropic and extractive distillation.
* programs for fitting parameters of g<sup>E</sup> models and many equations describing pure component properties

===Other fields of work===
Gmehling is also working on the research and optimization of chemical processes like reactive distillation and membrane processes.


== Awards == == Awards ==
] ]
⚫ Gmehling has received some awards:
Gmehling received the ''Arnold Eucken Award'' from the GVC (] society for chemical engineering). This award is aimed to support promising junior scientists.
* Arnold-Eucken Price in 1982 <ref>{{cite web |url=http://www.ddbst.com/juergen-gmehling.html|title=Biography from DDBST company web site|access-date=2017-06-27}}</ref>

* The Rosini Lectureship Award in 2008 <ref>{{cite web |url=http://www.iactweb.org/Awards/awardhistory.htm|title=Rossini Lectureship Award|access-date=2017-06-27}}</ref>
In August 2008 Gmehling received the ''Rossini Lectureship Award'' during the 20th International Conference on Chemical Thermodynamics in Warsaw, Poland. This award is presented by the Board of Directors of the International Association of Chemical Thermodynamics (short IACT) and is given for important contributions to the field of chemical thermodynamics. An important part of the award presentation is that the laureate has to hold a lecture where he presents his current and past work.
* The Gmelin-Beilstein-Denkmünze (Silver Medal) in 2010<ref>{{cite web |url=http://www.gmehling.chemie.uni-oldenburg.de/47168.html|title=University web page|access-date=2017-06-27}}</ref>

* The Emil Kirschbaum Medal in 2013 <ref>{{cite web|url=http://processnet.org/Emil+Kirschbaum_Medaille-p-343.html|title=ProcessNet web page|access-date=2017-06-27}}</ref>
==Company foundations==
⚫ Gmehling has founded two companies:
* The ''DDBST GmbH'' has been founded in 1989. Its main purpose is the further development of the Dortmund Data Bank.
* The ''LTP GmbH'' has been founded in 1999. The main purpose is the experimental determination of thermophysical data.


==Publications== ==Publications==
Gmehling has published scientific articles and books.
Gmehling has published, besides numerous scientific articles, several books. These are textbooks (e.g. ''Thermodynamics'' and ''Unit Operations'') as well as data collections that have been published by the DECHEMA (''DECHEMA Chemistry Data Series, DCDS'') and the publishers Wiley-VCH (''Azeotropic Data'').


===Selection of scientific articles=== ===Selection of scientific articles===
{{reflist}}
<references/>

==Reviewing==
Gmehling is co-publisher of three scientific journals and ] for several others. Additionally he has been reviewing scientific projects for the German (''Deutsche Forschungsgemeinschaft''), Czech, Finnish, and Slowenian scientific societies.


==External links== ==External links==
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Latest revision as of 21:32, 7 October 2023

German chemist (born 1946)

Jürgen Gmehling (born January 13, 1946, in Duisburg) is a retired German professor of technical and industrial chemistry at the Carl von Ossietzky University of Oldenburg.

Biography

His career started with an apprenticeship as a laboratory assistant at the Duisburg copper works before he studied chemical engineering at the engineering school in Essen and then chemistry in Dortmund and Clausthal. He received his diploma from the University of Dortmund in 1970 and his PhD (Dr. rer. nat., inorganic chemistry) in 1973. After this he worked as a scientific coworker in Dortmund before he became a private lecturer and, after his habilitation, an assistant professor.

Gmehling was appointed a full professor for technical chemistry at the University of Oldenburg in 1989 and retired in 2011.

Fields of research

Gmehling's main focus is the process development. This includes the development of software for process synthesis and process simulation as well as measurement, collection, and estimation of thermophysical properties of pure components and component mixtures. The following list summarizes fields of his scientific work but is in no way complete.

Measurements

  • Phase equilibrium data (vapor-liquid equilibria, liquid-liquid equilibria, solid–liquid equilibria, gas solubilities, heats of mixing, activity coefficients and more)

Data collection

Gmehling began in the 1970s with the systematic evaluation of the scientific literature, aiming to build a data bank for vapor-liquid equilibria. These data were needed for the development of a new method for the prediction of activity coefficients named UNIFAC. This data bank is still named the Dortmund Data Bank.

Development of estimation and correlation models

Gmehling developed with colleagues models for the estimation of several thermodynamic and thermophysical properties:

  • Activity coefficient models like UNIFAC (see also group contribution method) and extensions. For the further development of these widely used methods Gmehling founded an industry consortium where many international companies are participating.
  • Equations of state (EOS) including mixing rules for applying EOS to mixtures (see PSRK).

Software development

The following implementation of his methods are also developments:

  • an expert system for the entrainer selection for the azeotropic and extractive distillation

Awards

Rossini Lectureship Award; left: J.-P. E. Grolier; right: J. Gmehling

Gmehling has received some awards:

  • Arnold-Eucken Price in 1982
  • The Rosini Lectureship Award in 2008
  • The Gmelin-Beilstein-Denkmünze (Silver Medal) in 2010
  • The Emil Kirschbaum Medal in 2013

Publications

Gmehling has published scientific articles and books.

Selection of scientific articles

  1. "Pressedienst 17. Mai 2011: Chemiker Jürgen Gmehling im Ruhestand -- Universität Oldenburg".
  2. "Biography from DDBST company web site". Retrieved 2017-06-27.
  3. Horstmann, Sven; Fischer, Kai; Gmehling, Jürgen (19 May 2004). "Isothermal Vapor−Liquid Equilibrium and Excess Enthalpy Data for the Binary Systems Water + Sulfolane and Methanol + N-Methyl-2-pyrrolidone". Journal of Chemical & Engineering Data. 49 (6). American Chemical Society (ACS): 1499–1503. doi:10.1021/je034254m. ISSN 0021-9568.
  4. Joh, Ralph; Kreutz, Jens; Gmehling, Jürgen (1 September 1997). "Measurement and Prediction of Ternary Solid−Liquid Equilibria". Journal of Chemical & Engineering Data. 42 (5). American Chemical Society (ACS): 886–889. doi:10.1021/je970051k. ISSN 0021-9568.
  5. Gruber, Detlef; Topphoff, Magnus; Gmehling, Jürgen (5 September 1998). "Measurement of Activity Coefficients at Infinite Dilution Using Gas−Liquid Chromatography. 9. Results for Various Solutes with the Stationary Phases 2-Pyrrolidone and N-Methylformamide". Journal of Chemical & Engineering Data. 43 (6). American Chemical Society (ACS): 935–940. doi:10.1021/je9801213. ISSN 0021-9568.
  6. Gmehling, Jürgen; Weidlich, Ulrich (1985). "Die Dortmunder Datenbank - Basis für die Weiterentwicklung der UNIFAC-Methode". Chemie Ingenieur Technik. 57 (5). Wiley: 447–449. doi:10.1002/cite.330570512. ISSN 0009-286X.
  7. Fredenslund, Aage; Gmehling, Jurgen; Michelsen, Michael L.; Rasmussen, Peter; Prausnitz, John M. (1977). "Computerized Design of Multicomponent Distillation Columns Using the UNIFAC Group Contribution Method for Calculation of Activity Coefficients". Industrial & Engineering Chemistry Process Design and Development. 16 (4). American Chemical Society (ACS): 450–462. doi:10.1021/i260064a004. ISSN 0196-4305.
  8. Weidlich, Ulrich; Gmehling, Juergen (1987). "A modified UNIFAC model. 1. Prediction of VLE, hE, and .gamma..infin". Industrial & Engineering Chemistry Research. 26 (7). American Chemical Society (ACS): 1372–1381. doi:10.1021/ie00067a018. ISSN 0888-5885.
  9. Holderbaum, T.; Gmehling, J. (1991). "PSRK: A Group Contribution Equation of State Based on UNIFAC". Fluid Phase Equilibria. 70 (2–3). Elsevier BV: 251–265. doi:10.1016/0378-3812(91)85038-v. ISSN 0378-3812.
  10. Möllmann, Christian; Gmehling, Jürgen (1997). "Auswahl selektiver Zusatzstoffe für die Rektifikation durch kombinierten Zugriff auf experimentelle und vorausberechnete Gleichgewichtsdaten". Chemie Ingenieur Technik. 69 (3). Wiley: 324–328. doi:10.1002/cite.330690309. ISSN 0009-286X.
  11. "Biography from DDBST company web site". Retrieved 2017-06-27.
  12. "Rossini Lectureship Award". Retrieved 2017-06-27.
  13. "University web page". Retrieved 2017-06-27.
  14. "ProcessNet web page". Retrieved 2017-06-27.

External links

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