About us

Dr. Christian Ihmels 

 

Dr. Christian Ihmels

Managing Director

Phone: +49 441 36 11 19 - 23

Fax: +49 441 36 11 19 - 24

E-mail:
tl_files/images/ci_email.jpg
 

Curriculum Vitae

Publications

 

 

 

Curriculum Vitae

 
   
Studies:  
1992 - 1998 Study of Chemistry at the University of Oldenburg
1998 Master Thesis at the University of Oldenburg, Department of Industrial Chemistry, Research Group of Prof. Dr. J. Gmehling: "Development of Computer-Controlled Measurement Apparatus for Pressure- and Temperature-Dependent Densities with a Vibrating Tube Prototype and for Temperature-Dependent Viskosities with a Ubbelohde-Capillary-Viscometer"
   
Doctoral Thesis:  
1998 - 2001 PhD Thesis at the University of Oldenburg, Department of Industrial Chemistry, Research Group of Prof. Dr. J. Gmehling: "Experimental Determination, Correlation and Prediction of Densities and Vapor Pressures"
Aug. / Sep. 2000 Research at Bayer AG Leverkusen "Measurement of Vapor Pressures in the Pascal-Range and Development of a Measurement Data Evaluation Software"
2000 - 2003 Scholarship of the Max-Buchner-Forschungsstiftung
   
Research Activity:  
Since 1996 Development of Automated Measurement Technology for Different Properties (e.g. Density, Viscosity, Thermal Conductivity, Speed of Sound)
Since 2000 Equation of State for Pure Compounds and Mixtures in Cooperation with the NIST (Boulder, USA)
Since 2002 Development of the Calculation & Correlation Software DynaSol ThermoProp
Since 2004 Independent Research Project ThermoVersum for Experimental Determination of Density, Speed of Sound, Viscosity etc. (supported by the LTP GmbH)
Since 2007 Development of a Multi-Device Measurement Control Software DynaSol AutoTPX 
   
Employment:  
1997 - 2002 Researcher at the University of Oldenburg, Department of Industrial Chemistry, Research Group of Prof. Dr. J. Gmehling in the Project "Pure Component Properties" (DDB-Pure)
Since August 2002 Researcher at the Laboratory for Thermophysical Properties (LTP GmbH), Associate Institute at the University of Oldenburg
Since July 2008 Managing Director of the Laboratory for Thermophysical Properties (LTP GmbH)
   
Teaching Activity:  
2005 Supervision of the thechnical chemistry practicum at the University of Oldenburg
Since 2008 Lectureship at the University of Oldenburg
"Experimentelle Bestimmung von Stoffdaten"
 
 

 

 

Publications

 

Books:

    1. Ihmels E.C., "Entwicklung computergesteuerter Meßapparaturen für druck- und temperaturabhängige Dichten mit einem Biegeschwinger-Prototyp und für temperaturabhängige Viskositäten mit einem Ubbelohde-Kapillarviskosimeter", Master Thesis, Oldenburg, 1998

    2. Ihmels E.C. "Experimentelle Bestimmung, Korrelation und Vorhersage von Dichten und Dampfdrücken", Doctoral Thesis, Shaker Verlag, Aachen, 2002


Journals:

  1. Ihmels E.C., Fiege C., Rarey J., Gmehling J., "Computergestützte Messung von Flüssigkeitsdichten in einem weiten Temperatur und Druckbereich", Chemie Ingenieur Technik, 71 (6), 605-609 (1999)

  2. Ihmels E.C., Aufderhaar C., Rarey J., Gmehling J., "Computer Controlled Vibrating Tube Densimeter for Liquid Density Measurement in a Wide Temperature and Pressure Range", Chemical Engineering and Technology, 23(5), 409-412 (2000)

  3. Ihmels E.C. and Gmehling J., "Densities of Toluene, Carbon Dioxide, Carbonyl Sulfide, and Hydrogen Sulfide over a Wide Temperature and Pressure Range in the Sub- and Supercritical State", Ind. Eng. Chem. Res., 40(20), 4470-4477 (2001)

  4. Ihmels E.C. and Gmehling J. "Densities of Sulfur Hexafluoride and Dinitrogen Monoxide over a Wide Temperature and Pressure Range in the Sub- and Supercritical State", Int. J. Thermophys., 23(3), 709-743 (2002)

  5. Ihmels E.C., Horstmann S., Fischer K., Scalabrin G., Gmehling J. "Compressed Liquid and Supercritical Densities of 1,1,1,2,3,3,3-Heprafluoropropane (R227ea)", Int. J. Thermophys., 23(6), 1571-1585 (2002)

  6. Ihmels E.C. and Gmehling J., "Compressed Liquid Densities of Methyl tert-Butyl Ether (MTBE), Ethyl tert-Butyl Ether (ETBE), and Diisopropyl Ether (DIPE)", J. Chem. Eng. Data, 47(5), 1307- 1313 (2002) 

  7. Ihmels E.C. and Gmehling J., Liquid Densities and Excess Volumes of Diisopropyl Ether (DIPE) + 1-Butanol Mixtures from 273 to 473 K and Pressures up to 35 MPa", J. Chem. Eng. Data, 47(5), 1313-1319 (2002)

  8. Zuniga-Moreno A., Galicia-Luna L.A., Horstmann S., Ihmels, C., Fischer K. "Compressed Liquid Densities and Excess Volumes for the Binary Systems Carbon Dioxide + 1-Propanol and Carbon Dioxide + 2-Propanol Using a Vibrating Tube Densimeter up to 25 MPa", J. Chem. Eng. Data, 47, 1418-1424 (2002)

  9. Ihmels E.C. and Gmehling J, "Liquid Densities of g-Butyrolactone and N-Methyl-2-pyrrolidone (NMP) from 273 to 473 K at Pressures up to 40 MPa", J. Chem. Eng. Data, 47(6), 1547-1552 (2002)

  10. Ihmels E.C. and Gmehling J, "Extension and Revision of the Group Contribution Method GCVOL for the Prediction of Liquid Densities", Ind. Eng. Chem. Res., 42(2), 408-412 (2003) 

  11. Ihmels E.C., Lemmon E.W., Gmehling J, "A Helmholtz-type Equation of State and Compressed Liquid and Supercritical Densities for Sulfur Dioxide", Fluid Phase Equilib.,  207(1-2), 111-130 (2003) 

  12. Ihmels E.C., Fischer K., Gmehling J., "Thermodynamic properties of the butenes Part I. Experimental densities, vapor pressures, and critical points", Fluid Phase Equilib.,  228-229, 155-171 (2005) 

  13. Lemmon E.W., Ihmels E.C., "Thermodynamic properties of the butenes Part II. Short fundamental equations of state", Fluid Phase Equilib.,  228-229, 155-171 (2005)

  14. Ihmels E.C., Safarov J., Hasel E., Gmehling J., "(p, r, T) properties, and apparent molar volumes Vf of ZnBr2 in methanol at T = (298.15 to 398.15) K and pressures up to p = 40 MPa", J. Chem.Thermodyn., 37, 1318-1326 (2005)

  15. Ihmels E.C., Safarov J., Hasel E., Gmehling J., "(p, r, T) properties, and apparent molar volumes Vf of CaCl2 in methanol at T = (298.15 to 398.15) K and pressures up to p = 40 MPa", J. Chem.Thermodyn., 38, 224-229 (2006)

  16. Marchi P., Scalabrin G., Ihmels E.C., Fischer K., Gmehling J., "PrTx Measurements for (1,1,1,2-Tetrafluoroethane + Triethylene Glycol Dimethyl Ether) at High Haloalkane Content",  J. Chem. Eng. Data, 51, 992-996 (2006)

  17. Ihmels E.C., Safarov J.T., "(p, r, T) Properties, and Apparent Molar Volumes Vf of ZnCl2 in CH3OH", J. Chem. Eng. Data, 51, 1015-1019 (2006)

  18. Marchi P., Scalabrin G., Ihmels E.C., Fischer K., Gmehling J., "Bubble pressure measurements for the (1,1,1,2-tetra.uoroethane + triethylene glycol dimethyl ether) system", J. Chem. Thermodynamics, 38, 1247-1253 (2006)

  19. Ihmels E.C., Safarov J.T., "(p, r, T) properties and apparent molar volumes Vf of LiNO3 in methnaol", J. Chem. Thermodynamics, 38, 1443-1449 (2006)

  20. Ihmels E.C., Safarov J.T., "(p, r, T) properties and apparent molar volumes of LiI in CH3OH", J. Mol. Liquids, 133, 146-151 (2007)

  21. Marchi P., Scalabrin G., Ihmels E.C., Richon D., "A Fundamental Equation of State for the (R134a 1 Triethylene Glycol Dimethyl Ether) Mixture", AIChE J., 53, 1349-1361 (2007)

  22. Ihmels E.C., Lemmon E.W., "Experimental densities, vapor pressures, and critical point, and a fundamental equation of state for dimethyl ether", Fluid Phase Equilib., 260, 36-48 (2007)

  23. Grigiante M., Stringari P., Scalabrin G., Ihmels E.C., Fischer K., Gmehling J., "(Vapour + liquid + liquid) equilibria and excess molar enthalpies of binary and ternary mixtures of isopropanol, water, and propylene", J. Chem. Thermodyn., 40, 537-548 (2008)

  24. Machado J.J.B., de Loos T. W., Ihmels E. C, Fischer K., Gmehling J., "High pressure solid–solid and solid–liquid transition data for long chain alkanes", J. Chem. Thermodyn., 40, 1632-1637 (2008)

  25. Schedemann A., Ihmels E.C., Gmehling J., "Liquid densities of THF and excess volumes for the mixture with water in a wide temperature and pressure range", Fluid Phase Equilib., 295, 201-207 (2010)

  26. Ihmels E.C., "The Critical Surface", J. Chem. Eng. Data, 55, 3474-3480 (2010)

  27. Abbas R., Ihmels E.C., Enders S., Gmehling J., "Joule-Thomson coefficients and Joule-Thomson inversion curves for pure compounds and binary systems predicted with the group contribution equation of state VTPR", Fluid Phase Equilib., 306, 181-189 (2011)

  28. Abbas R., Ihmels E.C., Enders S., Gmehling J., "Measurement of transport properties for selected siloxanes and their mixtures used as working fluids for organic rankine cycles", Ind. Eng. Chem. Res., 50 (14), 8756–8763 (2011)

  29. Abbas R., Schedemann A., Ihmels E.C., Enders S., Gmehling J., "Measurement of thermophysical pure component oroperties for a few siloxanes used as working fluids for organic rankine cycles", Ind. Eng. Chem. Res., 50 (16), 9748–9757 (2011)



    Conference or meeting oral presentations:

     

    1. Ihmels E.C. und Gmehling J., "Automatisierte Dichtemessung über einen weiten Temperatur- und Druckbereich", DECHEMA-Arbeitsausschuss "Ingenieurdaten", 6th October 1999, Karlsruhe/Germany

    2. Ihmels E.C., "Messen und Modellieren komprimierter Fluide", 28. Tieftemperatur-Thermodynamik-Kolloquium TTTK, 19th to 26th February 2000, Ischgl/Austria

    3. Becker L., Ihmels E.C., Rarey J., Gmehling J., "Development of a Data Bank and Estimation Methods for Pure Component Properties", CHISA 2000, 27th to 31th August 2000, Prague

    4. Ihmels E.C., "Dampfdrücke im Pascal-Bereich", 29. Tieftemperatur-Thermodynamik-Kolloquium TTTK, 17th to 24th February 2001, Heiligenblut/Austria

    5. Ihmels E.C. und Gmehling J., "Messung und Korrelation von Dichten und Exzessvolumina in der komprimierten flüssigen und überkritischen Phase über einen weiten Temperatur- und Druckbereich", DECHEMA-Arbeitsausschuss "Ingenieurdaten", 10th October 2001, Würzburg/Germany

    6. Ihmels E.C., "From High Temperature & High Pressure Densities to Pascal Range Vapor Pressures – A Short Experimental Survey", NIST Meeting, May 24, 2004, Boulder, Colorado/U.S.A.

    7. Ihmels E.C., "Short Fundamental Equations of State – Modeling and Calculation of Pure Component Properties in the Practice", UNIFAC/DDBST Meeting 2005, September 20, 2005, Oldenburg/Germany

    8. Ihmels E.C., "Helmholtz Type Fundamental Equations of State – Some Practice Applications", 16. Symposium on Thermophysical Properties, July 30 to August 4, 2006, Boulder, Colorado/U.S.A.

    9. Ihmels E.C., "Precise Data for Technical Applications: From Measurements to Equations of State", 17. Symposium on Thermophysical Properties, June 21 to 26, 2009, Boulder, Colorado/U.S.A.

    10. Abbas R., Ihmels E.C., Gmehling J., Enders S., "Thermodynamik des Organic Rankine Cycle-Prozesses", Thermodynamik Kolloquium, October 4 to 6, 2010, Bayreuth, Germany

    11. Ihmels E.C., Grybat A., Horstmann S., "Magnetic Suspension Balance Setup for Simultaneous Saturated Liquid and Gas Phase Density Determinations", 18th Symposium on Thermophysical Properties, June 24 to 29, 2012, Boulder, Colorado/U.S.A.

     

    Poster presentations:

     

    1. Becker, L., Ihmels, E.C., Rarey J., "Pure Component Data Bank", ACHEMA, Frankfurt, May 2000.

    2. Ihmels E.C., Lemmon E.W., Fischer K., Gmehling J., "Experimental Determination of Thermophysical Properties to Build Accurate Equations of State for Pure Liquified Gases", 20th ESAT, Lahnstein, 8. to 12. October 2003.

    3. Ihmels E.C., Lemmon E.W., Fischer K., Gmehling J., "Experimental Thermodynamic Properties and Fundamental Equations of State for the Four Butene Isomeres", 10th International PPEPPD, Snowbird, Utah, USA, 16. to 21. May 2004.

    4. Ihmels E.C., "Helmholtz Type Fundamental Equations of State – Some Practice Applications", 3rd International Meeting on High Pressure Chemical Engineering 2006, May 10. to 12., 2006, Erlangen, Germany

    5. Ihmels E.C., Grybat A., Horstmann S., Fischer K., "Viscosity, Thermal Conductivity, and Surface Tension at High Pressures", 3rd International Meeting on High Pressure Chemical Engineering 2006, May 10. to 12., 2006, Erlangen, Germany and 16. Symposium on Thermophysical Properties, July 30 to August 4, 2006, Boulder, Colorado/U.S.A.

    6. Ihmels E.C., Grybat A., Horstmann S., "Viscosity, Thermal Conductivity, and Surface Tension at Extreme Conditions", 23rd European Symposium on Applied Thermodynamics (ESAT), May 29. to June 1., 2008, Cannes, France, 20th International Conference on Chemical Thermodynamics, August 3 to 8, 2008, Warsaw, Polland, and Thermodynamik Kolloqium und Ingenieurdaten, September 24 to 26, 2008, Erlangen, Germany

    7. Abbas R., Enders S., Ihmels E.C., Gmehling J., "Thermodynamik des Organic-Rankine Cycle-Prozesses", VDI Thermodynamik-Kolloquium und Ingenieurdaten, October 5 to 7, 2009, Berlin, Germany

    8. Schedemann A., Ihmels E.C., Berje J., Gmehling J., "Measurements of densities and excess volumes up to 1300 bar", VDI Thermodynamik-Kolloquium und Ingenieurdaten, October 4 to 6, 2010, Bayreuth, Germany