Thermophysical Properties of Long-Chained Hydrocarbons, Alcohols, and their Mixtures with Dissolved Gases

Third party funded individual grant


Project Details

Project leader:
Prof. Dr.-Ing. Andreas Paul Fröba


Contributing FAU Organisations:
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties

Funding source: DFG-Einzelförderung / Sachbeihilfe (EIN-SBH)
Start date: 01/11/2018
End date: 31/10/2021


Abstract (technical / expert description):



At
present, increasing technical interest in processes with liquids containing
dissolved gases can be found in chemical and energy engineering. Some examples
are the separation of flue gases by suitable absorbents, the production of high-value
fuels or petroleum products from synthesis gas, or the storage and transport of
hydrogen via liquid carriers. For the design and optimization of corresponding processes,
accurate information about the thermophysical properties of the involved fluid
systems is necessary. Until now, however, transport and equilibrium properties for
liquids with dissolved gases over a wide range of thermodynamic states are
scarce. This is caused by limitations of experimental methods as well as the lack
of theoretical models and prediction methods. In the suggested Sino-German
research project, a systematic study of different thermophysical properties of
hydrocarbons, alcohols, and their mixtures with dissolved gases over a wide
range of temperatures up to about 600 K is proposed. For these specific
systems, the investigations should contribute to a fundamental understanding how
the variation of the molecular structure of the liquids and of the dissolved gases
influences the thermophysical properties density, solubility, viscosity, and surface
tension. The German research team at the University of Erlangen-Nuremberg
focuses on the characterization of the systems by molecular dynamics (MD)
simulations and surface light scattering (SLS). Besides density and viscosity,
the MD simulations should also access solubility and surface tension. While for
the latter properties the MD methodology has to be refined within the project,
the SLS-technique was recently developed by the German research team for a reliable
determination of viscosity and surface tension at high temperatures. For these
properties, the Chinese research team at Xi'an Jiaotong University applies
theoretical models based on hard sphere and corresponding states theory as well
as experimental methods in form of the pedant drop and vibrating wire techniques.
Viscosities and surface tensions determined in parallel by the two teams for
the same selected systems will serve as mutual reference data. The individual
activities in form of the determination of density via the vibrating U-tube
method by the German team and of the solubility via a gravimetric technique by
the Chinese team are complementary and of joint interest. Thus, the already existing
co-operation between both research teams will be further extended within the
project. For the selected liquids with dissolved gases, the expectable reliable
and comprehensive database should serve as basis for a fundamental
understanding of their structure-property relationships. This supports the
development of theoretical and empirical models for the description of thermophysical
properties of arbitrary systems consisting of hydrocarbons or alcohols with dissolved
gases.


External Partners

Xi'an Jiaotong University (XJTU) / 西安交通大学

Last updated on 2019-13-03 at 08:00