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Inhomogeneities SIGNED

Micro-scale inhomogeneities in compressed systems and their impact onto the PROCESS- functioning-chain and the PRODUCT-characteristics

Total Cost €


EC-Contrib. €






 Inhomogeneities project word cloud

Explore the words cloud of the Inhomogeneities project. It provides you a very rough idea of what is the project "Inhomogeneities" about.

reactions    vibration    place    ratio    separations    influence    functioning    volume    sensor    oh    exceeds    fluid    signature    simultaneously    chain    onset    generation    instance    antisolvent    raman    reached    transitions    inhomogeneities    compressed    co2    bonds    micro    signals    intensity    size    stretch    alcohols    ratios    extend    mixing    probe    transition    hydrogen    homogeneous    though    viscosity    lifetime    gas    water    particle    intermolecular    spectroscopic    self    macro    uniform    provides    diffusivities    situ    homogeneity    mixtures    handled    surfactant    composition    combustion    separation    emissions    technique    themselves    distributions    extracted    influenced    exhibit    sub    mechanisms    spectrum    interaction    mixture    unfavourable    reaction    responsible    purpose    pollutant    pressure    free    signal    hydrates    analyze    particulate    kinematic    emulsions    invasive    smaller    degree    supercritical   

Project "Inhomogeneities" data sheet

The following table provides information about the project.


Organization address
postcode: 9599

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Total cost 1˙943˙750 €
 EC max contribution 1˙943˙750 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-05-01   to  2020-04-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Compressed fluid systems handled in high pressure processes feature diffusivities smaller than the kinematic viscosity. Therefore during mixing the lifetime of micro(µ)-scale(s) inhomogeneities exceeds that one of macro(m)-scale(s) inhomogeneities. Thus m-s homogeneous systems can still exhibit µ-s inhomogeneities. They affect the functioning-chain of processes, e.g. reactions and phase-transitions or –separations, which themselves also take place on a sub-macro-scale. Therefore it will be analyzed in situ how µ-s inhomogeneities influence the functioning chain of the particle generation (supercritical antisolvent technology), the reaction (high pressure combustion), and the phase-separation or phase-transition mechanisms (surfactant-free CO2-based micro-emulsions and gas hydrates) and to which extend these inhomogeneities are responsible for the characteristics of the product, such as unfavourable size distributions of particulate products and/or pollutant emissions. On this purpose the here proposed and self-developed non-invasive and in situ Raman spectroscopic technique considers the INTENSITY-ratios of Raman signals to analyze the m-s composition and the SIGNATURE of the OH stretch vibration Raman signal of water (or alcohols) to analyze the µ-s composition of fluid mixtures. The SIGNATURE of the OH stretch vibration Raman signal is influenced by the development of the hydrogen bonds -an intermolecular interaction- and thus provides the µ-s composition, though the probe volume of the Raman sensor is m-s. The signal-INTENSITY-ratio and signal-SIGNATURE are extracted both from one and the same “m-s” Raman spectrum of the mixture. This allows the comparison of the degree of mixing on m-s and µ-s simultaneously, and enables the analysis of whether a system at any instance of mixing (instance of the onset of a reaction or a phase transition or –separation) has reached the favourable µ-s homogeneity, which would result in homogeneous and uniform products.


year authors and title journal last update
List of publications.
2015 Andreas Braeuer, Robert Fabian Hankel, Markus Konstantin Mehnert, Julian Jonathan Schuster, Stefan Will
A Raman technique applicable for the analysis of the working principle of promoters and inhibitors of gas hydrate formation
published pages: 1145-1149, ISSN: 0377-0486, DOI: 10.1002/jrs.4744
Journal of Raman Spectroscopy 46/11 2019-11-12
2019 Simon Stehle, Ebrahim Nemati Lay, Alessandro Triolo, Nora Ventosa, Andreas Siegfried Braeuer
A fast and remote screening method for sub-micro-structuration in pressurized mixtures containing water and carbon dioxide
published pages: 104555, ISSN: 0896-8446, DOI: 10.1016/j.supflu.2019.104555
The Journal of Supercritical Fluids 152 2019-11-12
2019 Simon Stehle, Andreas Siegfried Braeuer
Hydrogen Bond Networks in Binary Mixtures of Water and Organic Solvents
published pages: , ISSN: 1520-6106, DOI: 10.1021/acs.jpcb.9b02829
The Journal of Physical Chemistry B 2019-11-12
2018 Tobias C. Klima, Andreas S. Braeuer
Raman Thermometry in Water, Ethanol, and Ethanol/Nitrogen Mixtures from Ambient to Critical Conditions
published pages: 1043-1048, ISSN: 0003-2700, DOI: 10.1021/acs.analchem.8b04382
Analytical Chemistry 91/1 2019-03-18
2019 Christine Carola Holzammer, Andreas Siegfried Braeuer
Raman Spectroscopic Study of the Effect of Aqueous Salt Solutions on the Inhibition of Carbon Dioxide Gas Hydrates
published pages: , ISSN: 1520-6106, DOI: 10.1021/acs.jpcb.8b11040
The Journal of Physical Chemistry B 2019-03-12
2019 Tobias C. Klima, Andreas S. Braeuer
Vapor-liquid-equilibria of fuel-nitrogen systems at engine-like conditions measured with Raman spectroscopy in micro capillaries
published pages: 312-319, ISSN: 0016-2361, DOI: 10.1016/j.fuel.2018.10.108
Fuel 238 2019-03-18
2017 Natascia Grimaldi, Paula Elena Rojas, Simon Stehle, Alba Cordoba, Ralf Schweins, Santi Sala, stefan luelsdorf, David Piña, Jaume Veciana, Jordi Faraudo, Alessandro Triolo, Andreas Siegfried Braeuer, Nora Ventosa
Pressure-Responsive, Surfactant-Free CO 2 -Based Nanostructured Fluids
published pages: , ISSN: 1936-0851, DOI: 10.1021/acsnano.7b02500
ACS Nano 2019-05-27
2017 Christine Holzammer, Judith M. Schicks, Stefan Will, Andreas S. Braeuer
Influence of Sodium Chloride on the Formation and Dissociation Behavior of CO 2 Gas Hydrates
published pages: 8330-8337, ISSN: 1520-6106, DOI: 10.1021/acs.jpcb.7b05411
The Journal of Physical Chemistry B 121/35 2019-05-27
2017 Daniel Bassing, Andreas S. Braeuer
The lag between micro- and macro-mixing in compressed fluid flows
published pages: 105-113, ISSN: 0009-2509, DOI: 10.1016/j.ces.2017.01.034
Chemical Engineering Science 163 2019-05-27
2016 Christine Holzammer, Agnes Finckenstein, Stefan Will, Andreas S. Braeuer
How Sodium Chloride Salt Inhibits the Formation of CO 2 Gas Hydrates
published pages: 2452-2459, ISSN: 1520-6106, DOI: 10.1021/acs.jpcb.5b12487
The Journal of Physical Chemistry B 120/9 2019-05-27

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