Published Paper on soft-SAFT Modeling of Ionic Liquids

 

A Research Paper done in Collaboration with Alyatech has been published on The Journal of Supercritical Fluids

12th June 2016

The paper "High pressure solubility of CH4, N2O and N2 in 1-butyl-3-methylimidazolium dicyanamide: Solubilities, selectivities and soft-SAFT modeling" was published on "The Journal of Supercritical Fluids" last April

Article image

 

Abstract

The society and industry commitment to progressively reduce Green House Gases (GHGs) emissions forged important challenges that conventional gas separation processes are unable to overcome. Ionic liquids (ILs) have been attracting an outstanding attention during the last decade as a promising class of viable solvents to capture pollutants and for gas separation processes. Being the IL-based membranes gas separation controlled by the gas solubility in the IL rather than by its diffusivity, the solubility of gases in ILs stands as highly relevant input for their application in liquid membranes. As part of a continuing effort to develop an IL based process for high pressure capture of GHGs, the phase equilibria of nitrous oxide (N2O), methane (CH4) and nitrogen (N2) were investigated in this work. Experimental gas–liquid equilibrium data for N2O, CH4 and N2 in [C4C1im][N(CN)2] were determined in the (293 to 363) K temperature range, for pressures up to 70 MPa and gas mole fractions up to 35 %.

Unfavorable interactions towards the studied gases, with positive deviations to ideality, were observed for all the studied gases, placing the studied IL among those with the lowest selectivities reported. The observed behavior highlights that a delicate balance between the solvent polarity and its molar volume must be ascertained when a highly selective solvent for N2 or CH4 separation is envisaged. The soft-SAFT EoS successfully described the high pressure phase behavior data using the molecular model and parameters sets reported in previous works. A good description of the binary systems studied, including the small CH4 temperature dependency and the N2 reverse temperature dependency on the solubility were achieved using just one binary interaction parameter. This reinforces the use of soft-SAFT as an accurate model to describe the behavior of gases in ILs for different applications.

Availability

The paper is available through Elsevier website: High pressure solubility of CH4, N2O and N2 in 1-butyl-3-methylimidazolium dicyanamide: Solubilities, selectivities and soft-SAFT modeling

We use cookies to improve our services.

If you continue navigaiting, you accept their use. You can get more information in our Cookie Policy. Learn more

I understand

In order to be able to offer better services and obtain statistical information about the navigation carried out, AlyaTech uses cookies on its website.

What are cookies?

A cookie is a file that is downloaded to the user´s computer when accessing certain web pages. Cookies allow a web page, among other things, to store and retrieve information about the browsing habits of its users, in this case anonymously.

Information we collect

The cookies used through yourbrowser help us to obtain personal information about you when you interact on our website. The information that the cookies provide us are:

  • Your IP address.
  • The date, time of visit and the time that you navigated on our website.
  • The reference URL.
  • The total number of pages visited on our website.
  • Information about the device and browser used to access our website.
  • Location information, referring to the country and city from where you interact.

All the information we obtain, mentioned above, is used for the preparation of statistics and reports for the maintenance of the website, improvement of our services, enrichment of our data, better knowledge of our clients and their preferences for our services, as well as to improve the user experience on our website.

Updates and changes to the Cookies Policy

AlyaTech may modify this Cookies Policy in accordance with new legislative or regulatory requirements, or for the purpose of adapting this policy to the instructions issued by the Spanish Data Protection Agency. When significant changes occour, they will be communicated to the user through and informative notice on the website.

If you want more information about our use of cookies, you can send an e-mail to alyatech@alyatech.com