CO2 capture with liquid crystals: selectivity analysis

 Exchange student:
Oriol Mesalles Molet

 

CO2 capture with liquid crystals: selectivity analysis

In the next decades, predictions foretell that carbon dioxide (CO2) capture technologies will have an important role in mitigating the emissions layout. Nevertheless, current CO2 technologies are either not mature or have large energy consumptions. Lately, liquid crystals have been considered as new material for absorption process. Liquid crystals have a structured phase between the solid and the isotropic (liquid) phase where solubility of supercritical gasses is much lower than in the isotropic phase. Just by decreasing the temperature a few degrees, the solubility change is significant.

In this context, the present document is part of a project whose objective is the research of liquid crystals for CO2 capture. In order to fulfil that goal, the objective is to find a liquid crystal that, as well as capturing the CO2, does not capture the other present gasses. This is known as selectivity. There is not much literature available for selectivity of liquid crystals for CO2 capture.

In this document, the experimental results of 4 liquid crystals in mixture with methane (CH4) can be found in order to evaluate its behaviour with the hydrocarbon. Furthermore, the same liquid crystals in mixture with CO2 will be compared and discussed. In parallel, modelling will be carried out to extract conclusions. It is suspected that polarity has an influence on the solubility and selectivity.

Final colloquium: 22 June 2012