Carbon capture and storage is one of the main pathways to reduce the emission of CO2. Among the different techniques to capture CO2, the absorption process has high importance.
Chemical absorption has been applied more often in the past century, and the research on solvents and the development of thermodynamic models have received extensive attention.
2-Methylimidazole (2-Meim) aqueous solution is a weak electrolyte chemical absorbent. The advantage of this solution is that the solubility of CO2 is based on physical absorption and chemical absorption, so a high loading of 2-Meim with CO2 is achieved.
2-Meim solution also has a low desorption heat compared with the alkanolamine solution, which gives it the advantage of low energy consumption during the separation-regeneration cycle. At present, there are few studies on the CO2 capture with imidazole solution, let alone the thermodynamic model.
Therefore, the objective of this project is to establish a thermodynamic model that can be used in process simulation, so the solubility and enthalpy of CO2 absorption are focused on.
There are chemical equilibrium and vapor-liquid phase equilibrium in the CO2/2-Meim/water ternary system. As for phase equilibrium, the j-g (e-NRTL, extended UNIQUAC) approach and the j-j (CPA, e-CPA, ePC-SATF) approach will be studied to find a suitable thermodynamic model to describe this system.
Main supervisor:
Georgios Kontogeorgis
Co- supervisor:
Xiaodong Liang