THERMAL STABILITY OF HYDROXYL AMMONIUM-BASED IONIC LIQUIDS

Ionic liquids have attracted extensive interest in recent years being environmentally
benign solvents. Considering the favorable properties of ionic liquids and the
disadvantages of the conventional organic solvents applied in absorption of CO2,
using ILs to capture CO2 has attracted much attention. Current research showed CO2
have high solubility in the hydroxyl ammonium-based ionic liquids. In order to
develop a novel process for absorption of CO2, it is necessary to have the knowledge
of thermal stabilities of ionic liquids. Here, we present an account of our research
into thermal stability of ammonium-based ionic liquids. Thermal Stability of three
ammonium-based ionic liquids monoethanolammonium acetate (MEAmOAc),
diethanolammonium acetate (DEAmOAc), and methyldiethanolammonium acetate
(MDEAmOAc) at the temperatures ranging from 25 – 400 °C and isothermal
stability at the temperature 40, 50, 60, 70 and 80 °C were determined. Result showed
that these hydroxyl ammonium-based ionic liquids were having more thermal
stability and, compared to alkanolamine MEA, DEA, and MDEA showed less mass
lost.