ركسانا رحمتيان

CO2 binding organic liquids (CO2-BOLs) or reversible ionic liquids (SILs) are non-aqueous solvents with variable polarity with CO2 stimulation, which can be used to absorb CO2 as used efficiently. In this research, three-component reversible ionic liquids consisting of tertiary alkanolamine dimethylethanolamine (DMEA), superbase 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) and first type amine ethanolamine (MEA) have been introduced as promoters, which are considered new solvents for absorbing carbon dioxide at high pressure. It was found that the DBU/DMEA/MEA solvent (molar ratio = 0.1: 0.6: 0.3) has the highest absorption capacity (eqα) of 0.6757 mol CO2/mol sol at 30 degrees Celsius. In addition, two-component reversible ionic liquids consisting of a tertiary alkanolamine and a primary amine were produced. The presence of amine leads to an increase in absorption efficiency, so that eqα at 30 °C in DMEA/MEA solvent (0.8: 0.2) is higher than DMEA/MEA solvent (0.9: 0.1). eqα in the first case with DMEA/MEA solvent (0.8: 0.2) was equal to 0.6587 and in the second case with the molar ratio of 0.9: 0.1 it was equal to 0.5738. Equilibrium adsorption data for one-component (DMEA), two-component (DMEA/MEA) and three-component (DBU/DMEA/MEA) systems at temperatures of 30 and 40 degrees Celsius and in the range of 0-40 bar Came. The molar ratios for the two-component DMEA/MEA system are (0.9: 0.1) and (0.8: 0.2) and for the three-component system the ratios are (0.1: 0.6: 0.3). and (0.1: 0.7: 0.2) was selected. After eva‎luating the ability of different solvents to absorb CO2, thermodynamic modeling of CO2 absorption in two solvents DMEA and DMEA/MEA was carried out using the φ-γ perspective using Peng-Robinson's equation of state and the NRTL activity coefficient model. So that the absolute relative average error (AAD%) of calculations for DMEA and DMEA/MEA systems was equal to 1.74% and 7.64%, respectively. Key words: switchable ionic liquids, thermodynamic modeling, carbon dioxide capture, Peng-Robinson equation of state, NRTL activity coefficient model.

مايعات يوني برگشت پذير , مدل سازي ترموديناميكي , جذب گاز دي اكسيدكربن , معادله ي حالت پنگ رابينسون , مدل ضريب اكتيويته NRTL

Switchable Ionic Liquids , Thermodynamic modeling , carbon dioxide capture , Peng-Robinson equation of state , NRTL activity coefficient model

roksana rahmatian

farzaneh feyzi