Pengjin Liu <br/><br/>
Simulation study on efficient decarbonisation of coal-fired power plant flue gas using ionic liquid to capture CO2  

 - pp1176-1187 
<br/><br/> The carbon dioxide (CO2) emission reduction technology has the limitation of high energy consumption, and the development of new and efficient capture media is a new way to achieve green and high-value utilisation of CO2. However, ionic<br/>liquids (ILs) have attracted the attention of researchers as a novel capture medium. In this study, Aspen Plus software was<br/>used to examine the process of capturing CO2 from flue gas of coal-fired power plants using ILs. The physical properties<br/>of 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) were analysed using known experimental data, and a<br/>process flow for physical absorption of CO2 was established. Based on the established full process model, a sensitivity<br/>analysis was conducted on the absorption tower and flash tank. The process simulation results showed that increasing<br/>the number of absorption tower plates and the lean liquid flow rate benefits CO2 absorption. The optimised absorption<br/>pressure is 3.0 MPa, the number of trays is 15, the lean liquid absorbent flow rate is 500 kmol/hr, the lean liquid feed temperature is 50°C, and the optimal operating conditions for the flash evaporation tank are a recovery pressure of 0.3 MPa<br/>and a recovery temperature of 150°C. The calculation of direct equipment investment cost in the process shows that with<br/>the increase of lean liquid load, the investment cost of all equipment except for the reboiler increases.<br/> 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Aspen Plus<br/>carbon dioxide<br/>CO2 capture<br/>ionic liquids<br/>process simulation