 CO 2 Capture Using Ionic liquid Prepared by Ahmad T. Malki Ahmad K. AL-Askar Supervised by Prof. Emadadeen M. Ali Prof. Mohammad Asif

Global Worming Fossil fuels (coal, oil, natural gas) Carbon Dioxide (CO 2 ) Global Warming

Sources of CO 2 emissions

World-wide statistical data of CO 2

Objectives 1. Study the effectiveness of using Ionic Liquid (IL) (1- Butyl- 3-methylimidazolium tetrafluoroborate) as an alternative solvent for CO 2 capturing. 2. Compare the efficacy of IL with that of MEA in terms of Sorbent and energy requirements

CO 2 separation process Separation using Sorbent/Solvent

MEA Advantage & Disadvantages Advantage s  Inexpensive material (1ton of MEA cost $1100) Disadvantages  Low carbon dioxide loading capacity  Equipment corrosion  High-energy penalty during absorbent regeneration MEA: Monoethanolamin is the most common material used in industry to absorb CO 2

Ionic Liquids  A new class of compounds that have emerged in the last twenty years with several applications in chemical and physical separation.  ILs are salts with melting points below 100 degree C.  ILs are environmentally-friendly alternatives to organic solvent for liquid/liquid extraction, and separation.

Method of Solution  Peng Robinson Equation of State  Validated with experimental data  Predict CO2 solubility in IL  Predict VLE Temperature for stripping

Model Validation

Process Performance when x o =0.2, f = 85%, T=25 o C

Process performance when L=CO 2 cap/ m, f = 85%, T=25 o C

Advantage & Disadvantages of IL Advantages  Non-flammable and non- corrosive  Thermally and hydrolytically stable  Non-volatile  Minimize the environmental hazards Disadvantages  Expensive materials(1kg of IL cost $100)

Conclusions  The IL is favored over MEA because of ease of regenerating the spent sorbent. This is attributed to the non-chemical reaction during the absorption process.  Although IL is environmentally safe, the economic analysis however reveals high operational cost due to high pressure demand.

Recommendations  Use of Hybrid Technology to increase the CO 2 concentration (partial pressure) in the feed gas in order to decrease the power consumption in the absorber  Development of mixed solvent (IL+ low cost solvent) strategy, e.g. IL and MEA, IL and water etc. in order to reduce the cost