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 CO 2 Capture Using Deep Eutectic Solvents Prof. Emadadeen M. Ali King Saud University, Saudi Arabia.

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Presentation on theme: " CO 2 Capture Using Deep Eutectic Solvents Prof. Emadadeen M. Ali King Saud University, Saudi Arabia."— Presentation transcript:

1  CO 2 Capture Using Deep Eutectic Solvents Prof. Emadadeen M. Ali King Saud University, Saudi Arabia

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

3 Sources of CO 2 emissions

4 World-wide statistical data of CO 2

5 CO 2 separation process Separation using Sorbent/Solvent

6 Solvent Characteristics  Preparation and material Cost  Environmental impact  Capacity

7 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

8 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 environmentally-friendly alternatives to organic solvent for liquid/liquid extraction, and separation.  ILs face a challenge in large-scale industrial applications, due to complicated synthetic processes and the expensive raw material chemicals

9 Deep Eutectic Solvents  deep eutectic solvents (DESs) have been recognized as a cost effective alternative to ILs  DESs possess several advantages over traditional ILs., they can be prepared easily in high purity at low cost.  In addition, they are non-toxic, have no reactivity with water and most importantly being biodegradable

10 Objectives 1. Prepare different types of DES 2. Test the solubility of CO2 in these DES 3. Model the CO2 solubility using Peng-Robinson EoS

11 EC 400 Variable volume high pressure equilibrium cell (SEPAREX, France).

12 Experiment Protocol  The visual cell is cleaned, evacuated using vacuum pump, and kept at fixed temperature using a circulating water bath.  A pre-determined amount of DES is introduced to the cell using the HPLC pump. CO 2 is then introduced to the cell at a certain pressure.  The mixture is stirred using the magnetic bar until equilibrium is achieved.  The change in the volume of cell is recorded. The mass of dissolved CO 2 is calculated using Benedict-Webb-Robin equation of state

13 Solubility Modeling  Peng Robinson Equation of State  Subject to:

14 Solubility and physical properties of DES at T=25 o C, P=125 psi CodeComponentsRatioxT c, KP c, bar  D01BcGlycerol D02BbEthylene Glycol D03MbEthanol Amine D04MbEthanol Amine D05MbEthanol Amine D06CCEthanol Amine D07CCDi Ethanol Amine D08TABEthanol Amine D09TABDi Ethanol Amine D10TABTri Ethanol Amine BC: Benzyltryphenilphosphonium chloride, BB:n-Butyltriphenylphosphonium bromide, MB: Methyltriphenylphosphonium bromide, TAB: Tetra Butyl Ammonium Bromide

15 Solubility and physical properties of CC-salt /des at T=25 o C CodeComponentsRatio Pressure (bar)xT c, KP c, bar  I2CCTG I2CCTG I2CCTG I2CCTG CC: Choline Chloride, TG: Triethylene Glycol

16 Comparison of CO2 solubility in DESs, ♦ : experimental; ▲ : model; □ : corrected model

17 : CO2 solubility in CC-based DEs with pressure, ♦ : experimental; ▲ : model with fixed k; □ : model with variable k

18 Conclusions  The solubility of CO 2 in ethylene glycol and glycerol based DESs is much smaller than that in MEA aqueous solution  The solubility depended on the type of salt used and on the salt:HBD molar ratio.  The modeling results indicated the necessity to adjust the interaction parameter in order to improve the ability of the PR EoS to predict the CO 2 solubility

19 Thank you


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