1. Ionic Liquids for CO2, Light Olefins, and Alkynes Separation: Material Selection and Solubility Investigations
Amabilis Jelliarko Palgunadi
Advisers: Prof. HoonSikKim & Prof. Minserk Cheong
Department of Chemistry
Kyung HeeUniversity
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2. 2
Thesis Outline
Non-Task Specific Ionic Liquids (TSILs) and Task Specific ILs for CO2Capture: Material Design and Solubility Investigations.
Room Temperature Ionic Liquids (RTILs) for Light AlkynesOlefins (C2C3) Separation: Material Selection and Solubility Investigation.
3. Introduction
Reaction & Separation Media
Analytical Chemistry
Lubricants
Ionic Liquids (ILs)
Ionic in composition
Inherent ionic strength
Tailored structure
Variable functional sites
Negligible volatility
Moderate polarity
Electrical conductivity
Liquid Crystals
Heat Carriers
Catalysts
Electrolytes
Advanced Materials Precursors
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4. 4
Introduction
Global warming and climate change have raised vast concern to mitigate the steep increase of CO2 concentration in the global atmosphere.
Major CO2 sources:

Fossil fueled power plant

5. Cement industriesThe real challenge is to clean-up post combustion emissions from fossil fuels burning activities which contains 315% of CO2 at 1 bar.
[1] http://cdiac.esd.ornl.gov/home.html
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Objective
CO2 Capture Employing Room Temperature Ionic Liquids (RTILs)
Established Liquid-based CO2 Scrubber System
Power PlantCoal Combustion


Room Temperature Ionic Liquids??
7. CO2 solubility Behavior in Non-Task Specific ILs
[BF4]
[PF6]
In situ ATR-IR spectra of dissolved CO2in the bending mode region[1]indication of Lewis acid-base interaction between CO2 and anion.
[1] Chem. Commun. 20 (2000) 2047-2048; Combining Ionic Liquids and Supercritical Fluids:in situATR-IR Study of CO2 Dissolved in Two Ionic Liquids at High Pressures.
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Solubility vsVolume Molar of RTIL
According to simplified regular solution theory (RST), linear correlation between CO2 solubility vs molar volume of RTILs suggests that non-specific physicalinteraction plays dominantly
8. Task Specific ILs Having Amino Acid Structure (AATSILs)
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Synthesis
amine
Me-acrylate
Feature:

Cheap materials

9. Customized structure 10. Simple reaction 11. green process (RT, water medium) AATSIL
Products
Property:

Viscousgell-like

12. Stable under constant 100 C for 1 month.[Bu4N][BzAPr]
[Bu4N][CyhexAPr]
[Bu4N][BuAPr]
[Bu4N][dEAEAPr]
13. Task Specific ILs Having Amino Acid Structure (AATSILs)
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30 %wt in H2O
30 %wt in EG
Recycle test (30 %wt in EG)
FT-IR and NMR spectroscopies suggest the formation of ammonium carbamate and bicarbonate species (chemical interaction) in the solution when CO2 is absorbed.
14. CONCLUSIONS
CO2solubilities in conventional RTILs are mostly controlled by weak, non-bonding interactions (i.e. van der Waals interaction).
Non-TSILs cannot compete with alkanolamine for CO2 scrubbing due to their extremly weak interaction with CO2.
To improve the CO2 absorption capacity, new IL-based chemical absorbents for CO2 having amino acid-like structure (AATSILs) have been synthesized.
AATSILs may be promising alternative agents to conventional alkanolamine for CO2 capture.
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15. Naphtha Cracking and Separation of Alkynes from Olefins
Objective
Naphtha Cracking

Separation Path

Acetylene Recovery Unit (Linde)

Room Temperature Ionic Liquids??
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16. Plausible Interaction Mode Between IL and Alkyne or Olefin
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H-bond donor
H-bond acceptor
Hacidic bond
H-bond donor
Van der Waals interaction
Alkyne and alkene
Ionic Liquid
pKa C2H2