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Ionic Liquids for Carbon Dioxide Capture

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Sustainable Agriculture Reviews 38

Abstract

The worldwide increasing emission of carbon dioxide and undeniable effects of global warming have raised the necessity to enhance existing CO2 capture processes. In recent decade, ionic liquids (ILs), which are a group of salts that are liquid at temperatures below 100 °C, has been the subject of many CO2 capturing research studies by various scholars across the word. These exciting salts have the potential to improve selectivity and sorption capacity of conventional CO2 scrubbing solvents, CO2 adsorbents and membranes used for CO2 separation. In this chapter, we briefly review the advantages and disadvantages of using different ionic liquids and their various modifications for sorption of CO2. First, their physical characteristics including viscosity, thermal stability and biodegradability in their pure state and after absorption of carbon dioxide will be discussed. Then absorption capacity of pure conventional ionic liquids and their effective parameters such as cationic structure are introduced and compared with Functionalized and promoted ionic liquids. In this section, different functionalization and polymerization methods are reviewed and the challenges in each scheme are briefly discussed. Then the CO2 adsorption studies, which involved ionic liquids either as adsorbent medium or as enhancing agent, are reviewed. Solid ionic liquids as potential alternative for conventional adsorbents are briefly introduced and afterwards the chapter will be mostly dedicated to the different ionic liquid-supported solid porous materials in particular metal organic frameworks (MOFs). In this section, the methods of doping ionic liquids on the adsorbent surface, type of porous medium for ionic liquid interaction and the selectivity of resultant ionic liquid- supported material are considered.

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Abbreviations

AC:

Active carbon

CIL:

Conventional ionic liquids

FIL:

Functionalized ionic liquid

FTIR:

Fourier-transform infrared spectroscopy

IL:

Ionic liquid

MOF:

Metal-organic framework

PIL:

Polymerized ionic liquid

PMMA:

Porous poly(methylmethacrylate)

PTFE:

Polytetrafluoroethylene

PVFD:

Polyvinylidene Fluoride

SILM:

Supported ionic liquid membrane

SMH:

Silica microhoneycomb

TSIL:

Task-specific ionic liquid

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Correspondence to Mohammad Mesbah .

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Mesbah, M., Pouresmaeil, S., Galledari, S.A., Momeni, M., Shahsavari, S., Soroush, E. (2019). Ionic Liquids for Carbon Dioxide Capture. In: Inamuddin, Asiri, A., Lichtfouse, E. (eds) Sustainable Agriculture Reviews 38. Sustainable Agriculture Reviews, vol 38. Springer, Cham. https://doi.org/10.1007/978-3-030-29337-6_5

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