Supported Ionic Liquid Membranes for Metal Separation

Ola, Pius Dore; Matsumoto, Michiaki

doi:10.5772/65754

Cited by 7 publications

(2 citation statements)

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“…However, it is also possible to construct the membrane of a liquid phase. Liquid membranes come in different types (Ola and Matsumoto, 2017), the type applicable for gas separation are supported liquid membranes (SLM). SLMs consist a liquid phase supported by impregnation of a microporous membrane or in some cases chemically bound to the solid support.…”

Section: Frontiers In Chemical Engineeringmentioning

confidence: 99%

Review of technologies for carbon monoxide recovery from nitrogen- containing industrial streams

James¹,

Lücking²,

Dijk³

et al. 2023

Front. Chem. Eng.

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Carbon monoxide (CO) is an important gas required for various industrial processes. Whether produced directly from syngas or as part of by-product gas streams, valorization of CO streams will play an important role in the decarbonization of industry. CO is often generated in mixtures with other gases such as H2, CO2, CH4, and N2 and therefore separation of CO from the other gases is required. In particular, separation of CO from N2 is difficult given their similar molecular properties. This paper summarizes the current state of knowledge on the four processes for separation of CO from gas mixtures: cryogenic purification, absorption, adsorption and membrane separation. Particular emphasis is placed on technical processes for industrial applications and separation of N2 and CO. Cryogenic processes are not suitable for separation of CO from N2. Absorption developments focus on the use of ionic liquids to replace solvents, with promising progress being made in the field of CO solubility in ionic liquids. Advancements in adsorption processes have focused on the development of new materials however future work is required to develop materials that do not require vacuum regeneration. Membrane processes are most promising in the form of solid state and mixed matrix membranes. In general, there is limited development beyond lab scale for new advancements in CO separation from gas streams. This highlights an opportunity and need to investigate and develop beyond state-of-the-art processes for CO separation at industrial scale, especially for separation of CO from N2.

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Section: Frontiers In Chemical Engineeringmentioning

confidence: 99%

Review of technologies for carbon monoxide recovery from nitrogen- containing industrial streams

James¹,

Lücking²,

Dijk³

et al. 2023

Front. Chem. Eng.

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“…SILMs can be prepared using chemical or physical methods [ 47 ] including immobilization of an ionic liquid by impregnation [ 48 ], sol-gel method [ 49 ], encapsulation [ 50 ], and immobilization via covalent bonding [ 51 ]. For the two major preparation techniques, coating [ 33 , 40 ] and soaking, the prevailing processes rely on pressure or vacuum-assisted infiltration [ 32 , 34 , 39 , 41 ].…”

Section: Supported Ionic Liquid Membranesmentioning

confidence: 99%

A Review on Ionic Liquid Gas Separation Membranes

et al. 2021

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Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane materials and membranes for gas and vapor separation, ionic liquids have been investigated extensively in the last decade and a half. This review gives a complete overview of the main developments in the field of ionic liquid membranes since their first introduction. It covers all different materials, membrane types, their preparation, pure and mixed gas transport properties, and examples of potential gas separation applications. Special systems will also be discussed, including facilitated transport membranes and mixed matrix membranes. The main strengths and weaknesses of the different membrane types will be discussed, subdividing them into supported ionic liquid membranes (SILMs), poly(ionic liquids) or polymerized ionic liquids (PILs), polymer/ionic liquid blends (physically or chemically cross-linked ‘ion-gels’), and PIL/IL blends. Since membrane processes are advancing as an energy-efficient alternative to traditional separation processes, having shown promising results for complex new separation challenges like carbon capture as well, they may be the key to developing a more sustainable future society. In this light, this review presents the state-of-the-art of ionic liquid membranes, to analyze their potential in the gas separation processes of the future.

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