Single component, reversible ionic liquids for energy applications

Blasucci, Vittoria; Hart, Ryan; Mestre, Veronica Llopis; Hahne, Dominique Julia; Burlager, Melissa; Huttenhower, Hillary; Thio, Beng Joo Reginald; Pollet, Paméla; Liotta, Charles L.; Eckert, Charles A.

doi:10.1016/j.fuel.2009.11.015

Cited by 91 publications

(65 citation statements)

References 13 publications

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“…Because of their "tailor-made" nature the ionic liquids find applications as storage media for toxic gases, catalysts/solvents in organic syntheses, performance additives in pigments, and matrices [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquids: Synthesis and Applications in Catalysis

Rajni

2014

Advances in Chemistry

208

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Ionic liquids have emerged as an environmentally friendly alternative to the volatile organic solvents. Being designer solvents, they can be modulated to suit the reaction conditions, therefore earning the name "task specific ionic liquids. " Though primarily used as solvents, they are now finding applications in various fields like catalysis, electrochemistry, spectroscopy, and material science to mention a few. The present review is aimed at exploring the applications of ionic liquids in catalysis as acid, base, and organocatalysts and as soluble supports for catalysts.

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Section: Introductionmentioning

confidence: 99%

Ionic Liquids: Synthesis and Applications in Catalysis

Rajni

2014

Advances in Chemistry

208

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“…27 Possible causes of the significantly lower conductivities for the fully-converted RevIL include strong interactions between the anion and cation, bulky charge carriers and high viscosities. Furthermore, in the case of TEtoxySA-RevIL, which is a protic system, one must also consider the strong hydrogen bonding between the N-H groups 36 and the ionic bonding between the ammonium-carbamate ion pairs.…”

Section: Resultsmentioning

confidence: 99%

“…26 Silylamines adopt RevIL properties when they are switched in the presence of CO 2 and returned to the ML state with mild heating. [26][27][28][29] The RevIL state is in the form of an ammonium-carbamate ion pair, as shown in Figure 1, where this IL like state behaves very similarly to protic ILs. Silicon-based amines are utilized to substantially reduce the viscosity in the ionic state compared to its carbon analogs, and also for reducing the temperatures required for reversal from the RevIL to the ML state compared to its carbon analogs.…”

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confidence: 93%

Ionicity Analysis of Silylamine-Type Reversible Ionic Liquids as a Model Switchable Electrolyte

Jiménez

Jung

Biddinger

2015

J. Electrochem. Soc.

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Separation of the electrochemical product from an electrolyte can add challenges to the overall process. Use of a switchable electrolyte offers the possibility to reduce or eliminate these separation challenges while maintaining high conductivity. Reversible ionic liquids (RevILs) are a type of switchable solvent that could be used as a switchable electrolyte. Switchable solvents are solvents that can have dramatic step-changes in their properties with the introduction of an external stimulus, in this case CO 2 . In order to determine the feasibility of using TEtoxySA-RevIL, which behaves similarly to protic ionic liquids, as an electrolyte an ionicity analysis utilizing binary mixtures of the RevIL and organic solvents were studied to determine the ionic behavior of the system. Both protic and aprotic solvents with a broad range of dielectric constants were used in order to elucidate the ionicity of the RevIL mixtures. When in the pure RevIL state, the conductivity is prohibitively low due to a heightened viscosity and poor ion mobility due to hydrogen bonding and coulometric attraction. We found that in the presence of protic solvents with high dielectric constants the conductivity of the RevIL increased by up to four orders of magnitude and achieved ideal ionicity.

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“…RevILs behave in a dual capacity as solvents for CO 2 capture: (1) the chemisorption of CO 2 upon reaction of the molecular liquid to form RevIL and (2) by the physical absorption of the CO 2 . We reported the use of trimethoxy (TMSA), triethoxy (TESA), triethyl (TEtSA), and tripropyl (TPSA) silated propylamines for CO 2 capture (Blasucci et al [40,41]). The chemical capacities can be enhanced by the physisorption capabilities of the RevILs.…”

Section: Co 2 Capturementioning

confidence: 99%

Solvents for sustainable chemical processes

Pollet

Eckert

Liotta

2011

WIT Transactions on Ecology and the Environment

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Worldwide, socioeconomic strategies encourage -and may soon enforceindustrial sustainability. Therefore, innovative research and approaches must provide short and long term solutions to reach future legislative targets. For chemical processes, the development of solvents that facilitate reaction and subsequent product separation is paramount to secure economic competitivity while minimizing impact on the environment and energy consumption. Tunable and switchable solvents were developed to address synergistically reaction and separation. Tunable solvents change properties continuously upon application of an external stimulus. For example, organic aqueous solvents allow for the reaction to be homogeneously catalyzed followed by a simple and efficient heterogeneous separation of the product (commonly a heterogeneous catalysis attribute). Chemical processes mediated by water at or below the near critical range can also alleviate the shortcomings of current synthetic strategies (waste production and management, remediation costs). In contrast, switchable solvents change physical properties abruptly upon application of an external stimulus. Piperylene sulfone is one example and can provide a recyclable alternative for dipolar, aprotic solvents such as dimethylsulfoxide (DMSO). Solvents can accomplish more than heat and mass transfer; they can actively contribute to facilitate reaction and product separation while minimizing waste generation and energy consumption.

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Single component, reversible ionic liquids for energy applications

Cited by 91 publications

References 13 publications

Ionic Liquids: Synthesis and Applications in Catalysis

Ionic Liquids: Synthesis and Applications in Catalysis

Ionicity Analysis of Silylamine-Type Reversible Ionic Liquids as a Model Switchable Electrolyte

Solvents for sustainable chemical processes

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