State of the art of ionic liquid‐modified adsorbents forCO₂capture and separation

Abstract

The enormous emission of carbon dioxide (CO 2 ) from industries has triggered a series of environmental issues. In recent years, ionic liquids (ILs) as novel absorbents are widely used for CO 2 capture owing to their low vapor pressure and tunable structures. IL-modified adsorbents have the advantages of both ILs and porous supports, such as high CO 2 selectivity and high specific surface area, which are novel agents to capture CO 2 with broad application prospects. In this review, more than 140 IL-modified adsorbents for CO 2 capture in recent years were systematically summarized. The types of ILs including conventional ILs and functionalized ILs on CO 2 separation performance of different IL hybrid adsorbents, and their adsorption mechanisms were also discussed. Finally, future perspectives on IL-modified adsorbents for CO 2 separation were further posed.

Generalizing property prediction of ionic liquids from limited labeled data: a one-stop framework empowered by transfer learning

“…In this work, the character-level tokenization 40,42 is used for the sake of model simplication where every single character appearing in the SMILES is tokenized separately. The vocabulary is built by using the MXNet library 55 and the GluonNLP toolkit, 56 which contain all 71 possible characters in the SMILES of 9 434 070 molecules in the pre-training dataset. The characters as well as their indexes in the vocabulary are detailed in the ESI (Note 3 †).…”

“…The melting point, viscosity, thermal decomposition temperature, toxicity, and heat capacity of ILs should be considered as constraints because all these properties determine the feasibility and suitability of ILs as absorbents. [55][56][57] To be specic, the melting point limits the lowest absorption temperature of ILs as liquid CO 2 absorbents; the thermal decomposition temperature limits the highest temperature for CO 2 desorption; the energy consumption of solvent regeneration can be assessed from the heat capacity of IL; the toxicity is a key factor related to the potential EHS impacts of ILs. All the above properties can be covered by the ILTransR developed in this work.…”

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO2 Separation

“…At present, a massive number of CO 2 capture technologies have been proposed such as amine scrubbing, the adsorption method by porous materials, and membrane separation technology. 4,5 Ionic liquids (ILs) were promising candidates due to good CO 2 affinity, negligible volatility, and tunable structures. 6−9 However, the high viscosity of the functionalized ILs limited the CO 2 transportation.…”

“…However, the increasing concentration of CO 2 in the atmosphere has caused serious environmental problems such as global warming that cannot be ignored. , To reduce carbon emissions, the development of a novel CO 2 capture technology is particularly critical. At present, a massive number of CO 2 capture technologies have been proposed such as amine scrubbing, the adsorption method by porous materials, and membrane separation technology. , …”

Aromatic volatile organic compounds absorption with phenyl‐based deep eutectic solvents: A molecular thermodynamics and dynamics study

“…Over a few decades, ionic liquids (ILs) as a type of tunable solvent have received an extensive attention to focusing on chemical separation fields, [26][27][28] such as CO 2 capture, [29][30][31] NH 3 , 32 H 2 S and SO 2 absorption, 31 and solvent extraction due to their unique physicochemical properties like negligible volatility and high solubility and selectivity to specific gases compared to conventional absorbents. There are some researches on using ILs to absorb VOCs, 33,34 for example, the IL [EMIM][Tf 2 N] which can effectively absorb benzene, toluene, and pxylene.…”