Ship-in-a-bottle synthesis of amine-functionalized ionic liquids in NaY zeolite for CO2 capture

Abstract

CO2 capture on solid materials possesses significant advantages on the operation cost, process for large-scale CO2 capture and storage (CCS) that stimulates great interest in exploring high-performance solid CO2 adsorbents. A ship-in-a-bottle strategy was successfully developed to prepare the [APMIM]Br@NaY host–guest system in which an amine-functionalized ionic liquid (IL), 1-aminopropyl-3-methylimidazolium bromide ([APMIM]Br), was in-situ encapsulated in the NaY supercages. The genuine host-guest systems were thoroughly characterized and tested in CO2 capture from simulated flue gas. It was evidenced the encapsulated ILs are more stable than the bulk ILs. These host–guest systems exhibited superb overall CO2 capture capacity up to 4.94 mmol g−1 and the chemically adsorbed CO2 achieved 1.85 mmol g−1 depending on the [APMIM]Br loading amount. The chemisorbed CO2 can be desorbed rapidly by flushing with N2 gas at 50°C. The optimized [APMIM]Br@NaY system remains its original CO2 capture capacity in multiple cycling tests under prolonged harsh adsorption-desorption conditions. The excellent physicochemical properties and the CO2 capture performance of the host-guest systems offer them great promise for the future practice in the industrial CO2 capture.

Ionic Liquid/Metal–Organic Framework Composites for H2S Removal from Natural Gas: A Computational Exploration

“…30 To overcome these drawbacks, a new strategy named supported ILs (SILs) has been proposed, 31,32 where ILs were encapsulated into porous solids to improve separation efficiency. 33 During the past decades, metal-organic frameworks (MOFs) have attracted tremendous attention due to their many unique properties such as high surface area, large pore volume and designable structure. [34][35][36][37][38] Some experimental and theoretical studies have shown that MOFs could be used as potential porous supporter for ILs.…”

Kinetics and mechanisms of adsorption/desorption of the ionic liquid 1‐buthyl‐3‐methylimidazolium bromide into mordenite

“…IL confined in pores of a zeolite is generally stabilized presenting a higher decomposition temperature in TGA. 4 When comparing thermograms of adsorption in H-MOR and NH 4 -MOR, Fig. 2(b) dashed line shows that H-MOR only contains water in its pores since only one weight loss between 25 and 250 ∘ C is observed in the thermogram.…”

“…This latter weight loss can be related to IL decomposition. IL confined in pores of a zeolite is generally stabilized presenting a higher decomposition temperature in TGA …”

“…1,3-dialkylimidazolium, N-alkylpyridinium, tetraalkylammonium and tetraalkylphosphonium, paired with a variety of anions that have a strongly delocalized negative charge (e.g. BF 4 − , PF 6 − , SbF 6 − , triflate, halides, etc. ), resulting in liquid substances with very interesting properties as solvents.…”

“…1 Moreover, there is a growing interest in encapsulating ionic liquids into porous substances, including zeolites, to be used as novel catalysts 2,3 or for CO 2 capture. 4 The application of ILs as solvents resides in their negligible vapour pressure and excellent thermal stability. In this regard ILs have been intensively investigated in the past few years for the conversion of sugars to 5-hydroxymethylfurfural (5-HMF) using various catalysts and conditions.…”