Ship in a bottle synthesis of ionic liquids in NaY supercages for CO2 capture

Abstract

CO 2 is the single most important anthropogenic greenhouse gas, contributing $64% to the global radiative forcing. And the rising concentration of CO 2 in the atmosphere will result in global climate change. In this study, 1-alkyl-3-methylimidazolium bromide ionic liquids (ILs) ([C n MIM]Br, n ¼ 4, 6, 8, 10) were ship in a bottle synthesized in NaY zeolite to get [C n MIM]Br@NaY samples and applied for CO 2 capture. These samples were then characterized by elemental analysis, thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and FT-Raman spectra. The results indicated that [C n MIM]Br ILs were successfully encapsulated inside NaY and the encapsulated [C n MIM]Br ILs were much more stable than their bulk analogues. And Raman spectra showed that the relative intensities of some peaks in the [C n MIM]Br@NaY samples had good relationships with the side chain length of ILs. Then the breakthrough curves were recorded to evaluate the CO 2 adsorption capacity of these samples, and indicated that the highest adsorption capacity could reach up to 20.08 mL CO 2 per g [C 4 MIM]Br@NaY. And the cyclic CO 2 adsorption results also illustrated that the [C n MIM]Br@NaY samples were stable and effective with prolonged use. So these samples could be potential materials for CO 2 capture.

Synthesis of Ionic Liquid-SBA-15 Composite Materials and Their Application for SO2 Capture from Flue Gas

“…16,17 While encouraging results have been realized with the use of bulk ILs, their poor mass/heat transfer characteristics, low surface area, and associated cost make their industrial use challenging. 18,19 In an effort to resolve these issues, a number of studies have been devoted to the preparation and use of supported ILs. Zhao et al found that supporting ether functionalized imidazolium-based ILs on porous silica gel led to a significant improvement of the composites SO 2 adsorption properties compared to the bulk.…”

“…The resulting adsorbent was found to possess superior thermal stability and improved cyclic CO 2 adsorption−desorption performance compared to the bulk ILs. 18 [APMIM]Br-NaY prepared by the same approach was also found to be a suitable material for CO 2 adsorption. It was determined to possess both physisorbed and chemisorbed ILs, while exhibiting suitable cycling stability at 200 °C.…”

Ionic liquid@MIL-101 prepared via the ship-in-bottle technique: remarkable adsorbents for the removal of benzothiophene from liquid fuel

“…Therefore, the efficiency of the IL-based porous materials will be evaluated in terms of stability of ILs in porous structures and their efficiency in applications after recycle. To date, several approaches have been reported on the preparation of IL-based and stable porous materials (e.g., zeolite-based structures), including the ship-in-bottle (SIB), 7,8 ionothermal, 1,9 and postimpregnation [1][2][3][4] methods. The SIB approach is rather impressive and has successfully been applied in the syntheses of stable heteropoly acid (HPA) 10 and metal complexes 11,12 in inorganic porous materials, such as silicalite-1, SBA-15, and MCM-41.…”

Unique allosteric effect-driven rapid adsorption of carbon dioxide in a newly designed ionogel [P4444][2-Op]@MCM-41 with excellent cyclic stability and loading-dependent capacity

“…More importantly, although its loading is very low, the adsorption performance of ionogel PM-5 at ℃ is fairly competitive with newly reported ionogels with high loading up to 10% -50% (Table S2). 30,[37][38][39][40] With gradually further loading IL up to 30%, the adsorption capacities of PM-10, PM-15 and PM-30 inversely lower to 1.03, 0.90, and 0.57 mmol•(g-Ionogel) -1 respectively ( Fig. 7(e, f, and g) and Fig.…”

“…10,[25][26][27][28] In order to make full use of the expensive ILs for CO2 capture, an important strategy is to immobilize or load ILs by incorporation into porous solids to obtain composites called "ionogels". [29][30][31][32] Synergistic effect of ionogels are expected to enhance the efficiency of CO2 adsorption basing on the enlarged interface of gas-liquid. 33 It is reported that the room temperature IL show strong interfacial layering at the support.…”