Abstract
Solid porous materials, like zeolites, have been widely used in a variety of fields such as size-and-shape-selective absorption/separation and catalysis because of their porosity. However, there are few liquid materials that exhibit permanent porosity. Porous liquids are a novel material that combine the properties of fluidity and permanent porosity. They have potential applications in many fields such as gas separation, storage and transport. Herein, we report a novel Type 1 porous liquid prepared based on silicalite-1. The pore size of this porous liquid was determined by positron annihilation lifetime spectroscopy (PALS), and the CO2 capacities were determined by the intelligent gravimetric analyzer (IGA). The unique properties of this porous liquid can promote its application in many fields such as gas storage and transport.
Highlights
A family of microporous aluminosilicates characterized by a regular system of inner channels and uniform open pores [1,2], have been widely used in size-and-shape-selective absorption/separation [3,4,5,6,7,8,9,10,11] and catalysis [12,13,14,15] due to their sharp pore size distribution, large surface area and thermal/hydrothermal stability
One way to solve this problem is by liquefiying the zeolites into porous liquids that combine the properties of fluidity and permanent porosity
We have reported a class of Type 3 porous liquids synthesized by solution mixing of porous hosts (ZIF-8, ZSM-5 and Silicalite-1) and rationally designed ionic liquids [19]
Summary
A family of microporous aluminosilicates characterized by a regular system of inner channels and uniform open pores [1,2], have been widely used in size-and-shape-selective absorption/separation [3,4,5,6,7,8,9,10,11] and catalysis [12,13,14,15] due to their sharp pore size distribution, large surface area and thermal/hydrothermal stability. When zeolites are used as adsorbents, they have high adsorption capacity and selectivity for a variety of gases such as He [4], CO2 [7], O2 [10], N2 , CH4 , C2 H6 [11] and so on As solid adsorbents, they have many advantages, such as lower energy penalties in adsorption-desorption cycles, but they are difficult to apply in conventional liquid processes because of their solid properties [16,17]. Dai’s group had reported a Type 1 porous liquid using hollow silica spheres as hosts (denoted by OS@HS) and determined the gas separation for N2 /CO2 [18]. The CO2 capacity measurements confirm the permanent porosity in these liquids These liquids have potential applications in many fields such as gas separation, storage and transport. The compound was characterized by Fourier-transform infrared infrared (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), N2.
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