Reversible CO₂capture with porous polymers using the humidity swing

Abstract

Several polymeric materials were prepared for reversible CO 2 capture. These materials contain quaternary ammonium ions and hydroxide counter ions, including polymers grafted from carbon black, crosslinked porous polymers templated by ordered colloidal crystals, and high internal phase emulsion systems. The porous polymers displayed an order of magnitude improvement in the kinetics of the absorption and desorption processes and a significant improvement in the swing sizes compared to a commercially available material with similar functional groups. This work suggests a new direction for the design of porous polymeric materials for CO 2 air capture.

Synthesis and properties of polystyrene-based polyHIPEs reinforced with quadruple hydrogen bond functionality

“…These hierarchically porous materials, known as polyHIPEs, have huge amount of voids and windows (or throats, the small pores connecting the neighbor voids) by removal of the internal phase. PolyHIPEs have advantages such as high permeability, easy preparation, facile control of voids and windows size, etc., which are being considered for myriad applications such as in filtration media for separation [4][5][6][7][8], support for catalyst [9][10][11], scaffold for tissue engineering [12][13][14][15][16][17][18], adsorbent for scavenging [19][20][21][22][23][24][25][26] and storage for hydrogen [27,28].…”

Low-carbon production of hydrogen from fossil fuels

“…The search for efficient CO 2 capture materials is of great commercial interest, and it has been a focus of intensive research and development (R&D) for many decades, which has recently intensified owing to the development of commercial CCS systems. A large variety of materials are suitable for CO 2 capture: zeolites, amines, activated carbons (AC), alkali and alkaline earth metal oxides, ionic liquids, polymeric membranes, microporous polymers, amine-modified mesoporous silica, metal-organic frameworks (MOF), and so forth (He et al, 2013;Brennecke and Gurkan, 2010). The most important characteristics determining the suitability of CO 2 capture materials are:…”

New Poly(Vinylbenzylchloride/Divinylbenzene) Adsorbent for Carbon Dioxide Adsorption. II. Effect of Amine Functionalization

“…When they were loaded with amines, there was a potential blockage of the amine group in the pores as well as a diffusion limitation of gas in the adsorbents [16]. The use of a larger pore adsorbent may help to promote the transport of feed gas throughout the adsorbent [17]. He et al [17] produced a polymer by a technique called high internal phase emulsion (HIPE), which was further modified with a quaternary ammonium hydroxyl group for CO 2 adsorption.…”

“…The use of a larger pore adsorbent may help to promote the transport of feed gas throughout the adsorbent [17]. He et al [17] produced a polymer by a technique called high internal phase emulsion (HIPE), which was further modified with a quaternary ammonium hydroxyl group for CO 2 adsorption.…”