High Surface Area Nanoporous Polymers for Reversible Hydrogen Storage

Abstract

Hydrogen adsorption using a series of nanoporous synthetic polymers has been studied. Promising results were obtained during the screening of commercially available porous polymer beads; of the polymers considered, hypercrosslinked Hypersol-Macronet MN200 resin exhibited the highest adsorption capacity for hydrogen. This initial success triggered the development of our own high surface area hypercrosslinked materials. Subjecting gel-type and macroporous vinylbenzyl chloride-based precursors swollen in dichloroethane to a Friedel−Crafts reaction catalyzed by iron trichloride afforded beads with surface areas of 1 930 and 1 300 m2/g, respectively, as calculated using the BET equation. The former polymer reversibly stores up to 1.5 wt % H2 at a pressure of 0.12 MPa and a temperature of 77.3 K. The initial heat of adsorption of hydrogen molecules onto this polymer is 6.6 kJ/mol.

Zr-Fumarate MOF a Novel CO2-Adsorbing Material: Synthesis and Characterization

“…CO 2 capture on solid sorbents such as metal oxides, zeolites, functionalized silicas, and carbon have drawn interest (Lee et al, 2002;Lin et al, 2009;Zhao et al, 2010). In addition, porous polymers with intrinsic microporosity and covalent organic polymers have gained attention due to their high surface area and CO 2 -capturing capacity (Budd et al, 2004;Germain et al, 2006;Liu et al, 2008;Ghanem et al, 2010;Bezzu et al, 2012). Metalorganic frameworks (MOFs) or porous coordination polymers are a class of novel materials constructed by metal and an organic ligand through a strong coordination bond.…”

Polymeric molecular sieve membranes via in situ cross-linking of non-porous polymer membrane templates

“…A number of MOPs have been synthesized through various coupling reactions including crystalline polymers such as covalent organic frameworks, amorphous polymers such as polymers of intrinsic microporosity and conjugated microporous polymers [20][21][22][23][24][25][26][27] . Hypercross-linked polymers represent a new class of porous materials that are prepared mainly by a Friedel-Crafts alkylation reaction [28][29][30] . The permanent porosity in hypercross-linked polymers is a result of extensive cross-linking reactions, which prevent the polymer chains from collapsing into a dense, non-porous state [31][32][33] .…”

Why is the nanoscale special (or not)? Fundamental properties and how it relates to the design of nano-enabled drug delivery systems

“…Lower pressures are needed for the condensation at higher extents of adsorption as seen for N 2 at 77.4K [129] . polymers compared to the microporous equivalents [132] . Therefore, the contribution of capillary adsorption to moisture sorption becomes very significant in nanocapillaries [133] , especially where interactions between the liquid-solid interface are stronger than the liquid-liquid interface interactions [134] .…”