Embodiments of the present disclosure pertain to methods of sorption of H.sub.2O from an environment by associating the environment with a porous material such that the association results in the sorption of H.sub.2O to the porous material. The porous material includes a (M)-2,4-pyridinedicarboxylic acid coordination polymer, where M is a divalent metal ion selected from the group consisting of Mn, Fe, Co, Ni, Mg, and combinations thereof. The coordination polymer has a one-dimensional pore structure and shows reversible soft-crystal behavior. The porous material may be a Mg(II) 2,4-pyridinedicarboxylic acid coordination polymer (i.e., Mg-CUK-1). The methods of the present disclosure may also include one or more steps of releasing the sorbed H.sub.2O from the porous material and reusing the porous material after the releasing step for sorption of additional H.sub.2O from the environment.

The present disclosure relates to thermo-responsive hydrogel composite (TRHC) desiccants having high adsorption capacities, fast adsorption/desorption rates, and low regeneration temperatures (T.sub.reg) compared to traditional desiccants. In some embodiments of the present disclosure, TRHC desiccants may be synthesized by freeze drying. In some embodiments of the present disclosure, the porous structures resulting from freeze drying copolymers of thermo-responsive polymers and/or hygroscopic agents may be combined with hygroscopic inorganic salts, resulting in TRHC desiccants having superior performance properties.

The disclosure relates to membranes and membranes systems for the separation of trace components in a fluid mixture.

The disclosure relates to membranes and membranes systems for the separation of trace components in a fluid mixture.

An object of the present invention is to provide an adsorbent, a filter medium, and an air filter that have good aldehyde removal performance that undergoes little deterioration over time, where the adsorbent is one in which an inorganic porous medium supports at least an amine-based compound and a compound having a sulfide group as a functional group.

An object of the present invention is to provide an adsorbent, a filter medium, and an air filter that have good aldehyde removal performance that undergoes little deterioration over time, where the adsorbent is one in which an inorganic porous medium supports at least an amine-based compound and a compound having a sulfide group as a functional group.

The invention discloses a humic acid type adsorption material as well as a preparation method and application thereof. The humic acid type adsorption material is prepared by taking carboxymethyl cellulose or salts thereof, humate and montmorillonite as raw materials and adding a monomer, a cross-linking agent and an initiator through aqueous solution polymerization. The synthesized porous material is great in specific surface area, can quickly get close to water molecules in water to form hydrogen bonds, and finally achieves the purpose of removing organic dye pollutants through electrostatic attraction effect with dye molecules. The humic acid type adsorption material is low in raw material price, is simple in synthesis process, and is green and environmentally friendly.

The present application relates to absorbents comprising tetraamine ligands grafted onto metal-organic frameworks and a method for using same for CO2 capture from fossil fuel combustion sources to reduce emissions. In particular, this application relates to capturing >90% by volume, preferable >99% by volume, CO2 emissions such that the emissions are negative, essentially removing CO2 from the combustion air.

In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1: [X](W).sub.a(Q).sub.b(T).sub.c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05≤(b/c)≤100, and a≥0.

In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1: [X](W).sub.a(Q).sub.b(T).sub.c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05≤(b/c)≤100, and a≥0.