A composite adsorbent for adsorbing water includes a silica-cage having plural pores and internal channels that fluidly connect the plural pores, at least one interior chamber having an average diameter larger than an average diameter of the plural pores, wherein the at least one interior chamber is a result of a collapse of at least one pore of the plural pores and one channel of the internal channels, and a salt provided within the plural pores, the internal channels and the at least one interior chamber.

The present invention provides novel chromatographic materials. e.g., for chromatographic separations, processes for their preparation and separations devices containing the chromatographic materials. The chromatographic materials of the invention have controlled porosity and comprise a chromatographic core material and one or more layers of chromatographic surface material which each independently provide an average pore diameter, an average pore volume, or a specific surface area such that the combined layers form a chromatographic material having a predetermined or desired pattern of porosity from the core material to the outermost surface. The materials are useful for HPLC separations, normal-phase selarations, reversed-phase separations, chiral separations, HILIC separations, SFC separations, affinity separations, perfusive separations, partially perfusive separations, and SEC separations.

A capillary column includes a fused silica tubing and a polyimide coating over the fusing silica tubing. Additionally, the capillary column further includes a first plurality of integrated ferrules positioned along at least a first portion of the fused silica tubing and spaced apart from one another by a first fixed interval.

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for their preparation and separations devices containing the chromatographic materials. The preparation of the inorganic/organic hybrid materials of the invention wherein a surrounding material is condensed on a superficially porous hybrid core material will allow for families of different hybrid packing materials to be prepared from a single core hybrid material. Differences in hydrophobicity, ion-exchange capacity, chemical stability, surface charge or silanol activity of the surrounding material may be used for unique chromatographic separations of small molecules, carbohydrates, antibodies, whole proteins, peptides, and/or DNA.

A method for removing carbon dioxide directly from ambient air, using a sorbent under ambient conditions, to obtain relatively pure CO.sub.2. The CO.sub.2 is removed from the sorbent using process heat, preferably in the form of steam, at a temperature in the range of not greater than about 130 C., to capture the relatively pure CO.sub.2 and to regenerate the sorbent for repeated use. Increased efficiency can be achieved by admixing with the ambient air, prior to contacting the sorbent, a minor amount of a preferably pretreated effluent gas containing a higher concentration of carbon dioxide. The captured carbon dioxide can be stored for further use, or sequestered permanently. The above method provides purified carbon dioxide for further use in agriculture and chemical processes, or for permanent sequestration.

An apparatus for fabricating a graphene membrane includes a first section having a first fluid chamber for housing a suspension of graphene platelets in a fluid. A second section is positionable adjacent the first section. The second section has a second fluid chamber and a porous support housed in the second fluid chamber for supporting a porous substrate. When the first section is positioned adjacent to the second section and the porous substrate is supported by the porous support, the first fluid chamber and the second fluid chamber are in fluid communication via the porous substrate. The apparatus further includes a pressurizer for creating a pressure differential between the first fluid chamber and the second fluid chamber and thereby forcing the fluid through the porous substrate and into the second fluid chamber and lodging the graphene platelets in the pores of the porous substrate.

Disclosed is a permeation membrane and a method for producing a permeation membrane. The permeation membrane can be used in particular in the field of membrane-based material separations. The permeation membrane is composed of an inorganic semi-permeable substance in which an additional substance is incorporated in some locations such that existing intermediate spaces in the semi-permeable substance are at least partly filled by the additional substance and thus only the intermediate spaces are blocked for a permeating species.

A capillary column includes a fused silica tubing and a polyimide coating over the fusing silica tubing. Additionally, the capillary column further includes a first plurality of integrated ferrules positioned along at least a first portion of the fused silica tubing and spaced apart from one another by a first fixed interval.

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.

An adsorbent article for CO.sub.2 capture and methods of making the same. The adsorbent article for CO.sub.2 capture includes a ceramic substrate, a plurality of inorganic support particles, and an organic CO.sub.2 sorbent on the support particles. The ceramic substrate includes a plurality of porous partitions walls that define a plurality of open channels extending from an inlet end to an outlet end of the ceramic substrate. The organic CO.sub.2 sorbent is supported by the inorganic support particles within the pores of porous partition walls of the ceramic substrate. The surfaces of the porous partition walls surfaces defining the open channels are essentially free of the organic CO.sub.2 sorbent.