A water harvesting device includes at least a first adsorption column including a first inlet, a first outlet, and a first interior region. A sorbent material is located within the first interior region of the first adsorption column. The sorbent material includes a metal organic framework (MOF) material including a plurality of metal ions or clusters of metal ions coordinated to one or more organic linkers, a plurality of nanofabrics comprising a hydrogel material, or a combination thereof.

The present disclosure generally relates to a microporous aerogel, processes for preparing a microporous aerogel, and applications for the microporous aerogel. The present disclosure also generally relates to an apparatus for capturing carbon dioxide from a gaseous stream or from the atmosphere, the apparatus comprising a microporous aerogel for selectively adsorbing and desorbing the carbon dioxide.

The present invention relates to a super-absorbent polymer having excellent properties, both centrifugal retention capacity (CRC) and absorption under pressure (AUP) having been improved by introducing a surface crosslinked layer crosslinked by surface-modified inorganic particles, and to a method for preparing the same. The super-absorbent polymer comprises: a base resin powder containing a crosslinked polymer of water-soluble ethylene-based unsaturated monomers having an at least partially neutralized acidic group; and a surface crosslinked layer formed on the base resin powder, wherein inorganic particles may be chemically bound to the crosslinked polymer contained in the surface crosslinked layer, via an oxygen-containing bond or a nitrogen-containing bond.

A method for selective removal of polycyclic aromatic hydrocarbons from oils obtained as a result of petroleum processing, including two separate processes: filtration through a porous carbon-containing bed comprising and filtration through microfiltration membranes. The method is particularly useful for purifying oils selected from unconverted oils obtained in hydrocracking processes, products of further processing of these oils, engine oil and used engine oil.

A carbon-based porous material microscopically exhibiting a three-dimension 1 cross-linked net-like hierarchical pore structure, a specific surface area of 500˜2,500 m.sup.2/g and a water contact angle greater than 90°. The surface of the carbon-based porous material has a through hierarchical pore structure with mesopores nested in macropores and micropores nested in mesopores, the content of mesopores is high, and there are more adsorption activity sites exposed on the surface of the material, so that the diffusion path for organic gas molecules in the adsorption process is shortened. At the same time, the absorption and desorption rates may also be accelerated and the desorption temperature may be lowered. Furthermore, benefits result for solving the desorption and recovery problems of organic gas molecules. Moreover, the defects of ordinary porous carbon materials being easily hygroscopic, having a weakened capacity to adsorb target gas molecules in a humid environment, etc. are further effectively solved.

The invention relates to a method to produce a particulate activated carbon material for capturing CO.sub.2 from air,

wherein the particulate activated carbon is impregnated with alkali carbonate salt such as K.sub.2CO.sub.3; and wherein the impregnated particulate activated carbon either has, determined using nitrogen adsorption methods, a pore volume of at least 0.10 cm.sup.3/g for pore sizes of at least 5 nm and a pore volume of at most 0.30 cm.sup.3/g for pore sizes of less than 2 nm or is based on a mixture of different alkali carbonate salts, or has a particular pore surface for pore sizes in the range of 2 nm-50 nm.

An adsorbent composition comprises a bismuth material, a promoter and optionally a support. The adsorbent composition is suitable for adsorbing an arsenic material, such as arsine, from a process stream.

The present invention provides an improved sorbent and corresponding device(s) and uses thereof for the capture and stabilization of volatile organic compounds (VOC) or semi-volatile organic compounds (SVOC) from a gaseous atmosphere. The sorbent is capable of rapid and high uptake of one or more compounds and provides quantitative release (recovery) of the compound(s) when exposed to elevated temperature and/or organic solvent. Uses of particular improved grades of mesoporous silica are disclosed.

Method for making a Zn MOF of formula Zn.sub.2Ht.sub.2CL, where Ht is 1,2,4-triazolate or a combination of 1,2,4-triazolate and one or more other cycloazocarbyl compound, and CL is oxalate or a combination of oxalate and one or more chelating ligand other than oxalate. More specifically, the Zn MOF is Zn.sub.2Tz.sub.2Ox, where Tz is 1,2,4-triazolate and Ox is oxalate. The method includes reacting 2 molar equivalents of 1,2,4-triazole or the combination with cycloazocarbyl compound with 1 molar equivalent of oxalate or the combination with other chelating ligand and adding 2 molar equivalents of Zn.sup.2+ to form the Zn MOF. The solvent used can be a lower alcohol or a miscible mixture of water and a lower alcohol. One or both reaction steps are conducted at a temperature less than or equal to 120° C. and can be conducted at room temperature and ambient pressure.

A carbon adsorbent storage and dispensing system is provided with a structurally modified particulate carbon adsorbent designed with optimal volumetric surface area for a certain range of particle sizes. Bulk density and specific surface area are carefully balanced to ensure the volumetric surface area remains within an optimal range to create high performance, as measured by dispensing capacity of the dopant fluid that is reversibly adsorbed onto the structurally modified particulate carbon adsorbent.