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.

A carbon dioxide adsorbent including silica gel and an amine compound carried by the silica gel. The silica gel has a spherical shape, a particle size ranging from 1 mm to 5 mm inclusive, an average pore diameter ranging from 10 nm to 100 nm inclusive, a pore volume ranging from 0.1 cm.sup.3/g to 1.3 cm.sup.3/g inclusive, and a waterproof property N that is defined by an expression (1) and that is not lower than 45%,
N=(W/W.sub.0)×100  (1) where N is the waterproof property in percentage (%) of the silica gel, W.sub.0 is a total number of particles of the silica gel immersed in water, W is a number of particles of the silica gel not subjected to breakage out of W.sub.0.

The present disclosure provides a porous silica having an average pore diameter of at least 210 Å and a pore volume of at least 0.80 cm.sup.3g.sup.−1. The present disclosure also provides a method of producing the porous silica including gelling a liquid phase-dispersed nanoparticulate silica in the presence of either (i) a Brønsted acid and an amine group having two or more primary or secondary amine groups or (ii) an amino acid.

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.

A functional material is provided and includes a porous carbon material derived from a plant-derived material as a raw material, wherein a bulk density of the porous carbon material is in a range of 0.2 grams/cm.sup.3 to 0.4 grams/cm.sup.3, and wherein a value of an ignition residue of the porous carbon material ranges from 0.1 mass % to 20 mass %.

A natural gas storage material is provided that comprises a porous metal-organic framework (MOF) material having one or more sites for reversibly storing natural gas that contains methane. In certain variations, the MOF has a usable methane storage capacity of greater than or equal to about 208 cm.sup.3(STP)/cm.sup.3 under pressure swing conditions of 80 bar adsorption to 5 bar desorption at 298 K. In other variations, suitable MOFs having one or more sites for reversibly storing methane with advantageous natural gas storage capabilities are selected from the group consisting of: UMCM-152, DUT-23-Cu, VEBHUG_SL, FUYCIN, ja074366osi20070816_031204, XIYYEL, cg500192d_si_003, VUSKAW, VUSKEA, PEVQOY, EDUSIF, and combinations thereof. Natural gas storage systems and methods of reversibly storing natural gas in such MOFs are also provided.

Immobilized diluents in a smoking article are provided, wherein diluents can be immobilized through absorption and/or adsorption of the diluents into immobilizing materials, such as sorbents like silica gels. By immobilizing diluents, the diluents can be available for vaporization, while still being protected from migration and/or loss of the diluents in a smoking article.

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.

A series of isoreticular metal-organic frameworks composed of metal nodes connected by rigid trigonal prismatic organic linkers and having a 6,12-coordinatled alb network topology are provided. Also provided are methods of synthesizing the metal-organic frameworks and methods of using the metal-organic frameworks to catalyze the hydrolysis of organic molecules, such as nerve agents, having hydrolysable bonds.

Disclosed are embodiments of a filter unit containing a water adsorbent material in the form of water adsorbent particles in a packed bed and a gas adsorbent material in the form of gas adsorbent particles in a packed bed. In embodiments, the gas adsorbent material is downstream from the water adsorbent material in a direction of operation. Further disclosed are methods of preparing and using the filter units.