Separating oxygen from a gas includes contacting an oxygen-selective sorbent with a gas stream, adsorbing oxygen in the gas stream with the sorbent, heating the sorbent to greater than 400° C., and desorbing a majority of the oxygen. The sorbent is selective for oxygen, and adsorbing occurs at a temperature between 275-325° C. An oxygen separation system includes a sorption bed, a heater configured to heat the sorption bed, an oxygen analyzer, a first conduit configured provide an input gas to the sorption bed, a second conduit configured to provide processed input gas from the sorption bed to the oxygen analyzer, a third conduit configured to provide a purge gas to the sorption bed, and a fourth conduit configured to provide processed purge gas to the oxygen analyzer. The first and third conduits are configured to flow the input gas and the purge gas flow in opposite directions through the sorption bed.

The present invention is to provide a novel adsorbent which is low in cost, has versatility and high adsorption ability. Specifically, the present invention is to provide an adsorbent of a specific metal element containing a metal salt of a cyanometallic acid, a method for producing the same, and a method for removing the ion of the element that is the target of adsorption using such an adsorbent.

A NO.sub.x adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NO.sub.x adsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NO.sub.x storage material.

Methods for purifying biological macromolecules are provided. Aspects of the subject methods include contacting the biological macromolecule with an exemplary hydroxamate affinity tag to produce a tagged moiety followed by purification of the tagged moiety by immobilized metal affinity chromatography (IMAC). Also provided are kits comprising an exemplary subject hydroxamate affinity tag, an IMAC resin and a metal ion configured for loading onto the resin, wherein the metal ion is capable of binding to a compound containing the hydroxamate affinity tag.

An adsorption method adsorbs a substance by using a tube-shaped apatite crystal. The apatite crystal may be a monocrystal given by a general formula M.sup.2.sub.5(PO.sub.4).sub.3X (M.sup.2 denotes at least one element selected from the group consisting of divalent alkali earth metal and Eu, and X denotes at least one element or molecule selected from the group consisting of halogen element and OH). The outer form of the apatite crystal may be a hexagonal prism in which the aperture of a hole formed on a top surface or bottom surface of the hexagonal prism may be hexagonal.

A hydrocarbon adsorbent includes a core-shell particle including a core and a shell surrounding the core, wherein the core includes ion-exchanged zeolite that is ion-exchanged with a metal other than silicon (Si) and aluminum (Al) and the shell includes a mesoporous metal oxide.

A material for separating and pumping oxygen is disclosed. The material is a zeolite doped with a chemical element having an electron density of between 30 kJ/mol and 150 kJ/mol. The material is configured for controllable oxygen desorption between 150° C. and 300° C. and pumping the released oxygen into an area having an ambient pressure of less than 100 pascals.

Systems and methods for separating hydrocarbons on an internal combustion powered vehicle via one or more metal organic frameworks are disclosed. Systems and methods can further include utilizing separated hydrocarbons and exhaust to generate hydrogen gas for use as fuel. In one aspect, a method for separating hydrocarbons can include contacting a first component containing a first metal organic framework with a flow of hydrocarbons and separating hydrocarbons by size. In certain embodiments, the hydrocarbons can include alkanes.

The present invention relates to a process for the detection and adsorption of arsenic from ground water and industrial waste water using lanthanide doped nanoparticles. More particularly, the present invention provides a process for the detection and adsorption arsenic in ppm level using Eu.sub.0.05Y.sub.0.95PO.sub.4 nanoparticles.

NO.sub.x abatement compositions include cobalt oxide (Co.sub.3O.sub.4) doped with cerium, and have an overall formula Co.sub.3-xCe.sub.-O.sub.4, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NO.sub.x abatement compositions possess NO.sub.x storage and NO.sub.x direct decomposition activity. Dual stage NO.sub.x abatement devices include an upstream portion having the NO.sub.x abatement composition to adsorb and store NO.sub.x at low temperature, and then release the NO.sub.x at higher temperature to a downstream catalytic conversion portion.