The invention relates to a method for removing polyfluorinated organic compounds from water by means of an adsorbent and to the regeneration of the latter. According to the invention, at least one zeolite is used as an adsorbent, which is brought into contact with the water and is then regenerated by wet-chemical oxidation, wherein the oxidation is carried out by means of UV irradiation and/or at a pH in the range from pH 2.5-7.5.

Water is separated into deuterium-depleted water having a low deuterium concentration and deuterium-enriched water having a high deuterium concentration easily and at low cost. A method for separating water into deuterium-depleted water and deuterium-enriched water, the method including: adsorbing water vapor on an adsorbent including a pore body having pores 6 while supplying water vapor to and allowing the water vapor to pass through the adsorbent for a predetermined period of time; recovering deuterium-enriched water containing a large amount of heavy water 8 from the water vapor not adsorbed on the adsorbent; and then recovering deuterium-depleted water containing a large amount of light water 7 from the water vapor adsorbed on the adsorbent.

The present invention provides a process for capturing CO.sub.2 from a gas stream, the process at least comprising the steps of: (a) providing a CO.sub.2-containing gas stream; (b) contacting the gas stream as provided in step (a) in an adsorption zone with solid adsorbent particles thereby obtaining CO.sub.2-enriched solid adsorbent particles (c) passing CO.sub.2-enriched solid adsorbent particles as obtained in step (b) from the bottom of the adsorption zone to the bottom of a first desorption zone; (d) removing a part of the CO.sub.2 from the CO.sub.2-enriched solid adsorbent particles in the first desorption zone, thereby obtaining partly CO.sub.2-depleted solid adsorbent particles and a first CO.sub.2-enriched gas stream; (e) passing the partly CO.sub.2-depleted solid adsorbent particles as obtained in step (d) via a riser to a second desorption zone; (f) removing a further part of the CO.sub.2 from the partly CO.sub.2-depleted solid adsorbent particles in the second desorption zone thereby obtaining regenerated solid adsorbent particles and a second CO.sub.2-enriched gas stream; and (g) recycling regenerated solid adsorbent particles as obtained in step (f) to the adsorption zone of step (b); wherein the second desorption zone is located above the adsorption zone.

The invention relates to strong hydrogen-bond acidic sorbents. The sorbents may be provided in a form that limits or eliminates intramolecular bonding of the hydrogen-bond acidic site between neighboring sorbent molecules, for example, by providing steric groups adjacent to the hydrogen-bond acidic site. The hydrogen bond site may be a phenolic structure based on a bisphenol architecture. The sorbents of the invention may be used in methods for trapping or detecting hazardous chemicals or explosives.

An apparatus for capturing a water content from a water containing gas, the apparatus comprising: a housing having an inlet into which the water containing gas can flow; a water adsorbent located in the housing, the water adsorbent comprising at least one water adsorbent metal organic framework composite capable of adsorbing a water content from the water containing gas; and a water desorption arrangement in contact with and/or surrounding the water adsorbent, the water desorption arrangement being selectively operable between (i) a deactivated state, and (ii) an activated state in which the arrangement is configured to apply heat, a reduced pressure or a combination thereof to the water adsorbent to desorb a water content from the water adsorbent.

A gas separation process in which the thermal storage of the heat in the gas is desired as well as the gas separation. This invention outlines a novel process and system whereby the thermal storage efficiency can be vastly increased by matching the gas sorption fronts and the thermal fronts to cause thermal front sharpening. The gas separation process and system include an adsorption vessel having an adsorbent in an amount of 10-40% and a thermal storage component in an amount of 50-90% by volume.

A method of capturing water from a composition comprising water or water vapour using a hybrid ultramicroporous material. The method comprises the steps of: (a) providing a hybrid ultramicroporous material of formula [M(L)a(X)b]; and (b) contacting the hybrid ultramicroporous material with the composition comprising water to capture water into the hybrid ultramicroporous material; The hybrid ultramicroporous materials used in the method of the present invention have fast kinetics of water uptake and high working capacity compared to known commercial sorbent materials. The method of the present invention may be used in water capture and purification processes to provide fresh water suitable for drinking or for use in agriculture. The method of the present invention may also be used to remove water as a contaminant or for use in dehumidification processes. A use of such a hybrid ultramicroporous material and a device for capturing water are also disclosed.

Methods and apparatuses for manufacturing portions of absorbent articles may include or facilitate conveying a substrate through a nip formed between a first device and a second device, transmitting vibrational energy from the second device toward the first device via the nip to alter the substrate, and cooling the second device by transferring thermal energy from the second device.

A carbon dioxide recovery system, which is configured to separate and recover carbon dioxide from a carbon dioxide containing gas, includes an adsorption unit that includes an adsorbent material that is configured to adsorb and desorb the carbon dioxide. The adsorbent material is configured to radiate heat in response to adsorption of the carbon dioxide and is configured to absorb the heat in response to desorption of the carbon dioxide. The adsorption unit is one of a plurality of adsorption units, and adjacent two adsorption units among the plurality of adsorption units contact with each other. When one of the adjacent two adsorption units adsorbs the carbon dioxide, another one of the adjacent two adsorption units desorbs the carbon dioxide.

Provided is the use of a carboxylate compound as an absorbent for capturing carbon dioxide and/or in the preparation of an absorbent for capturing carbon dioxide. In the carboxylate compound, the carboxylate anion is a carboxylate radical with a carbon chain having a carbon atom number of more than 3, or a branched-chain carboxylate radical having a carbon atom number of more than 6; and the cation is a substituted quaternary ammonium ion, quaternary phosphorus ion, pyridinium ion, pyrrolium ion, piperidinium ion, imidazolium ion or metal ion. In the present invention, a method which can capture carbon dioxide in an efficient and energy-saving manner by using a carboxylate compound and has water stability is involved, and the method comprises the following step: putting an aqueous solution of a carboxylate compound in a carbon dioxide atmosphere to absorb carbon dioxide, thereby obtaining a carboxylate and carbon dioxide conjugate precipitated from water.