A method for decomposing a nitroso compound, comprising: adding an aqueous solution containing hydrogen halide to a liquid to be treated that contains the nitroso compound in such a manner that the hydrogen halide is present in an amount of 2 mol or more and 20 mol or less per mol of a nitroso group in the nitroso compound; and subsequently heating the resulting liquid to be treated at a temperature of not lower that 75° C. and not higher than a boiling point of water under ordinary pressure, thereby an amines are recovered.

A method for preparing a ceramic composition while simultaneously reducing the quantity of carbon dioxide from municipal solid waste that would discharge into environment includes decomposing the municipal solid waste to generate a carbon dioxide-water vapor mixture, providing a matrix, the matrix containing a reactant; and contacting the carbon dioxide-water vapor mixture with the matrix to promote a reaction between the carbon dioxide of the carbon dioxide-water vapor mixture and the reactant of the matrix. The reaction forms a product, thereby producing the ceramic composition.

In one embodiment, a carbon dioxide capturing system includes an absorber configured to include a first contact portion that brings a combustion exhaust gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound, cause the absorbing liquid to absorb at least a portion of the carbon dioxide in the combustion exhaust gas at the first contact portion, and release the combustion exhaust gas. The system further includes a washing apparatus configured to include a second contact portion that brings the combustion exhaust gas released from the first contact portion of the absorber into contact with a washing liquid, and configured such that the combustion exhaust gas and the washing liquid are individually fed to an upstream side of the second contact portion.

In one embodiment, a carbon dioxide capturing system includes an absorber configured to include a first contact portion that brings a combustion exhaust gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound, cause the absorbing liquid to absorb at least a portion of the carbon dioxide in the combustion exhaust gas at the first contact portion, and release the combustion exhaust gas. The system further includes a washing apparatus configured to include a second contact portion that brings the combustion exhaust gas released from the first contact portion of the absorber into contact with a washing liquid, and configured such that the combustion exhaust gas and the washing liquid are individually fed to an upstream side of the second contact portion.

An information management system includes: a plurality of CO.sub.2 recovery devices configured to recover CO.sub.2; a CO.sub.2 collection station configured to collect CO.sub.2 recovered by the plurality of CO.sub.2 recovery devices; a CO.sub.2 using facility configured to use CO.sub.2 collected at the CO.sub.2 collection station; and an information management device including a communication unit configured to transmit linked information in which intended use information indicating intended use of CO.sub.2 in the CO.sub.2 using facility and an amount of use for the intended use is linked with identification information of a user of each of the plurality of CO.sub.2 recovery devices to an information communication terminal used by the user.

An information management system includes: a plurality of CO.sub.2 recovery devices configured to recover CO.sub.2; a CO.sub.2 collection station configured to collect CO.sub.2 recovered by the plurality of CO.sub.2 recovery devices; a CO.sub.2 using facility configured to use CO.sub.2 collected at the CO.sub.2 collection station; and an information management device including a communication unit configured to transmit linked information in which intended use information indicating intended use of CO.sub.2 in the CO.sub.2 using facility and an amount of use for the intended use is linked with identification information of a user of each of the plurality of CO.sub.2 recovery devices to an information communication terminal used by the user.

Disclosed is an absorbent containing an amine for absorption of an acid gas in a biogas, and a biogas purification system using the same.

Disclosed is an absorbent containing an amine for absorption of an acid gas in a biogas, and a biogas purification system using the same.

In some embodiments, the present disclosure pertains to methods of capturing CO.sub.2 from an environment by hydrating a porous material with water molecules to the extent thereby to define a preselected region of a plurality of hydrated pores and yet to the extent to allow the preselected region of a plurality of pores of the porous material to uptake gas molecules; positioning the porous material within a CO.sub.2 associated environment; and capturing CO.sub.2 by the hydrated porous material. In some embodiments, the pore volume of the hydrated porous material includes between 90% and 20% of the pre-hydrated pore volume to provide unhydrated pore volume within the porous material for enhanced selective uptake of CO.sub.2 in the CO.sub.2 associated environment. In some embodiments, the step of capturing includes forming CO.sub.2-hydrates within the pores of the porous material, where the CO.sub.2.Math.n/H.sub.2O ratio is n<4.

Multi-fiber, fiber optic cable assemblies may be configured so that the terminal ends of the cables have pre-assembled back-post assemblies that include pre-assembled ferrules, such as MPO ferrules that meet the requisite tolerances needed for fiber optic transmissions. To protect the pre-assembled components from damage prior to and during installation, pre-assembled components may be enclosed within a protective housing. The housing with pre-assembled components may be of a size smaller than fully assembled connectors so as to be sized to fit through a conduit. The remaining connector housing components for the multi-fiber connectors may be provided separately and may be configured to be attached to the back-post assembly after installation of the cable.