A method for producing a carbon fiber material is disclosed, the method comprising the steps of a) Preparation of a solution of polyacrylonitrile in a suitable organic solvent b) Electrospinning of the solution obtained in a) and drying of the obtained fiber material c) Crosslinking of the obtained fiber material by heating to 150 to 350° C. in an air or oxygen atmosphere for 1 to 30 h d) Carbonization of the obtained fiber material in an inert gas atmosphere at a temperature in the range of 500 to 2,500° C., characterized in that no silicon, sulfur, metal compounds, intermetallic compounds, silicon compounds and/or sulfur compounds are added to the polyacrylonitrile solution in step a) and that neither stabilization nor surface modification steps are carried out with the fiber material by treatment with chemical reagents and/or exposure to tensile stress.

Also disclosed is a carbon fiber material obtainable by the above process, as well as a carbon fiber material, characterized in that it has a proportion of ultramicropores V.sub.<0.4 nm of 0.01 to 10, more preferably 0.02 to 5, even more preferably 0.025 to 0.1, most preferably 0.03 to 0.06 cm.sup.3/g, determined by CO.sub.2 adsorption tests and evaluation with DFT and GC-MC simulation.

The present disclosure relates to an RHO-type zeolite comprising caesium and M.sup.1 .sub.wherein M.sup.1 is selected from Na and/or Li remarkable in that it has a Si/Al molar ratio comprised between 1.2 and 3.0 as determined by .sup.29Si magic angle spinning nuclear magnetic resonance, in that the RHO-type zeolite has a specific surface area comprised between 40 m.sup.2g.sup.−1 and 250 m.sup.2g.sup.−1 as determined by N.sub.2 adsorption measurements, in that the RHO-type zeolite being in the form of one or more nanoparticles with an average crystal size comprised between 10 nm and 400 nm as determined by scanning electron microscopy wherein said nanoparticles form monodispersed nanocrystals or form aggregates of nanocrystals having an average size ranging from 100 nm to 500 nm, as determined by scanning electron microscopy. Amorphous precursors, devoid of an organic structure-directing agent, as well as a method for preparation of these amorphous precursors in the absence of such organic structure-directing agent and method for preparation of the RHO-type zeolites, are alos described. Finally, the use of the RHO-type zeolite as a sorbent for carbon dioxide is also demonstrated.

One aspect of the present invention relates to a carbonaceous material which has a benzene adsorption of 25 to 40% and a vitamin B12 adsorption of 13.0 to 50.0 mg/g, while having a pore volume of mesopores of 0.070 to 0.150 cm.sup.3/g as calculated from a nitrogen adsorption isotherm by means of a BJH method.

Reactor allowing the continuous filtration of a flowing fluid for the adsorption of pollutants on a filter, and electrolysis for regeneration of the filter and removal of organic pollutants, the reactor having a chamber, with at least one inlet delivering a fluid into the chamber and at least one outlet for evacuating the fluid from the chamber; a circuit for circulating a fluid to be treated by adsorption of pollutants on the filter; a circuit for recirculating an electrolyte solution for electrolysis, connecting the outlet to the inlet; the reactor operating in two modes; in continuous filtration mode of a fluid through the circulation circuit for adsorption of pollutants on the filter; in electrolysis mode for regeneration of the filter and removal of organic pollutants, by applying an electric current, with continuous recirculation of the electrolyte solution through the recirculation circuit.

A biochar-derived adsorbent preferably from Sargassum boveanum, macroalgae can be used for removing phenolic compounds, such as 2,4,6-trichlorophenol and 2,4-dimethylphenol, from aqueous solutions. The carbonization can improve the removal capability of the macroalgae adsorbent for such phenolic compounds with removal efficiencies of 60% or more from high salinity seawater and 100% from distilled water. The adsorption may occur through a mixed mechanism dominated by physisorption following pseudo second-order kinetics. The adsorption of the phenolic molecules may be spontaneous, endothermic and thermodynamically favorable.

The present disclosure is directed to metal ion-containing zeolitic compositions, preferably transition metal ion-containing, more preferably zinc ion containing zeolitic compositions, that are useful for reversibly scavenging water from humid gaseous feed streams, including air, and method of making and using the same. In some embodiments, the compositions comprise zinc-ion-doped zeolites have LTA, FAU, or EMT topologies.

The present disclosure is directed to metal ion-containing zeolitic compositions, preferably transition metal ion-containing, more preferably zinc ion containing zeolitic compositions, that are useful for scavenging CO.sub.2 from low-CO.sub.2-content feed streams, including air, and method of making and using the same. In some embodiments, the compositions comprise zinc-ion-doped zeolites having AEI, AFX, or CHA topologies.

A polymeric hydrogel microparticle that contains polyacrylamide and chitosan, the chitosan uniformly incorporated in a polyacrylamide matrix. The microparticle, having a coefficient variation of 0 to 2% and containing macropores with an average size of 1 to 60 nm, is capable of transporting biomolecules conjugated to it. Also disclosed are a method of fabricating such a microparticle in a micromold via photo-induced radical polymerization and a one-pot method of conjugating biomolecules to polymeric hydrogel microparticles.

A sorbent suitable for sorbing aldehydes includes acidified zeolite impregnated with a urea-based compound, the acidified zeolite having a pore opening of 5 Å or greater and a molar ratio of silicate to aluminate of at least 1.1:1. The sorbent may be prepared by impregnating acidified zeolite with a solution of a urea-based compound, where the acidified zeolite includes proton counterions. The sorbent may be supported on a filter support to provide an air filter.

A thermal management system includes a space structure, a feed water container, a water feed line, a pump, and a filter device. The space structure includes a heat source connected with a fluid loop for conveying a working fluid through the heat source to regulate temperature and a sublimator connected with the fluid loop to receive the working fluid. The sublimator has a porous surface. The water feed line is connected with the container and the sublimator. The pump is located in the feed water line and is operable to move the feed water from the container to the sublimator. The sublimator is operable to cool the working fluid using the porous surface. The filter device is located in the water feed line between the pump and the feed water container. The filter device includes an adsorbent bed to remove organic compounds.