A carbon dioxide recovery system includes an electrochemical cell. The electrochemical cell includes a working electrode, a counter electrode, and an electrolytic solution. The working electrode includes a CO.sub.2 adsorbent. The working electrode and the counter electrode are disposed to sandwich the electrolytic solution therebetween. The CO.sub.2 adsorbent is configured to absorb CO.sub.2 in response to a voltage being applied between the working electrode and the counter electrode and electrons being supplied from the counter electrode to the working electrode. The CO.sub.2 adsorbent is a porous body having pores, and a pore diameter of the pores is larger than an ion diameter of the electrolytic solution.

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 enclosed within 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, the metal organic framework composite comprising: at least 50 wt % water adsorbent metal organic framework; from 0.2 to 10 wt % magnetic particles having a mean particle diameter of less than 200 nm; and at least 0.1 wt % hydrophilic binder comprising a hydrophilic cellulose derivative; and a water desorption arrangement in contact with and/or surrounding the water adsorbent, the water desorption arrangement comprising an alternating current (AC) magnetic field generator located within and/or around the water adsorbent configured to apply an AC magnetic field to the water adsorbent.

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.

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 adsorption material is disclosed that comprises a metal-organic framework and a plurality of ligands. The metal-organic framework comprising a plurality of metal ions. Each respective ligand in the plurality of ligands is amine appended to a respective metal ion in the plurality of metal ions of the metal-organic framework. Each respective ligand in the plurality of ligands comprises a substituted 1,3-propanediamine. The adsorbent has a CO.sub.2 adsorption capacity of greater than 2.50 mmol/g at 150 mbar CO.sub.2 at 40° C. Moreover, the adsorbent is configured to regenerate at less than 120° C. An example ligand is diamine 2,2-dimethyl-1,3-propanediamine. An example of the metal-organic framework is Mg.sub.2(dobpdc), where dobpdc.sup.4− is 4,4′-dioxidobiphenyl-3,3′-dicarboxylate. Example applications for the adsorption material are removal of carbon dioxide from flue gas and biogasses.

A method of increasing hydrothermal stability of an adsorbent comprising a small pore cationic zeolite in a swing adsorption process is disclosed. The method comprises the steps of coating the zeolite with a silylation agent to result in a silylated zeolite; and performing the swing adsorption process. The swing adsorption process comprises contacting the silylated zeolite with feed stream comprising water. The swing adsorption process may comprise removing CO.sub.2 from a feed stream comprising CO.sub.2 and water.

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.

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.

According to an example aspect of the present invention, there is provided a method of capturing and analyzing of colloidal microplastics and nanoplastics from aqueous medium. More precisely, the invention relates to a method for collecting and analyzing colloidal nano- and microplastic particles from aqueous media using nanoscaled lignocellulosic structures.

The present disclosure relates to a chabazite-type zeolite, comprising at least two cages composed of 4- and 8-membered rings connected by one 6-membered double ring, remarkable in that it has a Si/Al molar ratio comprised between 1 and 15, in that it comprises caesium and potassium with a Cs/K molar ratio of at most 5.0 and in that it forms nanoparticles with an average crystal size comprised between 5 nm and 250 nm and with a specific surface area comprised between 50 m.sup.2g.sup.−1 and 200 m.sup.2g.sup.−1. 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 chabazite-type zeolite, are also described. Finally, the use of the chabazite-type zeolite as a sorbent for carbon dioxide is also demonstrated.