The present invention provides a gas filter comprising an active element and a housing structure for said active element, said housing structure comprising a gas inlet and a gas outlet, said active element comprising or consisting of: a matrix material; a CO.sub.2 sorbent; and water, wherein at least some of the CO.sub.2 sorbent is embedded within the matrix material.

Disclosed herein is a method of regenerating a sorbent of gas in a capture process of said gas, wherein the capture process comprises recirculating the sorbent between a gas capturing system and regenerating reactor system, the method comprising the regenerating reactor system performing the steps of: receiving a solid sorbent to be regenerated, wherein the sorbent is a sorbent of carbon dioxide gas; generating heat by combusting a fuel with an oxidising agent in the presence of a catalyst; regenerating the sorbent by using the generated heat to indirectly heat the sorbent so that the sorbent releases carbon dioxide gas; outputting the regenerated sorbent; and outputting the released carbon dioxide gas. Advantages of the gas capture system include a higher efficiency than known techniques.

The invention provides methods and systems for washing adsorptive media with minimal water consumption. More specifically, the invention provides methods and systems for in situ regeneration and/or sanitization of adsorptive media, such as activated carbon, using back-and-forth washing.

Provided herein are methods of novel methods of synthesizing a metal-organic framework system by vapor-phase appending of a plurality of ligands appended to a metal-organic framework. Also, provided are methods of recycling metal-organic framework systems by detaching the ligand and re-appending the same ligand or appending a different ligand to the metal-organic framework to provide a recycled or repurposed metal-organic framework system.

An emissions control system including a fluidized bed apparatus containing a reactive sorbent material is disclosed for gaseous and non-gaseous contaminated emissions. The reactive sorbent material may be CZTS, CZTS-Alloy, or a carbon-based sorbent material. The fluidized bed apparatus is configured with one or more closed loop sorbent recycling subsystems. The sorbent recycling subsystems include the capability to separate sorbents from each other, separate contaminates from sorbents for disposal and/or recycling, clean and/or rejuvenate sorbents for return to the fluidized bed apparatus, dispose of spent and exhausted sorbents, and replace the spent and exhausted sorbents with new sorbent to maintain consistent sorbent function in the fluidized bed apparatus. Monitoring sensors provide information useful in a method for establishing and maintaining consistent process parameter controls.

Disclosed herein are systems and methods for regenerating media in a siloxane removal system. In particular, the present disclosure relates to a method for regenerating an adsorption medium, comprising receiving a source gas stream comprising at least one hydrocarbon and carbon dioxide; separating the source gas stream into a carbon dioxide-rich gas stream, and a substantially carbon dioxide-free gas stream; directing the carbon dioxide-rich gas stream into a regeneration vessel containing an adsorption medium having one or more adsorbed impurities on the adsorption medium; desorbing impurities from the adsorption medium by contacting the adsorption medium with the carbon dioxide-rich gas stream to generate a carbon dioxide-rich gas containing desorbed impurities and a regenerated adsorption medium; and directing the carbon dioxide-rich gas stream containing desorbed impurities out of the regeneration vessel.

The present disclosure relates to an onshore lithium-recovering device for a lithium ion adsorption and desorption process including a supply unit for supplying lithium-containing water in which lithium is dissolved, a composite unit, a washing unit, a desorbing liquid unit, an extract liquid unit, a pressure adjusting unit, a discharge unit, and a control unit. Therefore, the lithium adsorption means is moved onshore so it is possible to significantly reduce the plant installation cost and the operating cost as compared to the lithium recovery process that operates the conventional offshore plant.

A system for recovering nitrogen during regeneration of a treater, the system including an adsorbent bed downstream of the treater, wherein the adsorbent bed comprises an adsorbent operable to adsorb at least one impurity from a treater bed regeneration effluent stream comprising nitrogen to provide a nitrogen product having a higher nitrogen purity than a nitrogen purity of the treater bed regeneration effluent stream. A method for recovering nitrogen during regeneration of a treater is also provided.

A dual function material is provided that captures carbon dioxide from ambient air, i.e., direct air capture, and converts the CO.sub.2 to a desired product such as methane. The material includes a high surface area carrier such as Al.sub.2O.sub.3 upon which catalysts and alkaline adsorbents are positioned proximate each other. In the presence of reactive gas such as hydrogen, the catalysts reduce the adjacent adsorbents to generate additional active sites and enhance the amount of CO.sub.2 captured by the material. Once the material becomes saturated with CO.sub.2, hydrogen is reintroduced to reduce the catalyst, such as ruthenium, at which time the adsorbed CO.sub.2 can migrate from the adsorbent to the catalyst for catalytic conversion to methane. The materials can be employed in isothermal, cyclic reactor systems where target species are bound and then desorbed to reactivate the material, e.g., bind more target species for desorption and/or conversion to additional product.

The present invention relates to a process for the regeneration of the spent silica resin used in chromatography without unpacking resin from chromatography column. The process comprises 3 steps, namely: contacting the chromatography resin with regeneration solution, neutralizing the regenerated chromatography resin with neutralization solution and washing the neutralized chromatography resin with wash solution.