Methods are provided for sequestering a pollutant gas of carbon dioxide (CO.sub.2) gas and/or hydrogen sulfide (H.sub.2S) gas in a subterranean reservoir. In one method, a carrier gas containing pollutant-sorbent particles (e.g., nanoparticles) is pumped into the subterranean reservoir, the pollutant-sorbent particles attach to the subterranean reservoir, the pollutant gas is pumped into the subterranean reservoir, and the pollutant-sorbent particles attached to the subterranean reservoir adsorb the pollutant gas. In another method, pollutant gas is introduced into a carrier liquid containing pollutant-sorbent particles to produce a pollutant-rich carrier liquid, the pollutant-rich carrier liquid is pumped into the subterranean reservoir, and the pollutant-rich carrier liquid is allowed to remain in the subterranean reservoir. A modifier gas or modifier liquid may be injected into the subterranean reservoir to modify a condition in the subterranean reservoir and thereby cause the pollutant-sorbent particles to release the sequestered pollutant gas.

Captured data center waste-heat is used as the input energy for carbon capture plant. Energy in the form of waste-heat is first captured from servers and other apparatus within the data center and optionally directed as the input to a heat-pump before being directed to the input of carbon capture plant, enabling carbon capture using a data centers waste-heat. Also disclosed are systems and apparatus for data center operators or cloud services to offer carbon negative or carbon neutral services to their customers. Cloud customers are offered options to select a carbon negative or carbon neutral service, the cloud operator storing their choice and then operating or managing carbon capture services to meet their requests.

The present invention relates to the CO.sub.2 and O.sub.2 remover. The CO.sub.2 and O.sub.2 remover comprises 65 to 85 weight percent (wt. %) of a nickel oxide (NiO), 5 to 20 wt. % of a magnesium oxide (MgO), wherein the weight ratio of the nickel oxide and the magnesium oxide (NiO/MgO) is 4 to 11, and wherein the wt. % is based on the weight of the CO.sub.2 and O.sub.2 remover.

A method for producing a nano-porous membrane with one or up to four graphene layers, pores in the membrane having an average pore size in the range of 0.2-50 or 0.3-10 nm, wherein the method involves the following steps: a) generation of a contiguous, essentially non-porous membrane with one or up to four graphene layers; b) distributed point wise defect creation in the non-porous membrane with one or up to four graphene layers by way of irradiation; c) generation and successive growth of the pores at the defects generated in step b) by thermal annealing in the gas phase, e.g. under 02 at a temperature in the range of 250° C. to less than 400° C.

There is provided a nitrogen rejection unit for extracting nitrogen and carbon dioxide from a flue gas, the system comprising: a first container for holding a first volume of the flue gas at a first pressure and a first temperature that is below or equal to the condensation temperature of the carbon dioxide and greater than the condensation temperature of nitrogen; an outlet for removing the carbon dioxide as a liquid from the first container; means for transporting gaseous nitrogen from the first container to a second container and means for cooling the nitrogen such that the second container contains nitrogen at a second temperature that is below or equal to its condensation temperature such that at least some of the nitrogen in the second container is in liquid form; and means for guiding the liquid nitrogen from the second container through or around the first container to cool the material within the first container to the first temperature. There is also provided a system for capturing carbon dioxide in a flue gas, a method for extracting nitrogen from a flue gas, and a method for capturing carbon dioxide in a flue gas.

An emissions clean-up process is provided to remove detrimental exhaust gases from a fossil fuel power plant and to produce and/or reclaim various useful commercial byproducts. The process includes mixing a blended liquid solution with a solubilizer in a mixing tank to create a chemical reaction therein to produce an ionic solid and an alkaline liquid solution. By mixing various blended solutions with desired solubilizers, alkaline liquids are produced which may be chemically combined to create other byproducts or sold commercially. Likewise, the alkaline liquids may be passed through a wet scrubber to create a byproduct that when chemically mixed with an acid creates desired byproducts. Other byproducts such as a sodium bicarbonate liquid solution exits the wet scrubber and is sold or used in the subject process to produce various other byproducts.

According to one embodiment, there is provided a carbon dioxide fixation system includes an electrolytic cell and a settling tank. An electrolytic cell electrolyzes seawater to generate sodium hydroxide (NaOH). A settling tank mixes the sodium hydroxide generated in the electrolytic cell, concentrated seawater, and carbon dioxide (CO.sub.2) to precipitate magnesium carbonate in which the carbon dioxide is fixed to magnesium (Mg) contained in the concentrated seawater.

The present disclosure concerns systems and sorbents for the removal of carbon dioxide from ambient air. In some aspects, the system includes a wind collector, a body and an outlet. The body has a monolith or platforms dispersed therein, surfaces of which are at least partially coated in a sorbent, such that passing ambient air that contacts the sorbent, thereby allowing for the removal of carbon dioxide therefrom. Sorbents of the present disclosure include substrates that are hybrids of a silica, optionally with a carbonaceous material, and an epoxy-modified aminopolymer.

The subject process relates generally to producing an aqueous solution through a simple but highly effective chemical reaction. The aqueous solution is composed of a blended solution with water and an added solubilizer for the chemical reaction. The results produce an ionic solid and an alkaline liquid solution which are useful commercial products, and various applications including but not limited to use as a CO.sub.2 capture solvent.

A carbon dioxide containing fluid is flowed through a membrane in an open position. The membrane encapsulates an adsorbent bed operating at a first temperature. The adsorbent bed adsorbs at least a portion of the carbon dioxide of the carbon dioxide containing fluid. The membrane is adjusted to a closed position, thereby isolating the adsorbent bed and preventing fluid flow into and out of the membrane. The adsorbent bed is heated to a second temperature, thereby desorbing the carbon dioxide captured from the carbon dioxide containing fluid. The membrane is adjusted to the open position. The adsorbent bed is cooled to the first temperature.