Abstract: Sorbent materials are described that have enhanced performance in removing chlorine and chloramine, among other toxic compounds. The sorbent materials are formed by a process which includes steps of oxidation using an oxidizing agent, adding a nitrogen-containing compound, and calcining the sorbent.

Abstract: Sorbent material sheets products that include sorbent material sheets and at least one porous cover layer are attached to an inner wall surface that is defined by an air intake. The sorbent material sheets collect vapors such as hydrocarbon vapors from engine components such as the combustion chamber, injectors, carburetor, fuel ports, crankcase, or other engine components, thereby reducing evaporative emissions. In certain configurations, the sorbent material sheet product includes an edge seal that improves the handling of the sorbent material sheets during the manufacturing process.

Abstract: Carbonaceous material that is activated to form precursor activated carbon is further enhanced by doping with iron and nitrogen and calcining. The resultant sorbent material has excellent catalytic properties which are useful in the field of fluid purification. The further enhancement can be performed in a single stage process or a dual stage process. The carbonaceous material includes those obtained from coal, wood, or coconut shells. The described treatment processes result in a sorbent material that has excellent performance in removing chloramine and similar compounds from fluids such as water that is intended for drinking.

Abstract: Sorbent sheets containing sorbent and binder may be used for efficient adsorption and desorption of low-density hydrocarbons to the sorbent, such as activated carbon, therein. One or more sheets, optionally arranged in a multi-layered configuration, may be included in a housing for improved storage and transportation of low-density hydrocarbons such as natural gas.

Abstract: Sorbents are disclosed which exhibit less inherent leaching of arsenic and antimony than what is achieved by conventional sorbents. The inventive sorbents are formed by a process which includes the steps of contacting the porous sorbent particulate with a solution of a metal oxide or metal hydroxide, or a metal oxide or metal hydroxide precursor, and depositing metal oxides and hydroxides within the pores of the porous sorbent particulate. Purification of water is also described.

Abstract: Carbonaceous material that is activated to form precursor activated carbon is further enhanced by doping with copper, iron, and nitrogen and calcining. The carbonaceous material includes those obtained from coal, wood, or coconut shells. Methods of doping the activated carbon are described. The described treatment processes result in a sorbent material that has excellent performance in removing chloramine and similar compounds from fluids such as water that is intended for drinking.

Abstract: Sorbent materials contain carbonaceous material that has been activated to form a precursor activated carbon have been subjected to a pretreatment with an acid or a base followed optionally by thermal oxidation are useful for treating water. The sorbent material is made by contacting the precursor activated carbon with a nitrogen source and a metal source, and optionally by thermally oxidizing the precursor activated carbon. The resulting doped precursor activated is also calcined.

Abstract: Sorbent materials that are treated with ions, salts, oxides, hydroxides, or carbonates of calcium, magnesium, strontium, or barium are useful in removing perfluoroalkyl and polyfluoroalkyl substances (PFAS), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), 2,3,3,3,-tetrafluoro-2-(heptafluoropropoxy)propanoate and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, and similar compounds from liquids and gases are disclosed. The sorbent materials with the disclosed treatments offer improved performance as measured against untreated sorbent materials.

Abstract: There is provided a method to characterize a sorbent. The method may provide a sorbent, suspend the sorbent in a fluid, stir the sorbent in the fluid, filter the sorbent from the fluid to isolate a filtrate, measure the electrical conductivity of the filtrate, and measure the alkalinity of the filtrate.

Abstract: The present disclosure described compositions which may be effective in removing contaminants from a gas stream such as nitrous oxides. The composition may include a sorbent which contains triethylenediamine and a metal including copper, zinc, or a combination thereof. Methods of making such a composition are also described, along with devices which use the composition to remove contaminants from fluid streams, particularly in vehicle tunnels and parking garages.

Abstract: Sorbents are disclosed which exhibit less inherent leaching of arsenic and antimony than what is achieved by conventional sorbents. The inventive sorbents are formed by a process which includes the steps of contacting the porous sorbent particulate with a solution of a metal oxide or metal hydroxide, or a metal oxide or metal hydroxide precursor, and depositing metal oxides and hydroxides within the pores of the porous sorbent particulate. Purification of water is also described.

Abstract: Various embodiments of the present invention are directed to methods of preparing a biogas purification system. Embodiments include flushing an adsorber with a gas stream that is separable by the downstream biogas purification process. Other embodiments include using the separable gas stream to flush a saturated adsorber. Additional embodiments include using a gas stream comprised of CO2.

Abstract: Carbonaceous material that is activated to form precursor activated carbon is further enhanced by doping with copper and nitrogen and calcining. The resultant sorbent material has excellent catalytic properties which are useful in the field of fluid purification.

Abstract: Sorbent materials that are treated with ions, salts, oxides, hydroxides, or carbonates of calcium, magnesium, strontium, or barium are useful in removing perfluoroalkyl and polyfluoroalkyl substances (PFAS), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), 2,3,3,3,-tetrafluoro-2-(heptafluoropropoxy)propanoate and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, and similar compounds from liquids and gases are disclosed. The sorbent materials with the disclosed treatments offer improved performance as measured against untreated sorbent materials.

Abstract: There is provided herein a method of reducing the backwash frequency required in water treatment facilities which includes utilizing a surface-modified activated carbon. A method of preparing said surface-modified activated carbon is also provided. The method of preparing may include oxidizing an activated carbon with a chemical oxidant, which may result in surface functionalization of the activated carbon.

Abstract: Carbonaceous material that is activated to form precursor activated carbon is further enhanced by doping with copper and nitrogen and calcining. The resultant sorbent material has excellent catalytic properties which are useful in the field of fluid purification.

Abstract: Methods and systems for reducing mercury emissions from fluid streams are provided herein, as are adsorbent materials having high volumetric iodine numbers.

Abstract: A device may include a roller, a half pipe which is separated from the roller by a gap, a motor, a speed controller configured to control operation of the motor, and a drive which is operably connected to the motor and configured to rotate the roller. The device may be used in a testing method for testing an adsorbent material.

Abstract: The present application relates to activated carbon compositions for removing viral, bacterial, or other infectious particles from air. The activated carbon was found to be effective at filtering aerosolized bacteriophage particulates and could be applied to barrier materials which prevents viral particulates from passing through, for example in home filters or masks or other coverings to prevent the spread of infectious diseases.

Abstract: Sorbent material sheets provide for enhanced performance in vapor adsorbing applications over conventional canisters and other emissions control equipment. The sorbent material sheets can be formed as part of a small, lightweight canister, or can be integrated into a fuel tank. The sorbent material sheets can also be used as part of an onboard refueling vapor recovery system to control volatile organic compound emissions from fuel tanks of gasoline vehicles, such as automobiles.