摘要:
Systems and methods for removing hydrogen peroxide from water purification systems are provided. In a general embodiment, the present disclosure provides a water purification system including a water treatment unit, an electrodeionization unit and a hydrogen peroxide decomposition catalyst in fluid connection with the electrodeionization unit. The water purification system can be fluidly connected to a renal treatment system.
摘要:
La presente invención se refiere a un catalizador sólido que comprende una matriz reticular metal-orgánica y un agente promotor de la generación de radicales, a un procedimiento de obtención de dicho catalizador y a su uso como catalizador en la reacción de oxidación aeróbica selectiva de hidrocarburos.
摘要:
Described are catalyst compositions and methods for their preparation and use. Certain catalyst compositions can include at least one reduction catalyst and at least one oxidation catalyst. A catalyst composition as described herein is useful in providing certain benefits to a combustible fuel, such as, for example, reducing harmful emissions and/or improving overall fuel economy.
摘要:
A method of forming a supported catalyst for a fuel cell includes depositing platinum onto a carbon support material, depositing a first alloy metal onto the carbon support material following the deposition of the platinum, and depositing a second alloy metal onto the carbon support material following the deposition of the first alloy metal. The first alloy metal is selected from iridium, rhodium, palladium, and combinations thereof, and the second alloy metal includes a first or second row transition metal.
摘要:
A catalyst for the selective catalytic reduction of a nitrogen oxide, comprising a first component selected from oxides of a transition metal other than the metal contained in the second component, or a mixture or combination thereof, a second component selected from cerium oxides, cerium-zirconium composite oxides, and cerium-titanium composite oxides, and combinations thereof. The catalyst can be utilized in pellet form; or coated onto a porous monolithic ceramic to form a honeycomb-shaped catalyst. Provided in the present invention is also the process for making said catalyst, which includes: preparing the first component from the precursor of the first component; preparing the second component; and loading the first component onto the second component.
摘要:
The invention relates to mixed oxide catalysts comprised of aluminum oxide and zirconium oxide and of a metal of group VIII, and to a method for the production thereof. Catalysts of this type are suited for catalytically combusting hydrocarbons and CO with air or oxygen.
摘要:
Nanostructured materials and processes for the preparation of these nanostructured materials in high phase purities using cavitation is disclosed. The method preferably comprises mixing a metal containing solution with a precipitating agent and passing the mixture into a cavitation chamber. The chamber consists of a first element to produce cavitation bubbles, and a second element that creates a pressure zone sufficient to collapse the bubbles. The process is useful for the preparation of catalysts and materials for piezoelectrics and superconductors.
摘要:
A method for the preparation of quasi-crystalline, porous inorganic and organic oxide materials possessing uniform framework-confined mesopores in the range 1 to 12 nm prepared using an organic silane, such as (RO)3SiR1. The method uses an interaction between various nonionic poly(oxyalkylene) polymer based surfactants and neutral inorganic oxide precursors at ambient reaction temperatures. Exemplary surfactants are alkyl-polyethylene oxides and alkylphenyl-polyethylene oxides. Exemplary inorganic oxide precursors are single metal and double metal alkoxides including tetraethylorthosilicate (TEOS). Recovery of the template can be achieved through solvent extraction where the solvent may be water, an organic solvent, a mixture of organic solvents, or a mixture of water and organic solvent(s). The porous products produced may be used as absorbents, ion-exchangers, catalyst, catalyst supports or composites.