7results about How to "Efficient catalytic oxidation" patented technology

The invention belongs to the technical field of catalysts and catalysis, and relates to a low-carbon alkane catalytic oxidation technology in air pollution prevention and control, in particular to a quenching silver-loaded cobalt-based monolithic catalyst as well as a preparation method and application of the quenching silver-loaded cobalt-based monolithic catalyst. The precursor-loaded cordierite carrier obtained by an in-situ hydrothermal growth method can generate a needle-shaped structure morphology, on one hand, the cordierite carrier has relatively good mechanical strength, and on the other hand, cobalt-based and nickel-based active components can be fully exposed, so that the catalytic activity is improved; the cordierite carrier loaded with the precursor is calcined and then is quenched by using silver ion quenching liquid, so that silver clusters are clustered on the surfaces of the cobalt-based and nickel-based active components, and the cobalt-based, nickel-based and silver-based monolithic catalyst is formed, thereby further remarkably improving the catalytic activity and the mechanical strength of the active components; therefore, efficient and low-cost catalytic oxidation of low-carbon alkane is realized.

This invention discloses a functional diaphragm for high-pressure alkaline electrolyzers and its preparation method, belonging to the field of electrolytic hydrogen production technology. Starting from the core requirements of industrial alkaline electrolyzer diaphragms, this invention focuses on the key defects of existing diaphragms, such as poor gas barrier properties and low bubble point pressure, as well as the safety hazards caused by excessive hydrogen concentration in oxygen under high pressure and low load conditions. It provides a functional diaphragm for high-pressure alkaline electrolyzers, comprising sequentially connected anode isolation layers, multi-stage anode hydrogen elimination layers, a diaphragm substrate, and a cathode isolation layer. The multi-stage anode hydrogen elimination layers consist of at least two hydrogen elimination coating layers, and the content of hydrogen elimination catalyst in each layer decreases progressively from the diaphragm substrate towards the anode isolation layer. The preparation process of this functional diaphragm for high-pressure alkaline electrolyzers is simple, with excellent and stable hydrogen elimination performance, and it can ultimately achieve the goal of large-scale preparation of high-pressure electrolyzer diaphragms.

The utility model relates to the technical field of waste gas treatment, in particular to an oil refining and chemical VOCs waste gas comprehensive treatment device which can concentrate VOCs waste gas to improve the concentration of harmful components and improve the catalytic oxidation efficiency. Comprising a pretreatment box, a separation box and an oxidation treatment box, the filter cartridge I and the filter cartridge II are concentrically mounted in the separation box, the filter cartridge II is positioned in the filter cartridge I, a macromolecular filter screen is arranged on the filter cartridge I, a molecular sieve is arranged on the filter cartridge II, an input end of the waste gas pipe is communicated with the upper part of a separation cavity of the separation box, and an output end of the waste gas pipe is communicated with the lower part of the separation cavity; a gas outlet pipe is arranged at the top of the separation box, the input end of the gas outlet pipe extends into the filter cartridge II, the output end of the gas outlet pipe is connected with a first port of a three-way valve I, and the input end of an oxidation gas pipe is connected with a second port of the three-way valve I; and the output end of the oxidation gas pipe extends into the oxidation chamber of the oxidation treatment box.

The invention discloses a TiO2-loaded manganese-cerium oxide catalyst as well as a preparation method and application thereof, and aims to solve the technical problem that the oxidation efficiency of a manganese-cerium-based catalyst is not ideal at low temperature in the prior art. According to the catalyst, ammonium sulfate modified TiO2 is used as a matrix, and manganese cerium oxide with the load content of 0.1%-20% is used as an active component. The preparation method comprises the following steps: preparing an ammonium sulfate modified TiO2 carrier, mixing a manganese-cerium precursor solution with the carrier, treating, and loading the active component. According to the scheme, the low-temperature catalytic oxidation performance is improved by enhancing the acidity of the carrier and the synergistic effect of the active components.

The invention relates to a method and a device for treating organic waste gas containing low-carbon hydrocarbon, the waste gas is heated and then enters a catalytic oxidation reactor, and the reactor takes a fluidized bed as a main body and is filled with a granular catalyst; a tubular fixed bed is radially arranged on the fluidized bed and filled with a high-temperature-resistant catalyst, and the lower end of the fixed bed penetrates through the bottom of the reactor and is converged on an exhaust pipe; a gas-solid separator is arranged on the upper portion of the fluidized bed, fluidized and oxidized material flow passes through the gas-solid separator, carried particle catalysts are intercepted, separated gas is heated by a heater on the top of the reactor and then enters the fixed bed to be continuously oxidized, and high-temperature purified gas is exhausted through an exhaust pipe. The fluidized bed and the fixed bed are coupled, so that deep treatment and effective heat utilization of the low-carbon hydrocarbon-containing organic waste gas are realized, particularly, the reaction temperature is effectively homogenized, and high-temperature hot spots of a catalyst bed layer and the influence on the service life of a catalyst are avoided.

The invention provides an MOF-based composite material, a method for detecting VC through catalytic oxidation of TMB by using the MOF-based composite material and application of the MOF-based composite By preparing the Fe3O4 (at) MOF (at) Au nano material, efficient catalytic oxidation of the TMB is realized. According to the method, a composite structure of Fe3O4, MOF and Au is utilized, so that the catalytic efficiency and sensitivity are improved, and low-concentration VC can be detected more sensitively. By oxidizing TMB into ox-TMB and fixing the ox-TMB on the paper-based material, the concentration change of VC is directly observed by using the color change, so that the simple and convenient detection method is realized. The method has a wide application prospect in the field of chemical analysis and detection.

The invention provides a catalyst for removing non-methane alkane and a preparation method of the catalyst. The catalyst for removing the non-methane alkane is prepared from the following raw materials: a Cu / MXene-Cr / Co doped g-C3N4-CeO2 composite carrier and a metal active component, through the synergistic effect of the composite carrier and the metal active component, the catalyst has excellent low-temperature catalytic activity, water resistance, sulfur resistance and cycling stability, can efficiently remove non-methane hydrocarbons in various waste gases, and has a wide application prospect.