4results about How to "Efficient catalytic oxidation" patented technology

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 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.