43results about How to "Promote catalytic oxidation" patented technology

The invention provides a high-performance ferroferric oxide-carbon and nitrogen composite, and belongs to the technical field of composite materials. The composite is prepared by uniformly doping nano ferroferric oxide in a polypyrrole matrix. Because the composite has high activity and large specific surface area, and N atoms doped on the surface can immobilize active grains of a catalyst, and afuel cell catalyst prepared from the composite serving as a carrier has synergism with nanoparticles loaded on the catalyst to promote electrode catalysis reaction so as to improve the catalysis performance of the catalyst. Compared with the traditional catalyst prepared from a C carrier, the fuel cell catalyst has better catalysis performance and higher stability.

A chemical for removing pollutants from drinking water contains perferrite, permanganate and assistant. It features strong catalytic oxidizing action for destroying oraganic substances.

The invention discloses a supported type Au catalyst containing an organic polymer electronic auxiliary, a preparation method and an application of the catalyst. The supported type Au catalyst is a high-dispersion supported type catalyst which takes TiO2 as a carrier, polyaniline as an electron donor and an Au nano particle as an active component. According to the supported type Au catalyst, the visible light CO catalysis oxidation property of the Au catalyst at room temperature is improved from the angle of the electronic auxiliary, a TiO2-PANI supporter is prepared through in-situ polymerization PANI (Polyaniline) on a TiO2 semiconductor oxide supporter, subsequently Au nano particles with visible light LAPR response are subjected to deposition-precipitation and supporting, and finally visible light illumination is introduced into a reaction system of CO catalysis oxidation. The method for introduction and photo-thermal coupling of the PANI electronic auxiliary is simple and feasible, and the application of the auxiliary in desorption of CO in the air, the removal of CO in hydrogen-enriched atmosphere in a fuel battery and the conversion of CO2 is facilitated.

The invention discloses a CeO2@MnOx low-temperature SCR flue gas denitrification catalyst as well as a preparation method thereof and an application thereof. An MnOx nanoparticle prepared through a precipitation method is taken as an inner core, and CeO2 is packaged on the outer layer of the MnOx nanoparticle through an in-situ liquid-phase deposition method, and roasting is performed to prepare the CeO2@MnOx low-temperature SCR flue gas denitrification catalyst with a core-shell structure, wherein in the prepared CeO2@MnOx low-temperature SCR flue gas denitrification catalyst, a mass ratio of MnOx to CeO2 is 1 to (0.4-1.2). The CeO2@MnOx low-temperature SCR flue gas denitrification catalyst has the core-shell structure, greatly improves oxidization-reduction capacity of an active component MnOx, and has excellent NOx catalytic reduction activity at a temperature of 110-200 DEG C.

The invention belongs to the technical field of wet flue gas desulfurization and in particular relates to a novel limestone-gypsum wet flue gas desulfurization additive which is prepared from vinegar liquid subjected to biomass pyrolysis carbonization, or is a composite additive prepared by mixing the vinegar liquid with any one or more of organic acid, organic acid salt, inorganic metallic salt, an active agent and an oxidizing agent in a traditional wet desulfurization additive. The additive disclosed by the invention has the effects of effectively reducing soil-liquid mass transfer resistance in desulfurization slurry and stabilizing the pH value of the slurry so as to improve the desulfurization efficiency; furthermore, the additive containing the oxidizing agent can be used for accelerating the catalytic oxidation of a wet desulfurization product (calcium sulfite) so as to increase the reaction rate of limestones in the slurry and improve the quality of a wet desulfurization by-product (gypsum).

The invention discloses a core-shell structure molecular sieve catalyst for cooperatively controlling NO and methylbenzene and a preparation method. The molecular sieve catalyst comprises a Cu-SAPO-34molecular sieve core and a CeO2 shell, wherein the Cu-SAPO-34 molecular sieve core is formed by loading CuO on an SAPO-34 molecular sieve, and the CeO2 shell is self-assembled on the surface of the Cu-SAPO-34 molecular sieve core. The catalyst comprises, in weight percent, 1%-3% of CuO, 15.0%-30% of CeO2 and the balance SAPO-34. The preparation method includes the steps: preparing Cu-SAPO-34 by an ion exchange method; wrapping the molecular sieve with the CeO2 by a self-assembly method; performing drying and inert nitrogen calcining to prepare the catalyst. According to the catalyst, active components can be more effectively dispersed, the hydrothermal stability of the catalyst can be improved, sulfur poisoning of the catalyst can be effectively prevented, the methylbenzene can be cooperatively controlled in denitration, and the hydrocarbon poisoning resistance of the catalyst is improved.

The invention relates to a photocatalytic flue gas mercury removal device in a power plant chimney. The mercury removal device comprises a shell, a UV lamp unit and a photo-catalytic reaction unit, wherein the UV lamp unit is arranged on the shell; the photo-catalytic reaction unit is arranged in the shell; the photo-catalytic reaction unit comprises multiple metal sheets; the metal sheets are arranged into a 'spider web' structure in a radial direction by taking the axis of the shell as the center; a catalyst is supported on the surface of the metal sheets. Compared with the prior art, the device has a large contact area with the flue gas, the flue gas and the nano photocatalyst can be in contact and react in more time, and the flue gas treatment efficiency can be effectively improved.

The invention discloses a wide-temperature-range dry flue gas denitrifying agent and a preparation method thereof. The flue gas denitrifying agent has a structure as aAO.bGxOy.mDxOy.nAl2O3, wherein A is one of barium, magnesium and calcium serving as group IIA metals, G is one of chromium, iron, cobalt and zinc serving as transition metals, and D is one of copper, manganese and silver. Calculated based on the total mass of a catalyst, the wide-temperature-range dry flue gas denitrifying agent comprises 28%-42% of AO, 30%-40% of GxOy, 10%-20% of DxOy and 8-12% of Al2O3. The dry flue gas denitrifying agent can be used for controlling the discharge of NOx in flue gases from an industrial boiler, a kiln, a coking coke oven and the like. The dry flue gas denitrifying agent has the advantage of realizing the ammonia-free efficient conversion of NOx within a relatively wide temperature range so as to be suitable for industrial application.

The invention discloses a lanthanum-doped copper-manganese composite oxide catalyst and a preparation method thereof. In the XRD diffraction spectrum of the catalyst, a diffraction peak of Cu1.5Mn1.5O4 spinel phase is contained, and no diffraction peaks of La and Mn2O3 are contained; in the XPS Cu 2p spectrum of the catalyst, two peaks at 933.3+/-0.1 eV and 930.5+/-0.1 eV are contained. More reactive oxygen and more active oxygen transport channels are resulted from existence of Cu1.5Mn1.5O4 and weak crystallization of MnOx, and the catalytic performance of the copper-manganese composite oxidecatalyst for VOCs can be improved further through La. The preparation method comprises the following steps: (1) dissolving a manganese salt, a copper salt and a lanthanum salt in water, carrying outwater bath for 0.1-1 h with a water bath temperature at 50-70 DEG C; (2) adding an ammonium salt solution to a pH value of 7.5-8.5, and keeping stirring for 1-3 hours; and (3) taking the precipitate,and then performing drying and sintering so as to obtain the lanthanum-doped copper-manganese composite oxide catalyst. The preparation method of the lanthanum-doped copper-manganese composite oxide catalyst has a simple process, easy control and volume production.

The invention relates to a modified manganese oxide catalyst, a preparation method and application thereof. The catalyst is obtained by loading a transition metal element to manganese oxide serving asa carrier, is rich in surface oxygen vacancies on the surface, and has excellent activation capability on oxygen and nitric oxide, so that the catalyst provided by the invention has excellent catalytic activity. Also, the catalyst has excellent selectivity on CO2 during catalytic oxidation of soot particles, and the selectivity on CO2 is close to 100% in a catalytic reaction interval of 300-550DEG C.

The invention relates to a sludge treatment device using a catalytic wet oxidation method, and relates to the technical field of sludge treatment equipment, the device comprises a high-temperature high-pressurekettle and a sealing cover, the left side of the front surface of the high-temperature high-pressure kettle is provided with an electrothermal furnace, and the left side of the high-temperature high-pressure kettle is connected with an oxygen gas tank, the sealing cover is arranged at the upper end of the high-temperature high-pressure kettle, and the sealing cover is connected to the high-temperature high-pressure kettle through bolts, and the upper right side of the oxygen gas tank is inlaid with an air inlet pipe. The method has the advantages that: by rotating an agitator shaft in the high-temperature high-pressure kettle through a rotating shaft, aagitator rod can be driven to stir the sludge, so that the catalyst can be mixed with the sludge quickly and evenly, and the sludge can be fully and rapidly contacted with the oxygen. The catalytic oxidation of the sludge can be accelerated and the sludge is uniformly contacted with heat, so that the sludge can be quickly treated, and the organic matters and reductive inorganic matters in the sludge can be quickly oxidized to carbon dioxide and water and a small amount of solid residue.

The invention provides a graphene composite material for removing formaldehyde and a preparation method of the graphene composite material. The preparation method comprises the steps: firstly, carrying out modification treatment on titanium oxycarbonitride by utilizing gamma-methacryloxypropyltrimethoxysilane to obtain modified titanium oxycarbonitride; then carrying out modification treatment onsilicon and boron co-doped graphene by utilizing 3-aminopropyltriethoxysilane to obtain modified graphene; and finally, carrying out mixing reaction on the modified titanium oxycarbonitride, the modified graphene and the modified silica gel to obtain the graphene composite material. The modified silica gel is obtained by carrying out modification treatment on silica gel by utilizing 3-aminopropyltrihydroxysilane. The graphene composite material can catalytically oxidize formaldehyde into harmless carbon dioxide and water at normal temperature, and formaldehyde can be thoroughly removed in a short time.

The invention relates to a sulfur-containing organic waste gas catalytic oxidation catalyst and a preparation method thereof. The surface of a honeycomb carrier is coated with an aluminum oxide-titanium oxide composite coating, then the honeycomb carrier is soaked in composite slurry, and the composite slurry is prepared after an SSZ-13 molecular sieve loads an active component. According to the catalyst, sulfur-containing organic matters in waste gas can be efficiently converted into sulfur dioxide, the SO2 selectivity is high, and the adverse effect of organic sulfides on the subsequent technological process is avoided.

The invention provides a method for preparing an oxygen vacancy-containing bismuth tungstate ultrathin sheet. The method comprises the following steps: step 1) synthesizing an oxygen vacancy-free bismuth tungstate (Bi2WO6) ultrathin sheet by using a hydrothermal method; and step 2) synthesizing the oxygen vacancy-containing bismuth tungstate ultrathin sheet from the oxygen vacancy-free bismuth tungstate ultrathin sheet obtained in the step 1) by using a vacuum aluminothermic method. The invention also provides the oxygen vacancy-containing bismuth tungstate ultrathin sheet prepared by using the method, and a method for photocatalytic degradation of formaldehyde into carbon dioxide by using the oxygen vacancy-containing bismuth tungstate ultrathin sheet.