32results about How to "Strong resistance to chlorine poisoning" patented technology

The invention discloses a catalyst for purification of waste incineration flue gas. The catalyst takes vanadium oxide, platinum oxide and tungsten oxide as active components, gamma-alumina, titanium oxide and carbon nanotubes as carriers and one or more of manganese oxide, iron oxide, copper oxide, tin oxide and cerium oxide as active aids. The catalyst has the functions of decomposing dioxin andchlorobenzene compounds and functions of denitration and sulfur resistance and still has excellent removal capacity for dioxin and NOx at lower temperature. The invention also discloses a preparationmethod of the catalyst for purification of waste incineration flue gas. The preparation method has the advantages of being simple to operate, convenient, controllable and suitable for mass industrialproduction.

The method discloses a low-temperature catalytic combustion eliminating catalyst of volatile chloro aryl hydrocarbons, the catalyst is mainly composed of an alumina support modified by alkaline-earth metal, and loaded rare earth oxide and transition metallic oxide thereof; wherein the alkaline-earth metallic oxide includes magnesium oxide and barium oxide, the transition metallic oxide include one or more kinds of copper oxide, ferric oxide, vanadium pentoxide, manganese oxide, cobalt oxide and tungsten oxide, and the rare earth oxide is one or more kinds of lanthana oxide, cerium oxide, neodymium oxide and gadolinium oxide. The catalyst has high catalytic activity and no by-product generation, does not cause secondary pollution, and has strong anti-chlorin poisoning capacity and long catalyst life, and is particularly suitable for low-temperature catalytic combustion for removing halogen-contained organic compounds, especially for removing volatile chloro aryl hydrocarbon pollutants.

The invention discloses a method for eliminating chloro aromatic hydrocarbon through low-temperature catalytic combustion. The method comprises the following steps that precious metal-ruthenium is loaded on cerium oxide nanorods, nanocubes and nano regular octahedrons which are used as a carrier to be taken as a catalyst, air used as an oxidizing agent is introduced into a reactor, so that chloro aromatic hydrocarbons are completely combusted in the presence of the catalyst and are converted into carbon dioxide, hydrogen chloride and little chlorine gas, and the completely-combusted tail gas is emptied after being absorbed by dilute alkali solution to remove acid gas such as hydrogen chloride and chlorine gas. The used catalyst has high activity without byproduct generation and secondary pollution, strong chlorine poisoning resistance and long service life, is particularly suitable for eliminating halogen-containing organic compounds through complete low-temperature catalytic combustion, particularly eliminating easily-volatile chloro aromatic hydrocarbon contaminants.

The invention relates to metal doped modified layered [delta]-MnO2, preparation and applications thereof. According to the present invention, the metal doped modified layered [delta]-MnO2 is preparedby adding a settling agent through a hydrothermal method, wherein the specific surface area is increased by 5 times compared with the undoped layered [delta]-MnO2, and the pore channels are dense, such that the metal doped layered [delta]-MnO2 has high catalytic oxidation activity and high chlorine resistance, and has efficient catalytic degradation performance on refractory volatile organic compounds in organic waste gas; and the preparation method is simple, and has industrial application value.

The invention relates to a volatile organic compound catalytic oxidation catalyst with a high chlorine poisoning resisting efficiency, and a preparation method thereof. The catalyst adopts RuO2 as anactive component, and adopts a SnyTi1-yO2 or MOx-SnyTi1-yO2 mixed metal oxide as a carrier. TiO2 is doped with Sn to realize the regulation of the crystal form of the carrier oxide, so the dispersiondegree of RuO2 on the surface of the carrier is greatly improved while constructing the tin-titanium-based catalyst carrier with a high activation performance; and the catalyst has the characteristicsof high catalytic activity to chlorine-containing volatile organic compounds, strong chlorine poisoning resistance, and high selectivity of the product to CO2, has a good removal effect on common volatile organic compounds, and can be widely used in treatment of chlorine-containing organic waste gases in the fields of pharmaceutical, organic synthesis and paint spraying.

The invention discloses a catalyst applied to the low temperature catalytic combustion of chlorination aromatic hydrocarbon, and the catalyst refers to alkaline-earth metal modified cobalt oxide, wherein the alkaline-earth metal is magnesium, calcium, strontium or barium, and the molar ratio of cobalt to the alkaline-earth metal is (19 to 1) to (1 to 1). The invention further discloses a preparation method of the catalyst and application of the catalyst in the low temperature catalytic combustion of the chlorination aromatic hydrocarbon. The alkaline-earth metal modified cobalt oxide catalyst provided by the invention has the advantages of simple preparation technology, low price, high catalytic activity, high chlorine poisoning resistance, long service life and the like, and can be used for effectively suppressing chlorination. Under the condition of lower reaction temperature, the catalyst can be used for stably converting the chlorination aromatic hydrocarbon in waste gas into carbon dioxide, chlorine and hydrogen chloride through catalytic combustion for a long time.

The invention discloses a Sn-Mn-Ce-La catalyst. A preparation method of the catalyst comprises the following steps: 1) weighing and dissolving metered Mn(NO3)2, Ce(NO3)3*6H2O, La(NO3)3*6H2O and citric acid in water to obtain a mixed solution, and stirring the mixed solution at the constant temperature of 50-80 DEG C for 5-10 hours to obtain a yellow jelly-like substance; 2) drying the yellow jelly-like substance, adding an aqueous SnCl2*2H2O solution, stirring sufficiently, adding ammonia water dropwise and regulating PH to 9-10 to obtain a precipitate and a mother liquor; and 3) filtering, washing and drying the precipitate and roasting the precipitate in air to obtain the Sn-Mn-Ce-La composite oxide catalyst. The catalyst has higher low-temperature catalysis to eliminate the activity, chlorobenzene can be converted completely at the temperature of 190 DEG C-210 DEG C, and inactivation does not occur when continuous reaction is performed for 30 hours at the temperature of 250 DEG C-300 DEG C.

The invention discloses a composite catalytic filter material for degrading dioxin at low temperature and a preparation method thereof, and belongs to the technical field of waste incineration tail gas treatment. The composite catalytic filter material loaded with a VOx-MnCeOx three-way catalyst is prepared by taking a high-temperature-resistant filter material as a catalyst carrier and the stepsof filter material activation, in-situ precipitation, V active component impregnation and low-temperature plasma oxidation. The catalyst has the advantages that (1) the catalyst has excellent low-temperature activity and selectivity on catalytic degradation of dioxin; (2) the active component V with high activity and excellent chlorine poisoning resistance is added into the filter material, and the V active component is effectively oxidized through low-temperature plasma, so that the catalytic activity and the chlorine poisoning resistance are improved; and (3) the catalyst is uniformly and firmly loaded on the surface of the filter material through an in-situ precipitation method, the preparation conditions are mild, the original performance and stability of the filter material are maintained, and the service life is long.

The invention provides a catalyst for catalytic oxidation elimination of dioxin pollutants in flue gas and waste gas from garbage incinerators, hazardous waste incinerators, medical waste incinerators, steel sintering furnaces, coal-fired power plants, funeral parlors and chemical plants, and a preparation method of the catalyst. According to the catalyst, industrial titanium dioxide is used as acarrier, SnO2-V2O5-WO3 composite oxide is used as an active component, and La2O3, MoO3, CeO2, Nb2O5, CuO, Pr6O11 and Sb2O3 are used as auxiliaries. According to the catalyst, the active components areuniformly dispersed on the surface of the carrier under the complexing action of an organic amine, and the catalyst auxiliaries are uniformly precipitated on the surface of the carrier under the condition of ammonia water, so that the catalyst is high in specific surface area, high in thermal stability and high in chlorine poisoning resistance, can continuously operate for a long time without activation, and is low in activation temperature and high in dioxin decomposition efficiency in dioxin pollutant elimination.

The invention provides a denitration catalyst as well as a preparation method and application thereof. The denitration catalyst comprises CeO2 doped with a Mn compound, wherein a molar ratio of Ce atoms to Mn atoms is (0.2-5):1, an average particle diameter of the denitration catalyst is 1 to 100 nm; a surface of the denitration catalyst has active ions, and the active ions include inorganic acidions. The denitration catalyst provided by the invention has excellent denitration efficiency, is inexpensive and environmentally friendly, and has no obvious toxicity; and in addition, the denitration catalyst can remove chlorine-containing volatile organic compounds while removing nitrogen oxides, has excellent chlorine poisoning resistance, and is suitable for synergistic removal of the nitrogen oxides and the chlorine-containing volatile organic compounds in flue gas in industries such as metallurgy, steel sintering and waste incineration.

The invention discloses a method for removing chlorine-containing volatile organic compounds through catalytic combustion. According to the method, high-temperature-resistant hexaaluminate and pyrochlore materials are used as combustion catalysts, the chlorine-containing volatile organic compounds in air are completely degraded under the action of the catalysts to be converted into carbon dioxide, water, hydrogen chloride and chlorine within the temperature range of 500 DEG C to 1000 DEG C, and tail gas after complete combustion can be exhausted after being absorbed by an alkaline solution. The method provided by the invention overcomes the problems of easy deactivation and easy generation of toxic organic by-products of present catalysts, can effectively avoid the generation of the organic by-products, and does not cause secondary pollution. Under the reaction conditions of the method, the utilized catalysts have the advantages of good catalytic activity, strong chlorine poisoning resistance, long service life, no need of frequent regeneration, strong thermal shock resistance, good high-temperature adaptability, stable performance and the like. The method provided by the invention is suitable for removing halogen-containing organic compounds, especially the chlorine-containing volatile organic compounds.

The invention relates to metal pillared modified layered manganese Birnessite, preparation and applications thereof. According to the present invention, a layered manganese precursor is prepared by adding a settling agent through a hydrothermal method, hydrogen ion exchange and pillaring replacement are performed, a reaction is performed by introducing metal ions, and calaining is performed to obtain the metal pillared modified layered manganese Birnessite. According to the present invention, the prepared catalyst has advantages of high catalytic oxidation activity, high catalytic degradationproperty, high thermal stability and high anti-poisoning ability, and can be used for the catalytic degradation of volatile organic compounds (VOCs) in flue gas; and the preparation method is simple,and has industrial application value.