The catalyst for reduction of nitrogen oxides by hydrocarbons in an oxidizing atmosphere and method thereof
(57) Abstract:Usage: in catalytic chemistry, in particular in the catalysts for purification of any gas in an oxidizing atmosphere containing flue gases of thermal power plants, exhaust gases of cars, as well as gases from nitric acid production. The inventive catalytic oxide composition f-ly 1: MeO-ZrO2where IU CA, Sr, Ba, Y, Ce; composition MeO 2 10 mol. and the rest of ZrO2or f-crystals 2: Al2O3-SrO-ZrO2composition (in mol.): Al2O3-25,0-50,0 ZrO 2,5 - 3,8, ZrO2-47,5-71,2. The compositions of f-crystals 1 are given either by coprecipitation of the components or by mixing for f-crystals 2 and subsequent stages of forming, drying and calcination at 700 100°C. These catalysts provide a 100% degree of conversion of oxides of nitrogen at the reaction temperature recovery of hydrocarbons in an oxidizing atmosphere. 2 S. and 1 C.p. f-crystals, 1 table. The invention relates to catalysts for efficient removal of nitrogen oxides in oxidizing conditions and the method of obtaining them, characterized by a high degree of purification, selectivity, chemical and thermal stability. The proposed catalyst is effective for cleaning of any gas with an oxidizing atmosphere, stereoty.The nature of the catalyst and technological design process flue gas (EXHAUST gas) from the NOxdepend on the ratio of (a) oxidizing and reducing components in the EXHAUST gas, and restorative components, namely:
1. If = 1, then the most common catalytic systems used in these cases are the metals Cu, Pd, Pt, Rh deposited on porous media (Al2O3, ZrO2, zeolites) . However, these catalysts do not provide efficient purification from nitrogen oxides in an oxidizing atmosphere containing a large amount of oxygen.2. If >1 (such oxidizing mixture formed from internal combustion engines, by operation of a thermal power plant, and so on), then there are two variants of the process:
(a) For cleaning the EXHAUST gas from the NOxuse the method of selective catalytic reduction of NOxthe ammonia. For this process using the catalysts, in which the role of the active component performs deficient oxides of vanadium, tungsten, titanium  While there are difficulties associated with transporting, storing and regulating the supply metered quantities of ammonia.b) For purification of EXHAUST gas from and NOxprimadaya composition Cu/zeolite , Cu/Al2O3, Cu/Al Si O  the copper content varies in the range 2-5%
The specified catalyst  is the closest to the proposed. The method of obtaining this catalyst is repeated impregnation of porous media (zeolite) with a solution of nitrate of copper at a temperature of 80aboutWith; and then washed with water, dried at 110aboutS, 12 h and calcined at 600aboutC, 3 hours the Catalyst may have a different shape: granules in the form of cuttings, blocks cell structure.The main disadvantage of this catalyst is relatively low degree of purification from the NOx. The degree of conversion of NOxdepending on the reaction temperature passes through a maximum value corresponding to the temperature of 500aboutFrom  which makes it impossible to increase the degree of conversion by increasing the reaction temperature. In addition, it should be noted the technological complexity of the preparation of the catalyst, due to the presence of multiple impregnation.The aim of the invention is to obtain a catalyst to achieve a high degree of purification from the NOxby restoring the last hydrocarbons in the presence of excess oxygen, the possession is the catalyst based on ZrO2containing MeO < 10 mol. where IU CA, Sr, Ba, Al, Y, Ce, representing cuttings of size 2,5x3,5 mm; and the catalyst Al-Sr-Zr-O containing 25Al2O350 mol. and SrO 2-10 mol. the rest of ZrO2representing tube dimensions: dEXT2.5 mm and dint.1 mm, 15-20 mm l or microblock in the form of a hexagon with triangular channels and a wall thickness of 1 mm, the Number of channels in the cross-section of microbiota was 24-30 pieces. The proposed catalysts are received either by the deposition of the components, or their mixture with the subsequent stages of forming, drying and calcination at appropriate temperatures.Distinctive features of the proposed catalyst are:
1. The nature of the active component, which is based on ZrO2with the addition of MeO, where Me is Ca, Sr, Ba, Al. Y, Ce; or Al2O3-SrO-ZrO2.2. The method of preparation of the catalyst, consisting either in the deposition of the respective components or the mixture of fresh and dried binary or ternary compositions.3. Other temperature range of formation of the catalyst.A distinctive feature of the proposed catalyst for purification of EXHAUST gas from the NOxby catalytics Oginga composition for this process, which would not reduce the degree of conversion of NOxwith increasing reaction temperature, which allows to achieve 100% conversion of NOx.The catalytic properties of the samples prepared in accordance with the foregoing compositions and method of synthesis, in the reduction reaction of NOxwas evaluated by the degree of conversion of NO to the standard mixture: 1000 ppm NO, 1300 ppm C3H8, 1 vol. ABOUT2the rest is Not at flow rate of 4000 h-1. For some catalysts was studied the influence of the oxygen content of the mixture (CO21 -10 about.) and volumetric flow rate (V 4000-32000 h-1on the activity of the samples.In addition, evaluated the degree of conversion of propane to co and CO2.Source materials used in the synthesis of the catalyst, get:
ZrO(NO3)22H2O under MRTU 6-09-2376-65, followed by dissolving in NGO3and distilled H2About when obtaining a solution with a concentration of 100 g ZrO2/lCAC2ABOUT4H2About under MRTU 6-09-6656-70, followed by dissolving in distilled H2About when obtaining a solution with a concentration of 100 g Cao/literSr(NO3)2according to THE 5429-50 with subsequent dissolution soglasno GOST 3777-69, followed by dissolving in distilled H2About when obtaining a solution with a concentration of 100 g BaO/L.AlOOH1,5H2About powder perezajennogo aluminum hydroxide pseudoboehmite structure with a particle size of 15 μm, produced by nitrate-ammonia technology.P R I m e R 1. Salt solution obtained by mixing an 11.7 ml CAC2ABOUT4and 488,3 ml solution of ZrO(NO3)2, precipitated with ammonia solution at pH 9 and 70aboutWith subsequent keeping the suspension under these conditions for 2 h, after which the suspension was filtered, the precipitate washed with distilled water until no nitrate in the filtrate; the resulting paste is molded in the form of cuttings, and then dried at 110aboutS, 12 h and calcined in a stream of air for 4 h at 700aboutC. the resulting catalyst has the composition: 5 mol. CaO 95 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m m e R 2. Similar to example 1. The difference is that the deposition serves the solution obtained by the mixture of 8.5 ml of Sr(NO3)2and 491,5 ml ZrO(NO3)2. The resulting catalyst has the composition: 2 mol. SrO, 98 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 3. UB>2and 478,8 ml ZrO(NO3)2. The resulting catalyst has the composition: 5 mol. SrO and 95 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 4. Similar to example 1. The difference is that the deposition submit a solution obtained by mixing and 42.7 ml of Sr(NO3)2and 457,3 ml ZrO(NO3)2and the calcination is carried out at 720aboutC. the resulting catalyst has the composition: 10 mol. SrO 90 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 5. Similar to example 1. The difference is that the deposition submit a solution obtained by mixing a 30.7 ml of Ba(NO3)2and 469,3 ml ZrO(NO3)2and the calcination is carried out at a temperature of 750aboutC. the resulting catalyst has the composition: 5 mol. HLW 95 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 6. Similar to example 1. The difference is that the deposition submit a solution obtained by mixing 48.6 ml Y(NO3)3and 451,4 ml SrO(NO3)2. The resulting catalyst has a composition of 10 mol. Y2O3, 90 mol. ZrO2, physico-chemical and catalytic properties which bring the PRS, the obtained mixture of 61.5 ml of Ce(NO3)3and 438,5 ml ZrO(NO3)2. The resulting catalyst has the composition: 5 mol. Ce2O3, 95 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 8. 161 g wet paste obtained according to the procedure described in example 3, containing 80.2% of N2Oh, is mixed with 80 g of dry powder transitionally composition of the same composition in the Z-shaped mixer for 15 minutes the resulting paste is molded by extrusion in the form of tubes dimensions: dEXT.7.8 mm, dint.4 mm, the Sample is dried for 20 h in air, then in a drying Cabinet at 110aboutS, 12 h, the Calcination is carried out in a muffle furnace at 700aboutWith 4 hours. The resulting catalyst has the composition: 5 mol. SrO; 95 mol. ZrO2physico-chemical and catalytic properties of which are given in the table.P R I m e R 9. Analogous to example 8. The difference lies in the fact that the sample calcined at 900aboutC. the resulting catalyst has the composition: 5 mol. SrO; 95 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 10. Analogous to example 8. The difference is that mixed with 145 g of ZrO(OH)2with the second catalyst calcined in a muffle furnace at 1000aboutC, 4 h the resulting catalyst has the composition: 75 mol. Al2O3; 25 mol. ZrO2. Physico-chemical and catalytic properties of which are given in the table.P R I m e R 11. Analogous to example 8. The difference is that the mix is 37.2 g of powder perezajennogo aluminum hydroxide with 66,9 g of dry powder transitionally composition obtained according to example 3, and to 123.5 g wet transitionally compositions containing 83,8% N2About; the resulting paste is molded in the form of microblocks, air-dried for 20 h, then in a drying Cabinet at 110aboutS, 12 h, the Calcination is carried out in a muffle furnace at 900aboutC. the resulting catalyst has the composition: 25 mol. Al2O3; of 3.8 mol. SrO; 71,2 mol. ZrO2, physico-chemical and catalytic properties of which are given in the table.P R I m e R 12. Analogous to example 11. The difference is that mix 77,8 g perezajennogo aluminum hydroxide with 37 g of dry powder transitionally composition and 144,4 g wet transitionally compositions containing 83,8% N2O. the resulting catalyst has the composition: 50 mol. Al2O3; 2,5 mol. SrO and 47.5 mol. ZrO2, physico-chemical and catalytic properties of which are given in eacli recovery NO by hydrocarbons in an oxidizing atmosphere. It should be noted that in the prototype as a reducing agent was used more reactive hydrocarbon is propylene, and offer more sustainable propane. According to  the same degree of conversion of NOxunder comparable reaction conditions in the case of propylene is achieved at temperatures in the 100aboutC lower than when using propane. But even with this in mind, the table shows that tranzitionale catalysts under comparable reaction conditions on the activity are not inferior to the prototype. The proposed activity of the catalysts increases significantly, reaching 100% degree of conversion of NO, by changing reaction conditions:
1. The higher oxygen content in the original reaction mixture (table). This makes possible the application of the proposed catalysts for neutralization of mixtures with a high content of oxygen.2. Increasing the reaction temperature. If we take into account that the catalysts obtained according to the prototype  raising the reaction temperature is accompanied by a reduction in the degree of conversion of NO, the proposed catalysts are more efficient and heat-resistant. This predlagajemaja catalysts (table).Introduction to composition MeO-ZrO2where Me is Ca, Sr, Ba, Y, Ce, Al2O3in the amount of 25-50 mol. reduces the efficiency of the catalysts, however, it is higher than on the prototype, at higher temperatures the reaction (table). In addition, it allows to obtain catalysts in the form of tubes, microblocks that, in turn, contributes to a more rational design process of purification of the EXHAUST gas and reduces the loading of the catalyst. The latter is confirmed by the fact that when using the catalyst in the form of microbiota weighed samples were approximately 2.5 times less than when using cuttings, obtained by deposition (see table). 1. The catalyst for reduction of nitrogen oxides by hydrocarbons in an oxidizing atmosphere, characterized in that it is a composition MeO ZrO2where Me is Ca, Sr, Ba, Y, Ce, composition mol.MeO 2 10
or composition of Al2O3SrO ZrO2composition, mol.Al2O325,0 50,0
SrO 2,5 3,8
2. The method of producing catalyst for reduction of nitrogen oxides by hydrocarbons in an oxidizing atmosphere, characterized in that the components of the composition MeO ZrO2where Me is Ca, Sr, Ba, Y, Ce, taken in the ratio of 2 to 10 mol. in the or ammonia with subsequent stages of formation, drying and calcination at 700 - 750oC.3. The method of producing catalyst for reduction of nitrogen oxides by hydrocarbons in an oxidizing atmosphere, characterized in that mix 25 to 50 mol. in terms of Al2O3perezajennogo aluminum hydroxide and 50 to 75 mol. on calcined strontium-zirconium composition SrO ZrO2obtained by coprecipitation from solutions of salts with an aqueous solution of ammonia, followed by the stages of forming, drying and calcination at 700 - 1000oC.
FIELD: gas treatment catalysts.
SUBSTANCE: invention, in particular, relates to internal combustion engine exhaust gas neutralizers. Method of invention comprises rolling refractory metallic tape into block by way of overlapping its smooth and corrugated sides to form channels, performing ultrasound-assisted chemical cleaning of thus rolled tape in alkali solution followed by joining alternate layers of metallic tape with each other by diffusion welding in vacuo within a range of 5·10-5-1·10-5 mm Hg using stepwise heating to 1250 ± 10°С and isothermal exposure to this temperature for 12-17 min to form monolithic structure consisting of triangular and trapezoidal channel at density up to 600 channels per 1 inch2. Invention further describes carrier for catalytic exhaust gas neutralizers representing monolithic metallic structure in the form of cylindrical block or block with oval cross-section, which block consists of parallel channels, 200-600 per 1 inch2, density of channels varying along the cross-section of carrier: from center and extending to 0.55 0,7 diameter if cylindrical block or large axis of oval cross-section, density of channels is 400-600 per 1 inch2 and farther it decreases to 200 or 400 channel/inch2, respectively.
EFFECT: simplified manufacture technology and increased strength of monolithic cellular structure.
4 cl, 4 dwg, 1 tbl
FIELD: exhaust gas neutralization catalysts.
SUBSTANCE: catalyst contains at least one zeolite and additionally at least one oxide carrier selected from alumina, silica, titanium dioxide, and aluminum silicate, and also at least one precious metal selected from platinum, palladium, rhodium, and iridium. The latter are characterized by average oxidation degree below +2.5, average number of metal ligands more than 3, and average number of oxygen ligands less than 3, whereas precious metal atoms are present on zeolites and oxide carriers in the form of crystallites with average particle size 1-6 nm. Catalyst is prepared on an solid cellular element, for which oxide carriers and zeolites are first separately impregnated with precious metal precursors and then calcined in yet wet state by blowing them into gaseous combustion gases at 500-1000°C for 0.1 to 10 sec. Thereafter, common coating dispersion is processed, which is further used to coat solid cellular element. Coating is then dried, calcined, and reduced.
EFFECT: increased catalytic activity, prolonged lifetime of catalyst, and lowered minimum working temperature at which carbon monoxide and hydrocarbons start being catalytically converted.
10 cl, 8 tbl, 11 ex
FIELD: physical or chemical processes and apparatus.
SUBSTANCE: method comprises flowing air through the chemical absorber of nitrogen acids that is composed of chemically absorbing base that absorbs nitrogen dioxide and sorbent-oxidizer that oxidizes nitrogen mono-acid up to nitrogen dioxide. The chemical absorber is made of n pairs of layers of chemically absorbing base and sorbent-oxidizer. Upon flowing throughout n pairs of the layers, the initial concentration of the nitrogen dioxide drops by a factor of 3n, where n is the total number of pairs of the layers.
EFFECT: reduced cost and enhanced efficiency.
2 cl, 1 tbl
FIELD: production of catalytic neutralizers.
SUBSTANCE: high-efficiency catalytic neutralizer has internal and external layers on inert carrier which contain noble metals of platinum group deposited on materials of base and oxygen-accumulating components. Inner layer of proposed catalytic neutralizer contains platinum deposited on first base and first oxygen-accumulating component and its external layer contains platinum and rhodium deposited on second base only; this second layer contains additionally second oxygen-accumulating component. Production of catalytic neutralizer includes application of coat on carrier made from composition containing powder-like materials including first material of base and first oxygen-accumulating component followed by drying, calcining, immersing the carrier with coat in solution of platinum precursor; coat is calcined and external layer is applied over previous layer. Specification describes two more versions of production of catalytic neutralizer.
EFFECT: enhanced ability of catalytic neutralizer for reduction of catalytic activity after aging due to discontinuation of delivery of fuel.
24 cl, 1 dwg, 11 tbl, 5 ex, 3 ex
FIELD: gas treatment.
SUBSTANCE: invention relates to novel catalysts, which can be, in particular, used in automobile engine exhaust treatment, in processes of deep oxidation of toxic organic impurities in industrial emission gases, and in other applications. Adsorption-catalytic system, including granules of sorbent capable of sorbing at least one of reagents and catalyst, represents geometrically structured system wherein catalyst is made in the form of microfibers 5-20 μm in diameter, sorbent granules are disposed inside catalyst, and size ratio of sorbent granules to catalyst microfibers is at least 10:1. Catalyst microfibers are structured in the form of woven, knitted, or pressed material. Gas treatment process involving use of such system is based on that gaseous reaction mixture to be treated is passed through above-defined system while periodically varying temperature of mixture, in particular raising it, to accomplish or regeneration of sorbent.
EFFECT: enhanced process simplicity and reliability (simple process government system, absence of mechanical stream switching devices, reduced power consumption, and enabled continuous gas treatment.
2 cl, 2 ex
FIELD: removal of soot particles from exhaust gases during operation of internal combustion engines.
SUBSTANCE: proposed method consists in passing the exhaust gas flow through flow-type trap. Some particles are entrapped in trap in swirled state during such period of time when probability of their interaction with nitrogen dioxide contained in exhaust gases exists till complete elimination of entrapped particles. Trap has flow passages for free flow of exhaust gases for forming swirling or dampening zones.
EFFECT: avoidance of choking of trap by solid particles, thus ensuring continuous regeneration; reduced losses of pressure in trap.
9 cl, 3 dwg
FIELD: catalyst preparation methods.
SUBSTANCE: invention relates to a method for preparing catalyst and to catalyst no honeycomb-structure block ceramic and metallic carrier. Preparation procedure includes preliminarily calcining inert honeycomb block carrier and simultaneously applying onto its surface intermediate coating composed of modified alumina and active phase of one or several platinum group metals from water-alcohol suspension containing, wt %: boehmite 15-30, aluminum nitrate 1-2, cerium nitrate 4-8, 25% ammonium hydroxide solution 10-20, one or several precipitate group metal salts (calculated as metals) 0.020-0.052, water-to-alcohol weight ratio being 1:5 to 1:10; drying; and reduction. Thus prepared catalyst has following characteristics: specific coating area 100-200 m2/g, Al2O3 content 5-13%, CeO2 content 0.5-1,3%, active phase (on conversion to platinum group metals) 0.12-0.26%.
EFFECT: simplified technology due to reduced number of stages, accelerated operation, and high-efficiency catalyst.
5 cl, 1 tbl, 10 ex
FIELD: gas treatment catalysts.
SUBSTANCE: invention provides catalyst consisted of inert carrier and catalytic coating containing platinum, rhodium, and oxide substrate, wherein catalytic coating includes: (i) at least one first substrate material selected from group consisted of first active aluminum oxide enriched with cerium oxide; mixed oxide, which is cerium oxide/zirconium dioxide; and zirconium dioxide component; provided that catalytic component in at least one first substrate material is first portion of the total quantity of catalyst platinum, wherein concentration of the first portion of the total quantity of catalyst platinum lies within a range of 0.01 to 5.0% of the total mass of catalyst-containing materials; and (ii) a second substrate material containing second portion of total quantity of platinum and rhodium as catalytic component, said second substrate material being second active aluminum oxide, wherein concentration of platinum plus rhodium on the second substrate material lies within a range of 0.5 to 20% of the total mass of the second substrate material. Method for preparing above catalyst is also provided.
EFFECT: increased catalytic activity and reduced catalyst preparation expenses.
17 cl, 3 dwg, 5 tbl, 3 ex
FIELD: oxidation catalysts.
SUBSTANCE: invention relates to oxidation catalysts that can be, in particular, used for complete oxidation of volatile organic compounds into CO2 and H2O. Catalyst according to invention contains mixed copper, manganese, and lanthanum oxides, wherein metals can assume multiple oxidation states and whose chemical analysis expressed for metals in lowest oxidation states is the following: 35-40% CuO, 50-60% MnO, and 2-15% La2O3.
EFFECT: enhanced stable catalytic activity and resistance to caking.
11 cl, 2 tbl, 2 ex
FIELD: chemical industry; materials and the methods for the catalyst carrier manufacture.
SUBSTANCE: the invention is pertaining to the new mixed oxides produced from ceric oxide and zirconium oxide, which can used as the catalyzers or the catalyzers carriers for purification of the combustion engine exhaust gases. The mixed oxide possesses the polyphase cubical form of the crystallization and oxygenous capacity of at least 260/ micromoles of O2 /g of the sample and the speed of the oxygen extraction of more than 1.0 mg-O2/m2-minute, which are measured after combustion within 4 hours at the temperature of 1000°C. The invention also presents the substrate with the cover containing the indicated mixed oxide. The method of production of the polycrystallic particles of the indicated mixed ceric-zirconium oxide includes the following stages: i) production of the solution of the mixed salt which are containing, at least, one salt of cerium and, at least, one salt of zirconium in the concentration, sufficient for formation of the polycrystallic particles of the corresponding dry product on the basis of the mixed oxide. At that the indicated particles have the cerium-oxide component and zirconium-oxide component, in which these components are distributed inside the subcrystalline structure of the particles in such a manner, that each crystallite in the particle consists of a set of the adjacent one to another domains, in which the atomic ratios of Ce:Zr which are inherited by the adjacent to each other domains, are characterized by the degree of the non-uniformity with respect to each other and determined by means of the method of the X-ray dissipation the small angles and expressed by the normalized intensity of the dissipation I(Q) within the limits from approximately 47 up to approximately 119 at vector of dissipation Q, equal to 0.10 A-1; ii) treatment of the solution of the mixed salt produced in compliance with the stage (i),with the help of the base with formation of sediment; iii) treatment of the sediment produced in compliance with the stage (ii),using the oxidative agent in amount, sufficient for oxidizing Ce+3 up to Ce+4; iv) washing and drying of the residue produced in compliance with the stage (iii); and v) calcination of the dry sediment produced in compliance with the stage (iv),as the result there are produced polycrystallic particles of the oxide of ceric and zirconium in the form of the mixed oxide with the above indicated characteristics. The technical result is the produced mixed oxide possesses both the high oxygenous capacitance, and the heightened speed of the oxygen return in the conditions of the high temperatures.
EFFECT: the invention ensures production of the mixed oxide manufactured from ceric oxide and zirconium oxide and possessing the high oxygenous capacitance and the heightened speed of the oxygen return in the conditions of the high temperatures.
68 cl, 21 ex, 2 dwg
FIELD: petrochemical process catalysts.
SUBSTANCE: catalyst constitutes cements formed during heat treatment and depicted by general formula MeO·nAl2O3, where Me is at least one group IIA element and n is number from 1.0 to 6.0, containing modifying component selected from at least one oxide of magnesium, strontium, copper, zinc, indium, chromium, manganese, and strengthening additive: boron and/or phosphorus oxide. The following proportions of components are used, wt %: MeO 10.0-40.0, modifying component 1.0-5.0, boron and/or phosphorus oxide 0.5-5.0, and alumina - the balance. Catalyst is prepared by dry mixing of one group IIA element compounds, aluminum compounds, and strengthening additive followed by mechanochemical treatment on vibromill, molding of catalyst paste, drying, and calcination at 600-1200°C. Modifying additive is incorporated into catalyst by impregnation and succeeding calcination. Method of pyrolysis of hydrocarbon feedstock producing C2-C4-olefins is also described.
EFFECT: increased yield of lower olefins.
3 cl, 2 tbl, 18 ex
FIELD: industrial organic synthesis catalysts.
SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at median pressure and provides catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, boron, and barium and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3:BaO = 1:0.3:(0.014-0.038):(0.047-0.119):(0.05-0.1):(0.007-0.014):(0.0292-0.054).
EFFECT: increased mechanical strength and wear resistance of catalyst.
FIELD: reduction-oxidation catalysts.
SUBSTANCE: invention relates to catalysts for deep oxidation of carbon monoxide that can be used to treat industrial emission gases and motor transport exhaust gases. Aluminum-based oxidation catalyst contains 1.3-5.1% of rare-earth and/or alkali-earth element and represents ultradisperse powder.
EFFECT: increased catalytic activity.