Catalytic particle filter

FIELD: machine engineering.

SUBSTANCE: filter contains a flow substrate including a plurality of channels. The plurality of substrate channels comprises a plurality of input channels having an open input end and a closed output end and a plurality of output channels having a closed input end and an open output end. The inner walls surface of the plurality of inlet channels comprise a thin layer of at least one input coating composition comprising at least one refractory metal oxide, an optionally stabilized rare earth metal oxide. The outer surfaces of the inner walls of the plurality of outlet channels comprise a thin layer of at least one composition of the wall outlet coating comprising at least one refractory metal oxide, optionally a stabilized rare earth metal oxide. Coatings of the inlet and outlet channels may contain at least one catalytically active metal selected from the group consisting of platinum, palladium, iridium, rhodium, silver, gold, mixtures of any two or more thereof. The outlet coating length along the axis is greater than the inlet coating length along the axis. The invention also provides an exhaust system 40 comprising a catalytic particle filter 8 in accordance with the invention.

EFFECT: reliability increase.

45 cl, 3 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention relates to reduction of diesel emissions. Diesel afterpurification system comprises diesel with exhaust manifold and filter substrate directly connected with exhaust manifold without whatever mid catalysts. Filter substrate inlet side includes selective catalytic reduction catalyst SCR including non-caking molecular sieve.

EFFECT: better filter recovery.

23 cl

FIELD: transport.

SUBSTANCE: set of inventions relates to exhaust system for particulate matter (PM) processing. The exhaust system (10) vehicle (12) internal combustion engine with positive fuel ignition contains filter (20) to filter particulate matter out of exhaust gas released from engine. The filter contains porous substrate with inlet and outlet surfaces. Inlet surfaces are separated from outlet surfaces by porous structure containing pores of medium pore size. The porous substrate is covered with three-way catalyst coating containing multiple solid particles. Porous structure of covered porous substrate contains pores of the second medium pore size, and in this case the second medium pore size is smaller than the first medium pore size. The three-way catalyst coating is on separate substrate monolith (18) located upstream of the filter. Mass of three-way catalyst coating on upstream substrate monolith is ≤75% of total three-way catalyst coating mass in exhaust system.

EFFECT: effective filtration.

18 cl, 7 dwg, 8 tbl

FIELD: engines and pumps.

SUBSTANCE: invention relates to exhaust converter for internal combustion engines. The exhaust converter for internal combustion engines contains a carbamide adder and catalyst for selective recovery of nitrogen oxides (NOx-catalyst) are installed downstream the particulate filter for trapping of particles (filter) in the exhaust channel of the internal combustion engine, meanwhile the SP sensor is placed downstream the filter. According to the present invention in the exhaust channel (2) of the internal combustion engine (1) the first NOx-catalyst (4) and the second NOx-catalyst (5) are placed down stream the filter (3) one by one along the direction of exhaust flow. The carbamide adder (6) is placed between the filter (3) and the first NOx-catalyst (4). The SP (7) sensor is placed between the first NOx-catalyst (4) and the second NOx-catalyst (5).

EFFECT: prevention of worsening of accuracy of measurement of the SP sensor and worsening of accuracy of determination of SP quantity.

2 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to exhaust gas purification. Proposed assembly (1) comprises hydro dynamically communicated at least inlet flow area (2), turn area (3), return flow area (4) and discharge flow area (5). Return flow area (4) and discharge flow area (5) are arranged on outer surface (6) of inlet flow area (2). Besides, proposed device comprises reagent (8) feeder (7). The latter is located in discharge flow area (5). Intention relates also to vehicle wherein exhaust line (19) incorporates at least one proposed assembly (1).

EFFECT: compact design, sparing component of purification by evaporator.

9 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to the system and method of reduction of internal combustion engine exhaust toxicity. The exhaust (2) toxicity reduction system (1) of internal combustion engine (3) with the outlet pipeline (4), where the element (5) for exhaust toxicity reduction is located, which has the first end side (6) and the second end side (7) and is flow-through for exhaust (2) from the first end side (6) to the second end side (7) and at passing of exhaust flow through which the equalization of exhaust flow along the cross section of the outlet pipeline (4) is achieved, being continued along the short sections downstream the element (5) for exhaust toxicity reduction as a section (12) with laminar exhaust flow. Downstream the element (5) for exhaust toxicity reduction the supply unit (8) is provisioned, which is intended for adding of reactant (9) into the exhaust flow (2) and located within this section (12) with laminar exhaust flow at the maximum distance (10) 30 mm, first of all maximum 20 mm, from the second end side (7) of the element (5) for exhaust toxicity reduction, to the second end side (7) of which 90% of the added reactant (9) are supplied.

EFFECT: ensuring of more uniform distribution of the reactant into the exhaust flow, due to that the evaporation of reactant is improved.

13 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to filter for processing solid particles of exhaust gases of whatever combustion process. Filter comprises porous bed with intake and discharge surfaces. Note here that said surfaces are separated by porous structure with pores of the first average size. Note also that said porous structure is coated with coating including multiple solid particles. Note that porous substrate porous structure comprises pores of second average size smaller than that of the first average size. Mind that said coating is a catalytic coating selected from the group consisting of hydrocarbon trap, three-component catalyst, NOx absorber, oxidising catalyst, catalyst of selective catalytic reduction and catalyst for lean NOx. Note also that three-component catalyst comprises platinum and rhodium, palladium and rhodium or platinum, palladium and rhodium on substrate of oxide with high surface area, and component for oxygen store.

EFFECT: efficient cleaning.

35 cl, 6 dwg, 7 tbl, 7 ex

FIELD: process engineering.

SUBSTANCE: invention relates to filter designed to remove solid particles and nitrogen oxides from exhaust gases. Filter comprises porous substrate with inlet and outlet surfaces and substrate pores of the first average size. Note here that said porous substrate is coated by material increasing the surface area. Said material includes molecular sieve promoted by transition metal wherein aforesaid coat represents a porous untreated coat on inlet and/or outlet surface. One of plies has pores of the second average size, smaller than the first one.

EFFECT: balanced backpressure, efficient filtration and catalytic activity.

17 cl, 7 dwg, 3 ex

FIELD: engines and pumps.

SUBSTANCE: invention relates to diesel exhaust gas cleaning system. This system comprises selective catalytic recovery device and diesel carbon-black filter coated at least partially with catalytic layer. Said filter is arranged downstream of said selective catalytic recovery device. The catalytic oxidation device is arranged upstream of said selective catalytic recovery device and/or between said selective catalytic recovery device and carbon-black filter. Device to inject controlled amount of reducing agent is arranged at selective catalytic recovery device inlet. Device to inject controlled amount of hydrocarbons is arranged ahead of catalytic oxidation.

EFFECT: efficient cleaning and recovery.

14 cl, 6 dwg, 1 ex

FIELD: machine building.

SUBSTANCE: exit gas cleaning device (11) includes at least the following: at least partially electrically conducting first honeycomb body (12) with the first front side (3) and the first rear side (26), at least partially electrically conducting second honeycomb body (13) with the second front side (25) and the second rear side (27), intermediate space (15) between the first honeycomb body (12) and the second honeycomb body (13), electric power supply source (18) for creation of electric potential between the first honeycomb body (12) and the second honeycomb body (13), as well as several electrodes (6) that are fixed on the first honeycomb body (12), spread to intermediate space (15) through the first rear side (26) to the first length (8) and located at the first distance (16) before the second front side (25) of the second honeycomb body (13). Besides, cleaning method of automobile exit gases containing soot particles is described.

EFFECT: providing compactness, possibility of accurate control of electric field in order to perform effective exit gas cleaning.

10 cl, 6 dwg

Fuel dosing device // 2490483

FIELD: engines and pumps.

SUBSTANCE: fuel dosing device at the point before an oxidation catalyst in outlet path (36) of an internal combustion engine. In the flow direction after fuel feed device (72) located is shutoff valve (54) and/or injector (40), which are integrated into dosing unit (48) fuel pipeline. From that fuel pipeline at the point before dosing unit (48) there branched is drain fuel pipeline (82) with the first bypass valve (80) located in it. At the point between shutoff valve (54) and dosing valve (56) there branched is one more drain fuel pipeline (88) with valve (80) located in it, which influences middle pressure level in dosing unit (48).

EFFECT: minimisation of pressure surges, minimisation of occurrence of signals proportional to peak pressure values in a dosing device, and in an exhaust gas outlet system respectively, due to which damage to individual units is excluded.

14 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: control device for an internal combustion engine includes the following: a solid particle sensor installed in an exhaust pipe of an internal combustion engine, a filter for catching particles, which can catch solid particles contained in exhaust gas and is located in the exhaust pipe at the point upstream relative to the solid particle sensor; an electronic control unit that can detect the amount of particles in the exhaust gas through the exhaust pipe in response to an output signal of the solid particle sensor; an electronic control unit having a possibility of supplying particle capture voltage between electrodes of the solid particle sensor during the first period so that a layer of particles can be formed on surfaces of electrodes of the solid particle sensor; and an electronic control unit having a possibility of stopping particle capture voltage supply during the second period so that the layer of particles can be maintained, and an electronic control unit that can perform control by detection of a failure in order to determine whether there is a failure of the filter for particle catching or not. The first period represents a period between completion of control by detection of the failure and the moment when the output signal of the solid particle sensor achieves a reference output signal. The second period represents a period between the moment when the output signal of the solid particle sensor achieves the reference output signal.

EFFECT: improved serviceability of a control unit and high measurement accuracy of the amount of solid particles.

9 cl, 7 dwg

FIELD: instrumentation.

SUBSTANCE: invention can be used for monitoring of a condition of the catalyst of the internal combustion engine exhaust gases. The method of assessment of the index (I) of aging of the catalytic device (K) consists in determination of the working temperature (T) of the catalyst. The aging factor (F) is determined against the working temperature (T), the period of time (t) during which the catalytic device was at a working temperature (T) is determined. Then the accompanying aging coefficient (C) is determined against the aging factor (F) and the period of time (t), and the total aging parameter (P) is increased by means of adding of the accompanying aging coefficient (C).

EFFECT: improvement of accuracy of determination of overall performance.

12 cl, 3 dwg

FIELD: transport.

SUBSTANCE: proposed air cleaner comprises vehicle structural part with air intake and air discharge hole, internal flow channel communicating air intake with air discharge hole and ozone cleaning element. Ozone cleaning element is applied on internal flow channel wall to clean ozone by converting it into other substances. Amount of applied ozone cleaning element on the side of air intake is larger than that applied on the side of air discharge hole. Thus, probability of active oxygen contact with activated carbon can be reduced.

EFFECT: creation of DOR-system to prevent deterioration of ozone cleaning function.

9 cl, 10 dwg

FIELD: transport.

SUBSTANCE: set of inventions relates to vehicle devices. Insert for holder in aftertreatment unit for exhaust gases of internal combustion engine contains bushing for treatment component intended for passing exhaust gases through it which gases should be treated, connecting facilities to hold insert in required position in holder, and seals for gas-tight sealing of bushing relative to holder. The seals contain O-ring on bushing to interact in self-aligning fitment engagement with opposite O-ring in the holder. The O-ring is located in angular notch of bushing, while connecting facilities contain threaded connection having male thread on the bushing for engagement with thread on holder, where external end of bushing has notch located at the periphery for connecting and disconnecting tool.

EFFECT: higher reliability of sealing in connection.

8 cl, 8 dwg

FIELD: engines and pumps.

SUBSTANCE: diesel system comprises diesel, NOx emission reducer arranged downstream of the engine, exhaust line between said engine and said NOx emission reducer. Besides, it comprises bypass line with first end connected to discharge line upstream of NOx emission reducer and bypass valve connecting discharge line with bypass line. Note also that said bypass valve directs offgas flow from discharge line into NOx emission reducer in open state and inhibits from discharge line into said reducer in closed state to allow the flow from discharge line into bypass line. Note that controller can be used for bypass valve opening and closing when engine operating conditions reach preset level.

EFFECT: efficient operation of NOx catalytic reduction unit or catcher.

19 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing cerium dioxide nanoparticles and use thereof. Described is a method of producing cerium dioxide nanoparticles with a given lattice, which contain at least one transition metal (M), wherein: (a) an aqueous reaction mixture is prepared, said mixture containing a source of Ce3+ ions, a source of ions of one or more transition metals (M), a source of hydroxide ions, at least one nanoparticle stabiliser and an oxidant which oxidises the Ce3+ ion to a Ce4+ ion, at initial temperature ranging from about 20°C to about 95°C; (b) mechanical shearing of said mixture and passing said mixture through a perforated sieve to form a homogeneously distributed suspension of cerium hydroxide nanoparticles; and (c) creating temperature conditions that are effective for oxidation of the Ce3+ ion to a Ce4+ ion to form a product stream containing cerium dioxide nanoparticles, containing a transition metal Ce1-xMxO2, where x assumes a value from about 0.3 to about 0.8, said nanoparticles have a cubic fluorite structure, average hydrodynamic diameter ranging from about 1 nm to about 10 nm and geometric diameter from about 1 nm to about 4 nm, wherein the nanoparticle stabiliser is water-soluble and has a value Log KBC ranging from 1 to 14, where KBC denotes a constant for binding the nanoparticle stabiliser to a cerium ion in water and said temperature conditions that are effective for oxidation of the Ce3+ ion to a Ce4+ ion include temperature from about 50°C to about 100°C. Described is a method of preparing a homogeneous dispersion containing stabilised crystalline nanoparticles of cerium dioxide with a given lattice, containing a transition metal, Ce1-xMxO2, where M is at least one transition metal and x assumes a value from about 0.3 to about 0.8; (a) preparing an aqueous mixture which contains stabilised cerium dioxide nanoparticles containing a transition metal, Ce1-xMxO2, having a cubic fluorite structure, wherein, wherein said nanoparticles have average hydrodynamic diameter ranging from about 1 nm to about 10 nm and geometric diameter less than about 4 nm; (b) concentrating said aqueous mixture containing said stabilised cerium dioxide nanoparticles containing a transition metal, thereby forming an aqueous concentrate; (c) removing essentially all water from said aqueous concentrate to form an essentially water-free concentrate of stabilised cerium dioxide nanoparticles containing a transition metal; (d) adding an organic diluent to said essentially water-free concentrate to form an organic concentrate of said stabilised cerium dioxide nanoparticles containing a transition metal; and (e) merging said organic concentrate with a surfactant in the presence of a nonpolar medium to form said homogeneous dispersion containing stabilised crystalline nanoparticles of cerium dioxide containing a transition metal, Ce1-xMxO2, where M and x assume values given above. Described is a deposited coating for the catalytic converter of the exhaust system of an internal combustion engine, where said deposited coating is obtained using said homogeneous dispersion.

EFFECT: catalyst that is efficient for a reduction or oxidation reaction is described, where said catalyst is obtained using said homogeneous dispersion.

44 cl, 9 dwg, 2 tbl, 8 ex

FIELD: engines and pumps.

SUBSTANCE: system 1 to process waste gases formed in operation of preset capacity ICE 2 comprises waste gas circulation pipeline 4. Waste gases flowing in said pipeline in direction 9 interact with turbosupercharger 5. Gause layer 6 is arranged upstream of said turbo supercharger. Cross section area of said layer exceeds averaged cross section area 8 of pipeline 4. Proposed system differs from known designs in that said gauze layer 6 comprises woven screen made up of thin wires 11 with major part of openings 12 features width 13 varying from 0.1 to 0.25 mm, said wires incorporating different types of thin wires of varying thickness.

EFFECT: longer life, higher efficiency.

9 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to carrier housing for catalytically active coat used for afterpurification of automotive exhaust gases. Carrier housing 1 with total surface area 7 that has one section 8 of the coat with catalytically active coat 2 comprising at least one type catalyst elements 32 dispersed on surface 35 of carrier housing1. Note here that: catalyst elements 32 features mean spacing 34 along the surface equal to at least 3 mcm, surface 35 has mean roughness depth Rz equal to 2 to 10 mcm. Carrier housing 1 features maximum increase in head drop equal to 25% as compared with smooth-surface housing. Method of producing above described carrier housing 1 with total surface area 7 with at least one section 8 with catalytically active coat 2, comprises the following steps: a) preparing carrier housing 1 with smooth surface (35); b) determining head drop for said housing at preset ambient conditions; c) producing surface (35) with mean roughness depth Rz, equal to 2 to 10 mcm. Carrier housing 1 features maximum increase in head drop equal to 25% as compared with smooth-surface housing; d) arranging catalyst elements (32) dispersed along the surface with mean spacing 34 of at least 3 mcm. Invention covers also exhaust gas purification device 25 incorporating at least one carrier housing 1 produced as described above, and transport facility incorporating said device.

EFFECT: improved conversion of harmful substances in afterpurification of exhaust gases.

20 cl, 10 dwg

FIELD: transport.

SUBSTANCE: invention relates to exhaust gas purification catalysts, particularly to adsorbent intended for removal of hydrocarbons from exhaust gases in cold starting. Proposed adsorbent represents an organometallic MOF-5-type carcass structure with residues of terephthalic or biphenyl dicarboxylic acid that makes a linking element. Points of cubical lattice comprise clusters that represent fragments of inorganic metallate oxide polyhedrons containing ions of zinc, or copper, or cobalt.

EFFECT: efficient hydrocarbons adsorbent.

1 tbl, 1 ex

FIELD: power industry.

SUBSTANCE: device for conversion of waste gas components of internal combustion engine with the help of at least one catalyst and/or particle filter, and/or particle trap and for levelling of relative movements between internal combustion engine and waste gas path and/or relative movements of different parts of waste gas path with the aid of at least one compensating pipe that allows relative movements. Note that at least one catalyst for waste gas components conversion and/or at least one particle filter and/or at least one particle trap is located inside the compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z) and/or inside the part of waste gas path that is integrated with compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z). The outer diametre of catalyst and/or particle filter and/or particle trap is less or equal to the inner diametre of compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z).

EFFECT: decrease of structural size.

15 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to exhaust gas cleaning. Proposed device (1) to decrease toxicity of offgas containing solid particles (2) sintering unit (3) and solid particles trap (4). Said solid particles sintering unit (3) comprises at least one unit (5) to induce electric field (6) and offgas flow mid accumulator (7) arranged in direction of offgas flow (8) upstream of trap (4) composed of filter (13) with permeable walls of channels or a multiflow filter (14). Mid accumulator (7) of solid particles is connected with electric pole (9) and has at least one exposed structure (10) with multiple passages (11). This allows a directed deposition of solid particles (2) by electric field on said mid accumulator (7). Besides, said particle get in contact with each other to get compacted owing to their inclination to sticking. When solid particle (2) size grows to required value at said mid accumulator (7), consolidated particles are trapped by offgas flow and displaced thereby into said trap (4).

EFFECT: efficient catching of solid particles in offgas intake system even at low pressure drop.

9 cl, 9 dwg

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