13 results about "Automotive catalyst" patented technology

This application provides a method for enhanced precious metal recovery and full-component utilization through plasma synergistic melting, relating to the field of solid waste recycling. The method involves first mixing solid waste and a reducing agent to obtain a first mixture; then, under a working atmosphere, plasma melting of the first mixture yields high-temperature liquid slag, a liquid matte phase, and a liquid alloy phase; the liquid matte phase and the liquid alloy phase are respectively subjected to hydrometallurgical recovery of precious metals; the high-temperature liquid slag is water-quenched to obtain glass frit; the glass frit is ground and dried to obtain treated glass frit; the treated glass frit and a binder solution are second-mixed to obtain a second mixture; the second mixture is then molded and heat-treated to obtain microcrystalline glass; the solid waste includes waste automotive catalysts, flue gas desulfurization gypsum slag and cyanide tailings, and / or sulfuric acid slag. This method utilizes plasma melting technology to synergistically process multiple complex secondary resources, achieving efficient enrichment of precious metals and high-value conversion of all material components.

The present invention addresses the problem of providing a solid-liquid extraction agent for efficiently extracting PGMs directly from a solid article or a solid composition containing PGMs, such as an automotive catalyst, without using a high-concentration inorganic acid, and an extraction method using the extraction agent. The present invention relates to: a solid-liquid extraction agent for a platinum group metal containing (a) a hydrophobic deep eutectic solvent; and a solid-liquid extraction method for a platinum group metal using the extraction agent.

This utility model discloses a flow-diversion and temperature control device for an automotive catalyst oxygen storage capacity evaluation bench system, belonging to the field of automotive catalyst oxygen storage capacity evaluation bench systems. The device includes an execution unit and a control unit. The execution unit is connected to the engine exhaust manifold outlet and includes a flow-diversion mechanism and a temperature control mechanism. When the engine is running, the flow-diversion mechanism diverts the engine exhaust gas source to control the exhaust gas flow rate entering the catalyst body. The temperature control mechanism is located at the inlet of the flow-diversion mechanism and is used to control the temperature of the engine exhaust gas source. The control unit controls the execution unit. This device solves the problem that conventional engine bench systems with single-pipe structures cannot adjust the exhaust flow rate during automotive catalyst oxygen storage capacity evaluation testing, and the problem of catalyst inlet temperature fluctuations caused by long stabilization times before and after rich / lean switching of the excess air coefficient, ensuring the accuracy of oxygen storage capacity testing.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

The disclosure relates to an automotive catalyst system which can be used to selectively reduce carbon monoxide. The system comprises a first close coupled three-way conversion catalytic article in fluid communication with an engine exhaust outlet, a catalytic article located downstream of and in fluid communication with the first close coupled three-way conversion catalytic article, a tail-pipe catalytic article arranged downstream in fluid communication and 1.0 to 10 feet away from the catalytic article at a position chosen from before or behind a resonator, before or after a muffler, between the resonator and the muffler, inside the muffler, inside the resonator, and at a tail pipe end.

The invention provides a method for strengthening precious metal recovery and all-component utilization through cooperation of plasma and smelting, and relates to the field of solid waste recovery. Performing first mixing on the solid waste and a reducing agent to obtain a first mixture; under the working atmosphere, the first mixture is subjected to plasma smelting, and high-temperature liquid-state slag, a liquid-state sulfonium phase and a liquid-state alloy phase are obtained; the liquid sulfonium phase and the liquid alloy phase are subjected to hydrometallurgy to recover precious metal; carrying out water quenching on the high-temperature liquid slag to obtain a glass material; grinding and drying the glass material to obtain a treated glass material; carrying out second mixing on the treated glass material and a binder solution to obtain a second mixture; carrying out mould pressing and heat treatment on the second mixture to obtain glass ceramics; the solid waste comprises a waste automobile catalyst, flue gas desulfurization gypsum slag and cyanidation tailings and / or pyrite cinder. According to the method, various complex secondary resources are cooperatively processed through the plasma smelting technology, and efficient enrichment of precious metal and high-value conversion of all material components are achieved.

An intermixer or mixing device with frame structure and suspended bluff body array for use in a stationary (e.g., non-auto) SCR catalyst environment to reduce RMS levels of a mix of NOx pollutant and reduction reagent. SCR reactor apparatus with SCR catalyst module block supported on the intermixer. The SCR reactor apparatus works in an SCR reactor assembly having the SCR reactor apparatus at a first SCR1 layer plus a downstream SCR2 layer. The reduced RMS level of the mix coming from the SCR1 layer is readily able to be treated by the SCR2 layer. An SCR system features the SCR reactor assembly and a combustion source such as a coal-fired plant. Methods of assembly and operating each of the mixing device, SCR reactor apparatus, assembly and system are also featured.

The present invention discloses a method for diagnosing and analyzing the cause of failure of an automotive catalyst, belonging to the technical field of automotive exhaust catalysts. The method comprises the following steps: fault confirmation and judgment; assembly airtightness testing; carrier oxygen storage capacity testing under vehicle-wide operating conditions; carrier oxygen storage capacity testing under engine bench operating conditions; and carrier failure analysis testing, including carrier bonding strength testing, carrier specific surface area testing, and carrier element analysis. The method refines catalyst fault diagnosis and analysis from the aspects of fault diagnosis, oxygen storage testing, and carrier analysis. It determines catalyst failure based on fault codes and oxygen storage test results, and accurately determines the cause of failure through multiple experimental tests and analyses of the carrier. This method achieves precise filtering of false alarms, saves the cost of replacing parts, and significantly shortens the time it takes to find the cause of failure. Furthermore, the responsibilities of the vehicle manufacturer, parts manufacturer, and user can be clarified based on the cause of failure.

The invention provides a method for synergistically recovering rare and noble metals in a waste lithium battery and a waste automobile catalyst, which comprises the following steps: mixing black powder of the waste lithium battery, sublimed sulfur and a carbon source, and then adding desulfurized gypsum or calcium sulfate to obtain a mixed material; placing the mixed material in an inert atmosphere or under a vacuum condition, and performing sulfuration reduction roasting to obtain a roasted product; the roasted product is added into water to be subjected to water leaching treatment, suction filtration separation is conducted after stirring leaching, and a lithium sulfate solution and water leaching residues are obtained; and drying the water leaching residues, uniformly mixing the dried water leaching residues with a waste automobile catalyst and a slagging compensation agent, and carrying out matte smelting in a high-temperature smelting container to obtain nickel-cobalt matte enriched with platinum group metals (PGMs) and smelting slag. The lithium recovery rate can reach 99% or above, the nickel recovery rate exceeds 99%, the cobalt recovery rate exceeds 98%, and the recovery rate of platinum group metals (PGMs) is 90% or above.

The invention discloses a gradient-doped superlattice structure platinum-cobalt alloy / nitrogen-doped carbon nanotube composite positive electrode material and a preparation method thereof, and belongs to the field of hydrogen fuel cell catalytic materials. The catalyst is prepared by taking an AB2 type superlattice PtCoFeCr alloy as an active core (Co: Fe: Cr = 3: 1: 0.2), forming a periodic strain field through [111] crystal face orientation regulation and control, combining a nitrogen-doped carbon nanotube (N content is 8.5 at%) carrier and adopting a pulsed laser deposition-microwave annealing combined technology and a supercritical CO2 fluid loading process. The ORR mass activity reaches 6.2 A / mgPt at 0.9 V and is improved by 17 times compared with that of commercial Pt / C, and the activity is attenuated by lt after 30,000 times of circulation; the single-stack platinum dosage is 7.2 mg / kW, the large-scale cost is 380 yuan / g, the cost bottleneck of a hydrogen energy automobile catalyst can be broken through, and the method is suitable for the field of new energy automobiles.

The invention belongs to the technical field of precious metal recovery, and particularly relates to a method for recovering platinum group metal through one-step smelting of a waste automobile catalyst and iron tailings for electric furnace steelmaking. The method comprises the following steps: (1) uniformly mixing the waste automobile catalyst, the iron tailings for electric furnace steelmaking, a carbon reducing agent and a slag former in proportion, putting the mixture into an alumina crucible, and directly putting the alumina crucible into a high-temperature furnace, wherein the mass ratio of the waste automobile catalyst to the iron tailings for electric furnace steelmaking is (30-55): (45-70); and (2) volatile moisture removal, in-situ reduction of iron oxide and slag-metal separation operation are continuously completed in the same furnace body through pre-roasting at the temperature of 800-950 DEG C in the first section and smelting at the temperature of 1450-1550 DEG C in the second section. According to the method, the platinum group metal is efficiently recycled through the carbon thermal reduction and melting coupling technology, meanwhile, two kinds of dangerous solid waste are cooperatively treated, the using amount of an additional slag former and an iron trapping agent is remarkably reduced, and the method has the advantages of being simple in process, high in recycling rate, excellent in economical efficiency and the like.

An intermixer or mixing device with frame structure and suspended bluff body array for use in a stationary (e.g., non-auto) SCR catalyst environment to reduce RMS levels of a mix of NOX pollutant and reduction reagent. SCR reactor apparatus with SCR catalyst module block supported on the intermixer. The SCR reactor apparatus works in an SCR reactor assembly having the SCR reactor apparatus at a first SCR1 layer plus a downstream SCR2 layer. The reduced RMS level of the mix coming from the SCR1 layer is readily able to be treated by the SCR2 layer. An SCR system features the SCR reactor assembly and a combustion source such as a coal-fired plant. Methods of assembly and operating each of the mixing device, SCR reactor apparatus, assembly and system are also featured.

The utility model relates to a kind of anti-seepage automobile catalyst slurry coating devices, which is composed of fixed parts, slurry containing parts, anti-seepage sealing parts and anti-seepage sealing fixed parts from top to bottom.The device fixed part is a square plate with a central circular hole.The slurry containing part is a cuboid, with two faces of length and width as the center, and a downward inner conical hole is opened through the center.The anti-seepage sealing part is a square flexible waterproof rubber with a certain thickness, with an inner circular hole opened through the center with a certain radius.The center line of the inner circular hole coincides with the center line of the inner conical hole of the slurry containing part, and anti-seepage sealing part fixing bolts are passed through the holes around the square edges.The utility model has the advantages of simple structure, convenient storage, quick maintenance and low cost, and is an ideal anti-seepage automobile catalyst slurry coating device for silicon carbide / mullite honeycomb carrier.