327results about How to "Reduce catalysis" patented technology

A continuous process for upgrading sour crude oil by treating the sour crude oil in a two step process that includes a hydro-demetallization section and a hydro-desulfurization section, both of which are constructed in a permutable fashion so as to optimize the operating conditions and catalyst lifespan to produce a high value crude oil having low sulfur and low organometallic impurities.

The invention provides a multiphase wet oxidation catalyst, in which noble metal elements, which are selected from one or more than one of the group consisting of platinum, ruthenium, rhodium, iridium and aurum, are taken as active components; and rare earth elements, which are selected from one or more than one of the group consisting of lanthanum, cerium, praseodymium and neodymium, are taken as auxiliary components; the active components and the auxiliary components are carried on a ceramic-activated carbon carrier, wherein the content of activated carbon accounts for 1 to 15% of the totalweight of the ceramic-activated carbon carrier, and the weight of elements in the active components and the auxiliary components accounts for 0.25 to 5% of the weight of the activated carbon respectively. The invention further provides a preparation method and uses thereof. The catalyst of the invention is particularly suitable for the treatment of high-concentration organic waste water which is hardly degraded.

The invention relates to a honeycomb metal network carrier catalyst for catalyzing and reducing nitrogen oxide, and relative preparation, used in vehicle tail gas purification technique. The invention comprises metal carrier and catalyst, characterized in that the catalyst is load-type catalyst, the catalyst carrier is honeycomb metal network carrier carrying gamma-Al2O3 coat, referring coat mass, the content of TiO2 is 14.0-20.0wt% and the content of CeZrO is 3.0-6.0wt%, and referring to catalyst mass, the content of active component palladium is 0.1-1.0wt%, and the preparation comprises that preparing TiO2 gel, preparing TiO2 coat at the face of carrier, loading cerium zirconium oxide on carrier, leading in catalyst active component palladium. The invention has the advantages that the invention can improve mass transfer and heat transfer in catalyst, the catalyst has higher catalysis activity in low-temperature oxygen-abundant condition, wide active temperature window, simple preparation and low cost.

A thermal protection system suitable as a heat shield for a space vehicle includes a flexible insulation mat that is adhesively bonded onto the outer skin of the space vehicle, a cover layer made of at least one ply of a ceramic fiber composite material secured onto the insulation mat, and a coating of an inorganic material applied onto an outer surface of the ceramic cover layer. The cover layer is secured to the insulation mat by adhesive bonding, stitching with ceramic threads or the like, or by a snap fastener button connection. The ceramic fiber composite materials of the cover layer include inorganic fibers which are preferably oxides, carbides or mixtures thereof embedded in a matrix of the same compositional components, whereby the components can be selected appropriately depending on the requirements of the particular application. The overall thermal protection system remains flexible, lightweight, and highly effective for thermal shielding, so that it may be used not only on the relatively cooler portions of the space vehicle, but also on the most highly thermally loaded areas such as the nose and the leading edges of wings and the like.

The invention belongs to the technical field of lithium ion battery preparation, and specifically relates to nickelic ternary anode material power lithium ion battery electrolyte and a preparation method thereof. The electrolyte consists of electrolyte lithium salt, a non-aqueous organic solvent and functional additives, wherein the functional additives comprise an alkyl nitrile additive, fluorinated chain carboxylate, a lithium salt additive and a cathode film forming additive; and the content of the functional additives is 0.5-10% of the weight of the electrolyte. The electrolyte provided bythe invention interacts with transition metal in a nickelic ternary anode material through the functional additives and is decomposed on the surfaces of the anode and cathode to form stable interfacefilms, so as to inhibit the metal ionic catalysis activity and decrease battery side reactions, so that the electrolyte has favorable anti-oxidant and film forming characteristics, is capable of effectively improving the high-temperature storage performance, safety performance and cycle life of nickelic ternary anode material power lithium ion batteries, effectively inhibiting the generation of battery expansion and ensuring the high power characteristic of the batteries at the same time.

The invention provides a discharge gas treatment catalyst which can effectively decreases NO_x and SO₃ contained in a discharge gas. The discharge gas treatment catalyst, for removing nitrogen oxide and sulfur trioxide from a discharge gas, includes a carrier which is formed of titania-tungsten oxide and which carries ruthenium, and a titania-tungsten oxide-based NO_x removal catalyst serving as a substrate which is coated with the carrier. When a discharge gas to which ammonia has been added and which contains SO₃ and NO_x is brought into contact with the catalyst, decomposition of ammonia is suppressed by ruthenium, and reduction of SO₃ and NO_x contained in the discharge gas is promoted, whereby SO₃ concentration and NO_x concentration can be further decreased.

The invention discloses preparation of a novel heterogenous catalyst Co (II) (at) TF-TA COF: covalent organic frameworks (COFs)-supported metallic cobalt is used for catalyzing carbon dioxide and an epoxy compound for synthesis of a cyclic carbonate compound. Structural unit of the material contains a cobalt-porphyrin compound which can be used for catalyzing a reaction between carbon dioxide and an epoxy compound. In addition, the COFs have large specific surface area and an open porous structure, which can enhance adsorption capacity of carbon dioxide. Thus, the Co (II) (at) TF-TA COF can simultaneously realize adsorption of carbon dioxide gas and catalytic conversion for generation of cyclic carbonates. The type of a reaction substrate is extensible; reaction yield is high; the catalyst can be recycled; operation is simple; and added value of a product is high.

A method of producing catalyst powder of the present invention has a step of precipitating any one of a noble metal particle (5) and a transition metal particle (10) in a reversed micelle (1); a step of precipitating, in the reversed micelle (1) in which any one of the noble metal particle (5) and the transition metal particle (10) is precipitated, a porous support material (7) which supports the noble metal particle (5) and the transition metal particle (10); and a step of precipitating the other of the noble metal particle (5) and the transition metal particle (10) in the reversed micelle (1) in which any one of the noble metal particle (5) and the transition metal particle (10) is precipitated. By this method, it is possible to obtain catalyst powder capable of maintaining initial purification performance thereof even if being exposed to the high temperature.

The invention relates to a copper toxicity-resistant glass fiber reinforced polypropylene composite material and a preparation method thereof, and the copper toxicity-resistant glass fiber reinforced polypropylene composite material consists of the following raw materials by weight percent: 60-65% of polypropylene, 2-7% of compatilizer, 0.7-2% of composite antioxidant, 0-0.02% of anti-copper toxicity agent, 0.1-0.8% of processing additives and 30-35% of glass fibers. The preparation method comprises the following steps: firstly mixing the polypropylene, the compatilizer, the composite antioxidant, the anti-copper toxicity agent and the processing additives in a high mixing machine, feeding into a twin-screw extruder via a precision meter, further adding the short glass fibers into the extruder via the meter after the materials in the extruder are softened, then melting, extruding and granulating, wherein the extrusion temperature is 200-220 DEG C. The bonding force between the polypropylene and a glass fiber interface is strong, and the product has the advantages of excellent mechanical performances, no obvious surface fiber revealed phenomenon, excellent heat aging resistance and excellent anti-copper toxicity performance; furthermore, the product almost has no loss of the mechanical performances when baking in a baking oven at 150 DEG C for 1000h.

The invention relates to a high speed steel tool heat treatment method and the method specifically includes the following steps: high-temperature step quenching steel materials to be treated in a quenching medium at the temperature of 1200-1310 DEG C; after quenching, cooling to room temperature and then low-temperature tempering for 1h at the temperature of 80-100 DEG C; cold treating for 2-3h at the temperature of minus 120-minus 80 DEG C; and finally tempering for 1-1.5h at the temperature of 540-560 DEG C, wherein the quenching medium is selected from calcium chloride saturated water solution, polyglycol water solution, polyving akohol water solution or potassium permanganate quenching liquid. The high speed steel tool heat treatment method is simple in process and saves energy, and compared with traditional technology, the mechanical performance and service life of the high speed steel tool are improved by around 20-40 percent.

The invention provides a vehicle engine oil additive and engine oil. The additive comprises the following components: 15 to 34 weight percent of nano WS2 powder, 0 to 24 weight percent of nano MoS2 powder, 20 to 20.5 weight percent of dispersant, 0 to 0.5 weight percent of antioxidant, 0 to 1 weight percent of metal passivant and the balance of base oil, wherein the kinematic viscosity of the base oil at 40 DEG C is 70 to 190mm2/s, and the kinematic viscosity of the base oil at 100 DEG C is 12 to 20mm2/s. The engine oil of the invention comprises 5 to 20 weight percent of additive and 80 to 95 weight percent of petrolic oil or comprises 15 to 25 weight percent of additive and 75 to 85 weight percent of diesel engine oil. The engine oil can improve the service life of engine, reduce oil consumption and has obvious energy-saving and emission-reducing effects and other effects.

This invention provides a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with an aqueous alkaline solution to remove the substances deposited thereon, and subjecting the catalyst to an activation treatment with an aqueous acid solution; a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with a cleaning fluid comprising an aqueous solution containing sulfuric acid or ammonia at a concentration of 0.05 to 20% by weight and maintained at a temperature of 10 to 90°C.; and a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power under the above-described conditions, and impregnating the denitration catalyst with a catalytically active component so as to support it on the catalyst.

The invention discloses a positive electrode material used for lithium ion batteries. The positive electrode material comprises a main body material and an interface modification object on the surfaceof the main body material, wherein the main body material is a lithium-containing transition metal oxide LixMyN(1-y)O(2-alpha)A(beta); the interface modification object on the surface of the main body material is alkaline earth metal silicate DaR<b+>2(1-a)/bO.zSicT(1-c)O(2-lambda)E(zeta), wherein x is greater than or equal to 0.8 and smaller than or equal to 1.3, y is greater than or equal to 0.6and smaller than or equal to 1.0, alpha is greater than or equal to 0 and smaller than or equal to 0.2, beta is greater than or equal to 0 and smaller than or equal to 0.4, a is greater than or equalto 0.3 and smaller than or equal to 1.0, c is greater than or equal to 0.3 and smaller than or equal to 1.0, z is greater than or equal to 0.1 and smaller than or equal to 20, lambda is greater thanor equal to 0 and smaller than or equal to 0.5, zeta is greater than or equal to 0 and smaller than or equal to 0.5, and the numerical value of b is determined by the element variety and occupied position of R. The invention further discloses a preparation method of the positive electrode material used for lithium ion batteries. The positive electrode material used for lithium ion batteries disclosed by the invention solves the problems such as low high voltage tolerance, low cycle stability and low safety performance existing in an existing lithium ion battery.

The invention relates to systems and methods for treating oxygen-rich NO_x-containing exhaust. The systems and methods comprise using first and second NO_x reducing catalysts. According to one aspect of the invention, the first catalyst reduces NO_x in oxygen-rich exhaust primarily through reaction with a first reductant species and the second catalyst reduces NO_x in oxygen-rich exhaust primarily through reaction with a second reductant species. Collectively, the two catalysts are substantially more effective than either of the catalysts individually in reducing the concentration of NO_x in the exhaust. According to another aspect of the invention, an exhaust system is configured to inject a first reductant species primarily at a first location upstream of the first NO_x reducing catalyst, and is configured to inject a second reductant species primarily at a second location downstream of the first NO_x reducing catalyst, but upstream of the second NO_x reducing catalyst.

The invention discloses a low-energy-consumption high-yield method for preparing hydrogen from raw gas. The method comprises the following procedures: pre-cleaning; naphthalene removal; transformationand desulfurization; sulfur recovery; refined debenzolization; pressure swing adsorption for hydrogen production; recovery of tail gas; nitrogen production; etc. After pretreatment and naphthalene removal, raw gas is allowed to enter the procedure of transformation and desulfurization so as to obtain more hydrogen and increase the yield of hydrogen, and then desulfurization is carried out in a desulfurization tower; then pure hydrogen is prepared through the procedure of refined debenzolization and the procedure of pressure swing adsorption for hydrogen production; through the procedures of tail gas recovery and nitrogen production, effective hydrogen in desorbed gas is recovered, and hydrogen yield is further increased; and pure nitrogen with a purity of 99% or more is further prepared through a nitrogen production unit. The method provided by the invention substantially reduces the energy consumption of an apparatus for hydrogen production from raw gas, increases hydrogen yield, recovers almost all the effective hydrogen component in the desorbed gas, realizes recovery and graded utilization of each component in the raw gas while guaranteeing low energy consumption and high yield, and by-produces sulfur, pure nitrogen and the other products while preparing pure hydrogen.

The invention discloses a water ozonization treatment method by taking a cerium oxide nanomaterial as a catalyst. According to the method, different cerium oxide nanomaterials are prepared by adjusting and controlling the synthesis reaction conditions, and are taken as catalysts for adding into a water ozonization treatment system of phenol containing waste water, so that the degradation of phenol organic pollutants is facilitated. On the basis, a novel water ozonization treatment method is provided. The method belongs to the technical fields of water treatment and environmental catalysis. The prepared cerium oxide nanomaterial has the characteristics of small size, high dispersity in a water solution system, easiness for separation and recovery and the like, and has a wide application prospect in the application of water ozonization treatment.

A process for adiabatically prereforming a feedstock, includes: providing an adiabatic reactor; providing a catalyst containing 1-20 wt. % nickel and 0.4-5 wt. % potassium, wherein the catalyst has an overall catalyst porosity of 25-50% with 20-80% of the overall catalyst porosity contributed by pores having pore diameters of at least 500 Å; providing the feedstock containing natural gas and steam, wherein the natural gas contains an initial concentration of higher hydrocarbons, and a ratio of steam to natural gas in the feedstock is from 1.5:1 to 5:1; preheating the feedstock to a temperature of 300-700° C. to provide a heated feedstock; providing the heated feedstock to the reactor; and producing a product containing hydrogen, carbon monoxide, carbon dioxide, unreacted methane, and steam, wherein said product contains a reduced concentration of higher hydrocarbons less than the initial concentration of higher hydrocarbons, to prereform the feedstock.

The invention discloses an oxygen reduction electrocatalyst and a preparation method thereof, which is a load type catalyst and consists of a transition metal triethylene tetramine chelate complex and a carbon black carrier; wherein, the transition metal triethylene tetramine chelate complex is obtained by the reaction of transition metal-salt and triethylene tetramine. The oxygen reduction electrocatalyst of the invention uses the triethylene tetramine having simple structure and low cost, which overcomes the defects of traditionally used macrocyclic compound porphyrin and Phthalocyanine and derivatives thereof and has simple preparation technique, low cost, friendly environment and a better catalytic activity; a oxygen reduction peak potential is 0.6745 (vs. NHE) and a oxygen reduction peak current is 1.493mA/m<2>; stability is relatively high, and oxygen reduction catalytic performance is not obviously reduced after recycling for 24 hours. The oxygen reduction electrocatalyst of the invention can be applied to the fields of proton exchange membrane fuel batteries, direct alcohol fuel cells, and cathode materials of metal-air battery, etc.

A deep compaction gas-pool pressure-crack liquid is composed : thickener 0.2-1.0%, surfactant 0.05-0.2%, clay stabilizer 0.1-1%, germicide0.01-0.2%, buffering agent 0.05-0.2%, the temperature stabilizer 0.1-0.5%, the high temperature cross linker 0.1-0.5%, the cross linking control agent 0.1-0.5%, the broker gum agent 0.001-0.01%, the broken gum catalyst 0.0001-0.001%, the antifoam agent 0.01-0.1%, the falling filter-lossing agent 1-5%, water: the rest. The liquid is of thermal resistance and shearing performance and It can decrease the nowel of the pressure-crack liquid and the filting loss, also it can improve efficiency.

The invention relates to a testing reagent for activated partial thromboplastin time. The testing reagent is prepared from phospholipids, activator and stabilizer. The stabilizer is prepared from, by mass, 1%-4% of alanine and 0.5-5 mM of catechin. A preparation method of the testing reagent includes the steps that an HEPES buffer solution is prepared, the pH value of the buffer solution is adjusted to be neutral, and sodium chloride is added; the activator is added to the buffer solution, phospholipids and other components are added after stirring and even mixing are conducted, and then the testing reagent for APTT is obtained after even mixing, stirring and filtering are conducted. According to the testing reagent for activated partial thromboplastin time, stabilizer components with high toxicity are removed, so that production and use processes are safer; meanwhile, the stability and detection accuracy of the testing reagent for APTT are greatly improved.