83results about How to "Less carbon deposit" patented technology

A hdyrocatalyst for removing metals from residual oil is composed of a macroreticular aluminium carrier and the Mo and / or W and Co and / or Ni, which are carried by said carrier. It features that said carrier contains aluminium oxide (95-99 wt%) and halogen (1-5) and has lower acidity, resulting in high demetallizing activity and low carbon deposit.

A hdyrocatalyst for removing metals from residual oil is composed of a macroreticular aluminium carrier and the Mo and / or W and Co and / or Ni, which are carried by said carrier. It features that said carrier contains aluminium oxide (95-99 wt%) and halogen (1-5) and has lower acidity, resulting in high demetallizing activity and low carbon deposit.

The invention discloses a catalyst for converting alcohols and ethers into aromatic hydrocarbons, as well as a preparation method and a use method of the catalyst, and belongs to the technical field of chemical engineering. The preparation method comprises the steps as follows: at first, taking a template agent, kaolin, sodium hydroxide and water as raw materials for preparing a hydrogen type nanoscale ZSM-5 molecular sieve, and then directly preparing the catalyst; or based on the hydrogen type nanoscale ZSM-5 molecular sieve, preparing the two-component, three-component or four-component catalyst with metal and / or a structure enhancer and / or a stabilizing additive. The catalyst comprises the following components in percentage by mass: 30-100% of the needle-like nanoscale ZSM-5 molecular sieve, 0-10% of the metal, 0-50% of the structure enhancer and 0-10% of the stabilizing additive. The invention further provides a method for enabling the catalyst to be used for converting alcohols and ethers into aromatic hydrocarbons. The catalyst is small in particle size, high in catalytic efficiency and low in use cost; the preparation method is simple and efficient; and the use method is reasonable and efficient.

The invention relates to a catalyst composition for synthesis of methyl acrylate and co-production of methyl methacrylate by methyl acetate and formaldehyde, a preparation method of the catalyst composition and a method for production of methyl acrylate and co-production of methyl methacrylate by using the catalyst composition. The catalyst composition disclosed by the invention takes SiO2 as a catalyst carrier, and also comprises metal salts of Cs and Zr, and an oxide of Sb.

The invention provides a catalyst for the selective hydrogenation of an oxygen-containing olefin material, which comprises a porous inorganic carrier, main active components and auxiliary active components, wherein the main active components and the auxiliary active components are loaded on the porous inorganic carrier. The catalyst is characterized in that: the main active components are Pd, Au and Ag; the auxiliary active components may be at least one of Bi, Zr, Ce, Zn, Ni, Cu, K, Mg, Ba, Ca, Sn, Pb, Mn, La, Ti, Sr and Na. Because of the synergistic effect of a plurality of components, the activity and selectivity of the catalyst are both improved obviously; the catalyst has high oxygen poisoning resistant performance and high carbon oxide fluctuation resistant performance, and has functions of selective hydrogenation and selective carbon monoxide oxidation. The catalyst also has the characteristics of long regeneration period, long use period and the like.

The invention discloses a perovskite catalyst used for the steam reforming of oxygenated ethanol and a preparation method thereof. The structural formula of the perovskite catalyst is La1-xCaxFe0.7Ni0.3O3 and x is 0-0.5. The preparation method comprises the following steps: using deionized water to prepare a solution containing metallic positive ions of La, Ca, Fe and Ni, citric acid and polyethylene glycol 400, stirring the solution at 70-95 DEG C to obtain sol; drying sol, performing first stage roasting and second stage roasting to obtain solid perovskite; and grinding and screening solid perovskite to obtain the perovskite catalyst La1-xCaxFe0.7Ni0.3O3. The invention has the advantages that the preparation method is convenient, the catalyst is used in the steam reforming of oxygenated ethanol, the catalyst activity is high, the carbon deposit amount is low, the anti-sintering performance is good, and the perovskite catalyst is a catalyst which has high activity and stability and is used for preparing hydrogen from ethanol.

The present invention relates to a catalyst used for manufacturing olefin by catalytic pyrolysis which mainly solves the problems of high reaction temperature and low ethylene and propylene yield of the existing catalyst to manufacture ethylene and propylene by catalytic pyrolysis. The present invention better solves the problems by adopting the technical proposal of loading at least two elements selected from rare earth elements, the elements of the VA group, the IIIA group, the IB group or the IIB group in the periodic table of elements on the symbiosis molecular sieves of ZSM-5 / mordenite, ZSM-5 / Beta zeolites or ZSM-5 / Y zeolites to compose the catalyst. The present invention can be used for the industrial production of ethylene and propylene by naphtha catalytic pyrolysis.

The invention discloses a system for deep treatment of coking wastewater by means of catalytic ozonation-ceramic membrane filtration, mainly consisting of an ozone generator, an ozone oxidation reactor, a booster pump, a ceramic membrane component, a gas-liquid separator, a tail gas absorbing device, a wastewater reflowing pump, a catalyst reflowing pump, a catalyst adding pump, a catalyst outflowing groove, a catalyst adding groove and corresponding pipe fittings, valves and instruments. According to the system, the application of a powder catalyst in a dynamic reactor can be realized due tothe combination of the catalytic ozonation and the ceramic membrane separation; the ozonation and the catalytic ozonation can be guaranteed to be carried out in a single reactor in a segmental way due to the convection current of the reflowing wastewater and the catalyst slurry and the impact of upcurrent; the mass transfer resistance when the ozonation and the catalytic ozonation are independently used can be reduced; the use ratio of hydroxyl free radical and the removal rate of organic matters can be improved; the aims, such as the COD (chemical oxygen demand), the chroma and the turbidityof the deeply-treated coking wastewater, can be achieved; and the problems that the activity is suddenly reduced when the powder catalyst is formed into particulates, the running needs to be suspended when the mass transfer resistance is increased due to the use of the particulate catalyst and the particulate catalyst is changed and the like can be solved.

An expansion cycle liquid oxygen and methane upper-stage engine system comprises a propellant supply system, an ignition system and a thrust chamber. The propellant supply system comprises a methane supply system and a liquid oxygen supply system, the methane supply system pressurizes low-temperature liquid methane from an external storage tank and then supplies the low-temperature liquid methaneto the thrust chamber; the liquid oxygen supply system pressurizes the low-temperature liquid oxygen from the external storage tank and then supplies the low-temperature liquid oxygen to the thrust chamber; and the ignition system is located at the head of the thrust chamber and ignites under the control of a control system, liquid oxygen and methane entering the thrust chamber are ignited, and generated high-temperature gas is sprayed out of the nozzle of the thrust chamber to generate thrust force. The liquid oxygen and liquid methane are used as a propellant combination, and a closed expansion circulation system scheme is adopted, so the system is simple, the inherent reliability is high, the specific impulse performance is high, and repeated starting is easy to achieve.

The invention provides a naphtha reforming catalyst. The naphtha reforming catalyst comprises a TiO2-Al2O3 compound carrier and the following active component based on the mass of the carrier: 0.01 to 2.0 percent of platinum metals, 0.05 to 2.0 percent of VIIB metals, and 0.1 to 5.0 percent of halogens; the titanium oxide content of the TiO2-Al2O3 compound carrier is 3 to 50 percent; and the TiO2 is highly dispersed in the Al2O3. The catalyst carrier is prepared by a co-precipitation method, and a dispersing agent is added in a preparation process, so that the TiO2 is highly dispersed in the Al2O3, and the catalyst improves arene yield and increases activity stability.

The invention discloses a method for cooling high temperature parts through catalytic reforming of a liquid hydrocarbon fuel, and in particular relates to a process method for cooling high temperature parts. The liquid hydrocarbon fuel and water are blended and preheated to be vaporized into mixed vapor of hydrocarbon fuel vapor and water vapor, the mixed vapor enters a catalytic reforming reaction cooling section on the surface of a high temperature part, a reforming endothermic reaction is generated on the surface of a catalyst, and the surface temperature of the high temperature part is reduced; meanwhile, combustible gas rich in hydrogen is generated and is sprayed through a fuel nozzle or a convergent nozzle to form a combustible gaseous mixed fuel required by combustion. By the method, the cooling amount is great, the surface temperature of the high temperature part is effectively reduced, the coking of a cooling channel is relieved, and an effect of cooling the high temperaturepart and the characteristics of the fuel are improved.

The invention discloses a preparation method and use of a difunctional low-carbon alkane dehydrogenation catalyst. The difunctional low-carbon alkane dehydrogenation catalyst is prepared by a dipping method, utilizes gamma-Al2O3 as a carrier, Pt as an active component, and Sn, Na, La and Zn as auxiliary agents, and optionally contains Cl as a modifier. Under the low-carbon alkane dehydrogenation conditions, hydrogen-vapor-low carbon alkane mixed gas and an oxygen-containing compound are simultaneously injected into a reactor, and the catalyst in the reactor has dual functions of low-carbon alkane dehydrogenation and hydrogen selective combustion. Through selective combustion of hydrogen, dehydrogenation reaction equilibrium is shifted toward right and simultaneously, the released combustion heat can be supplied for a dehydrogenation reaction. Through use of the difunctional low-carbon alkane dehydrogenation catalyst, a dehydrogenation reaction conversion rate and selectivity are high and stability is good.

The invention discloses a catalyst for preparing hydrogen by reforming the by-product glycerine vapour of biological diesel oil and a preparation method thereof. The ingredients of the catalyst include 30-70 weight percent of bentonite, 5-20 weight percent of NiO and 5-15 weight percent of CuO. The catalyst prepared by such method has the advantages of that the reaction activity of preparation of hydrogen by glycerine vapour reforming is relatively high, the activity grows following the increase of temperature, the yield of hydrogen and carbon dioxide is increased and the quantity of carbon accumulation is lowered. The raw materials are mainly minerals and compounds which are cheap and abundant; the preparation process is simple, and the cost is low. In addition, the long-term storage or direct abandonment of the catalyst does not incur secondary pollution, therefore, the catalyst is environment-friendly.

The invention provides a hollow lost foam casting mold. A hollow structure which is in a specific shape and layout is arranged inside the mold, so that the application amount of a foam material is reduced, and the breathability is improved; on the premise of not influencing the use of an obtained casting, the surface recarburization of the obtained casting is significantly reduced, the mechanicalperformance and surface performance of the casting are improved, and the yield of the casting is improved. The embodiment result shows that compared with a solid lost foam casting mold, the heart recarburization amount and the surface layer recarburization amount of the casting manufactured with the hollow lost foam casting mold are significantly lowered. The invention further provides a manufacturing method of the hollow lost foam casting mold. The manufacturing method is easy and convenient to perform and easy to implement.

The invention discloses a preparation method and an application of a fluidized catalytic cracking catalyst aid. The method comprises the following steps of: performing ammonium ion exchange on kaolin microspheres serving as a substrate; treating the kaolin microspheres by using alkaline matters; and finally adding alkaline earth metal oxides such as magnesium, calcium and the like and roasting, thereby obtaining the fluidized catalytic cracking catalyst aid. The synthesized catalyst aid can be used for lowering the carbon deposition quantity and improving the diesel oil production rate during the fluidized catalytic cracking. By utilizing the obtained catalyst aid, the great modification to the existing device is not required; and the low cost is achieved. Most importantly, the obtained catalyst aid can well adapt to heavy oil and can be used for obviously lowering the coke quantity and the diesel fuel increase rate thereof.

A catalyst for producing a gasoline component by aromatization of naphtha and methanol includes a carrier and active components having contents calculated based on the carrier as follows: 0.1-5.0% bymass of Ag, 1.0-15.0% by mass of a VA group element oxide, 0.1-3.0% by mass of a rare earth element oxide; and the carrier includes 40-80% by mass of ZSM-5 zeolite, 3-30% by mass of aluminum oxide, and 5-30% by mass of amorphous aluminum silicate. The catalyst can promote the naphtha and the methanol to produce a co-aromatization reaction to form the gasoline component with a high-octane value, and can produce a high-quality liquefied gas by side.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene through isobutane dehydrogenation. The preparation method of the isobutane dehydrogenation catalyst comprises the following steps: (a) subjecting a template agent, a nonionic surfactant, an acid agent and industrial sodium silicateto be mixed and in contact under a solution condition to obtain a solution A; (b) crystallizing the solution A, and then sequentially conducting washing and drying to obtain mesoporous material raw powder; (c) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a spherical mesoporous molecular sieve material carrier; and (d) carrying out thermal activationtreatment on the spherical mesoporous molecular sieve material carrier obtained in the step (c), then carrying out dipping treatment in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. According to the method, the isobutane dehydrogenation catalyst with high catalytic activity can be synthesized by using a low-cost silicon source.

The invention discloses a titanium heating wire with a low surface energy layer. The titanium heating wire comprises an anodic oxidation layer on the surface of a titanium wire and a sol-gel layer onthe surface of the anodic oxidation layer. The invention further discloses a preparation method of the titanium heating wire and an application of the titanium heating wire to reduction of tobacco taradhesion of an electronic cigarette.

The invention discloses a moving bed C3 / C4 alkane dehydrogenation process. A catalyst has a flowing direction (among reactors)opposite to that of a reactant flow. The method comprises the following steps: feeding a mixed hydrogen and C3 / C4 alkane fed material flow through a heat integration heat exchanger and a heating furnace, feeding the flow into a first-stage reactor, and feeding the flow through a second-stage reactor and a final-stage reactor in series in sequence to form a reaction material flow; and regenerating the catalyst by using a regenerator, feeding the catalyst into the final-stage reactor, and feeding the catalyst through the second-stage reactor and the final-stage reactor in series in sequence to form a catalyst flow, wherein a hydrogen permeable membrane separator is arranged at the outlet of each stage of the reactors. Compared with a conventional industrial propane dehydrogenation process, the process is capable of increasing the per-pass conversion rate of C3 / C4alkane, reducing reaction temperatures, improving selectivity, saving energy, reducing carbon accumulation on the catalyst, prolonging the service life of the catalyst and reducing investment of devices.

The invention relates to the field of catalysts, and discloses a method for preparing an isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and a methodfor preparing isobutene through dehydrogenation of isobutane. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) preparing a first mesoporous material filter cake with a three-dimensional cubic pore channel structure and a second mesoporous material filter cake with a two-dimensional hexagonal pore channel structure; (b) preparing a silica gel filter cake; (c) mixing the first mesoporous material filter cake, the second mesoporous material filter cake, the silica gel filter cake and chlorite, and sequentially carrying out ball milling, pulping, drying and templateagent removal to obtain a spherical double-mesoporous chlorite composite material carrier; and (d) carrying out dipping treatment on the obtained spherical double-mesoporous chlorite composite material carrier in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. The obtained isobutane dehydrogenation catalyst of the invention has good dehydrogenation activity and carbon deposition resistance.

The invention discloses a nickel modified HY molecular sieve oxygen carrier with a three-dimensional porous structure as well as preparation and application thereof. An HY molecular sieve is used as acarrier, transition metal is introduced to modify the molecular sieve, and the loading amount of the transition metal in the obtained metal modified HY oxygen carrier is 5-25%, thereby enhancing thecatalytic and oxygen-carrying capacities of the three-dimensional porous HY molecular sieve; a pyrolysis liquid phase product can be converted into hydrogen-rich synthesis gas under a certain reactioncondition; and the ratio of H2 to CO in the synthesis gas can be regulated and controlled to be about 0.5-3.0 by adjusting the reaction working condition, so that further Fischer-Tropsch synthesis isfacilitated.

The invention relates to the field of catalysts, and discloses a method for preparing an isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and a methodfor preparing isobutene through dehydrogenation of isobutane. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) preparing a mesoporous molecular sieve filter cake with one-dimensional straight-through pore channels; (b) mixing the mesoporous molecular sieve filter cake and a silica gel, mixing, carrying out first ball milling, mixing the obtained first ball-milled slurry and water, pulping, carrying out second ball milling to obtain second ball-milled slurry, carrying out spray drying on the second ball-milled slurry, screening by adopting a cyclone separation technology, and removing the template agent from the screened product to obtain a composite material; and (c) carrying out thermal activation on the composite material, carrying out dipping treatment, removing the solvent, drying, roasting, and loading a Pt component and a Zn component. According to the invention, the obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbon deposition resistance.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a supporter being a composite material containing silica gel and hexagonal mesoporous materialas well as a preparation method and application of the isobutane dehydrogenation catalyst. The method comprises the following steps: (a) preparing hexagonal mesoporous material raw powder; (b) preparing a hexagonal mesoporous material; (c) carrying out activation treatment on the hexagonal mesoporous material; and (d) carrying out activation treatment on the supporter, then carrying out impregnation treatment in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying treatment and roasting treatment. According to the method, the isobutane dehydrogenation catalyst with high catalytic activity can be synthesized by using a low-cost silicon source.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a spherical doughnut mesoporous material silica gel material as a carrier, and a preparation method and application of the catalyst. The preparation method of the isobutane dehydrogenation catalyst comprises the following steps: (a) preparing a doughnut mesoporous material filter cake; (b) preparing a silica gel filter cake; (c) mixing the doughnut mesoporous material filter cake and the silica gel filter cake and performing ball-milling, water-pulping the solid powder obtained after ball-milling and then performing spray-drying, and then removing a template agent in the obtained product to obtain the spherical doughnut mesoporous material silica gel composite material; and (d) performing impregnation treatment on the obtained spherical doughnut mesoporous material silica gel composite material in a solution containing a Pt component precursor and a Zn component precursor, and thenperforming solvent removal treatment, drying, and baking in order. The obtained isobutane dehydrogenation catalyst has relatively good dehydrogenation activity and carbon-deposition resistance.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a composite material containing a doughnut-shaped mesoporous material and silica gel as a carrier, a preparation method of the isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and application of the isobutane dehydrogenation catalyst in preparation of isobutene through isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises the following steps of (a) preparing doughnut-shaped mesoporous materialraw powder; (b) performing plate-stripping agent treatment on the doughnut-shaped mesoporous material raw powder to obtain the doughnut-shaped mesoporous material; (c) mixing the doughnut-shaped mesoporous material with the silica gel to obtain the composite material containing the doughnut-shaped mesoporous material and the silica gel; and (d) performing dipping treatment in a solution containinga PT component precursor and a Zn component precursor after thermally activating the composite material, and then sequentially performing solvent removal treatment, drying and roasting. The obtainedisobutane dehydrogenation catalyst has better dehydrogenation activity and carbon deposition resistance.

The invention relates to the field of dehydrogenation catalysts, in particular to a dehydrogenation catalyst and a preparation method thereof and an application thereof. The dehydrogenation catalyst comprises a carrier and a main active metal component loaded on the carrier, wherein the main active metal component is a noble metal, and the carrier is a magnesium-aluminum composite carrier. The preparation method of the dehydrogenation catalyst comprises the following steps: (1) under the alkaline condition, an aluminum salt solution contacts with a precipitating agent, and an aluminum hydroxide hydrogel is obtained after aging and separation; the aluminum hydroxide hydrogel is cleaned by respectively using water and an alcohol solvent; and the aluminum hydroxide alcogel contacts with an alcohol solution of a magnesium salt under the ultrasonic condition, then the solvent is removed, and drying and roasting are performed to obtain the magnesium-aluminum composite carrier; and (2) the main active metal component is loaded on the magnesium-aluminum composite carrier. The dehydrogenation catalyst can achieve relatively good dehydrogenation activity, selectivity, stability and carbon deposition resistance under the condition of a very low noble metal loading capacity.

The invention relates to a device for solid fuel chemical-looping hydrogen production and application, also relates to a chemical-looping hydrogen production oxygen carrier, provides a chemical-looping hydrogen production oxygen carrier, which has high reaction activity and avoids cyclic inactivation of the oxygen carrier caused by adding alkali metal K, and provides a chemical-looping hydrogen production oxygen carrier, which is prepared by adding NaAlO2 into a Fe2O3 / Al2O3 oxygen carrier and modulating through alkali metal Na. The designed CO2 trapping device comprises a gas distribution system, a steam generator, a coal high-temperature feeding hopper, a reactor, an automatic temperature control device, a cyclone separator, a condenser and a gas collecting and testing system. Fuel can befully pyrolyzed, the energy for solid fuel gasification can be reduced, the energy consumption is reduced, and the system has an industrial value.

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a rodlike mesoporous molecular sieve silica gel composite material as a supporter, a preparation method of the isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and an application of the isobutane dehydrogenation catalyst in isobutene preparation by isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises the following steps: (a) preparing mesoporous material raw powder; (b) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a rod-like mesoporous molecular sieve; (c) preparing a rodlike mesoporous molecular sieve silica gel composite material supporter; and (d) carrying out dipping treatment on the rod-like mesoporous molecular sieve silica gel composite material supporter in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying treatment and roasting treatment. The obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbondeposition resistance.