58results about How to "Improve catalytic conversion" patented technology

This invention relates to a catalyst and a process for treating heavy hydrocarbons using the catalyst. The catalyst is useful for treating heavy hydrocarbons, de-metallize oil (DMO) and is particularly useful in VGO/DMO hydrocarbon blend. It is also useful for DAO. The catalyst acts to catalytically convert the VGO/DMO blend to shorter-chain valuable hydrocarbon products. The catalyst includes a catalytic support material, a catalytic metal impregnated upon the catalytic support material, and a promoter metal on the catalytic support material to enhance catalytic conversion. The combination of the catalytic support material with catalytic metal and promoter metal is operable to catalytically convert VGO/DMO into hydrocarbon products having shorter carbon chains.

The invention relates to a cubic mesoporous molecular sieve catalyst with micropore canals, a preparation method and use thereof. The catalyst comprises the raw materials of an aluminium source, a silicon source, sodium hydroxide, a template, surfactant and de-ionized water, and is prepared through the following steps: firstly preparing a silicon-aluminium precursor; and then utilizing a self-assembly function between the precursor and the surfactant to obtain stable molecular sieve materials. The preparation method comprises two methods of hydro-thermal synthesis and microwave synthesis. Dueto the adoption of the microwave synthesis method, the cubic mesoporous molecular sieve catalyst in the invention has the advantages of shortening the crystallization time, obtaining a synthesized molecular sieve with a cubic mesoporous structure, having micropore canals, having acid strength similar to that of a ZSM-5 molecular sieve, and having relatively higher catalytic activity when used forthe catalytic cracking reaction of 1,3,5-tri-isopropyl benzene.

The invention relates to the technical field of denitration, in particular to a selective catalytic reduction denitration catalyst, a preparation method and application thereof. The catalyst is prepared from a carrier, transition metal oxide loaded on the carrier, and a rare earth modification additive, as well as a rare earth metal polymer distributed on the carrier as a porous mesh metal frame structure, wherein the total load capacity of the transition metal oxide, the rare earth modification additive and the rare earth polymer on the carrier is 25-35%. The catalyst disclosed by the invention is excellent in catalytic activity at a temperature interval from 200 DEG C to 400 DEG C; the denitration conversion ratio can be up to 90% above; meanwhile, the trace of rare earth modification additive is added to the catalytic system to effectively improve the sintering resistance of the catalyst; the catalyst can effectively improve the lead and sulfur toxic resistance of the catalyst, widens the low temperature reaction window, and prolongs the service life of the catalyst.

The invention belongs to the technical field of energy material, and particularly relates to a Fe-CNx nano composite catalyst as well as a preparation method and the application of the catalyst. The preparation method comprises the steps of firstly dipping soluble iron salt onto a molecular sieve; after that, feeding organic amine into a tube furnace, and treating by microwave heating to obtain a nitrogen-doped carbon nanotube CNx; loading iron salt onto the carbon nanotube CNx to obtain the final Fe-CNx nano composite catalyst. The preparation method is simple in technology, easy to control, wide in raw material source and low in price of raw material; the obtained Fe-CNx nano composite catalyst is good in repeatability, can be used for coal direct liquefaction hydrogenation catalytic reaction, and is capable of effectively improving the hydrogenation effect of the coal liquefaction reaction, so that the oil yield and the conversion rate of coal liquefaction are improved. Furthermore, when the catalyst is applied to the coal direct liquefaction hydrogenation catalytic reaction, microwave heating is adopted, so that the temperature of a reaction system rapidly rises, a sample is more evenly heated, the reaction time is shortened, and the reaction energy consumption is reduced.

The invention relates to a three-way catalyst for preparing glyceric acid by oxidizing glycerol and a preparing method thereof. In the three-way catalyst, precious metal serves as an active component,rare earth oxide and carbon nanotubes serve as a carrier, and the mass ratio of the precious metal, the rare earth oxide and the carbon nanotubes is (0.02-0.05):(1.0-3.0):1.0; the carbon nanotubes are selected from at least one kind of unprocessed carbon nanotubes, carbon nanotubes oxidized with concentrated nitric acid, carbon nanotubes oxidized with concentrated sulfuric acid, carbon nanotubesprocessed with KON and carbon nanotubes processed with PEG. Compared with a metal/carbon-carrier binary catalyst, the three-way catalyst has higher catalytic activity and higher glyceric acid selectivity in the process of a glycerol selective oxidation reaction conducted under the neutral condition. The preparing method is easy and convenient to operate, instrument equipment is simple, and energyconsumption is low.

The invention discloses a nickel-copper-rare earth-aluminum oxide catalysis separation composite film and a preparation method and the application thereof. The method includes adopting an electroplating method to plate a nickel-copper-rare earth film on the surface of a porous through hole anode alumina film. In the preparation process, the nickel-copper-rare earth film bonded to a cathode and plated on the face is compact in structure, and the thickness of the nickel-copper-rare earth film is 0.1-0.5mum. Finally, the nickel-copper-rare earth-aluminum oxide catalysis separation composite film with multiple nanometer holes on one face and the nickel-copper-rare earth film on the other face is formed. The nickel-copper-rare earth-aluminum oxide catalysis separation composite film is applied to reproduction of hydrogen by catalyzing methane and water vapor and separation of hydrogen in mixed gas. Finally, the methane catalysis and conversion rate is 100%, the hydrogen transmission rate is 7.52-8.02*10-6mol*m-2*s-1Pa-1, the separation coefficient of the hydrogen obtained in reproduction of hydrogen by catalyzing methane and water vapor is 996-1002, and the separation coefficient of the hydrogen in the mixed gas is 1000-1008.

The invention discloses a device for utilizing desulfurization waste liquid and an operation method thereof. The device comprises a pretreatment adjusting section, a drying curing and tail gas section, a sulfur burning section, a cooling section, a washing section, a conversion absorption section and a tail gas treatment section. The invention further provides an operation method of the device forutilizing the desulfurization waste liquid, wherein comprehensive treatment is conducted on the desulfurization liquid and sulfur foam generated in the coking HPF wet desulfurization process, so thatthe waste is turned into resources, internal circulation is achieved, secondary pollution is eradicated, the production cost is saved, automatic control is achieved, and energy consumption is reduced. Sulfuric acid is prepared through the two-conversion and two-absorption process, a vanadium catalyst is used, a converter uses a refractory fiber adhesive, a ceramic fiber plate and a refractory fiber reinforced coating, the catalytic conversion rate of sulfur dioxide is increased, and the conversion rate is larger than or equal to 99.75%.

The invention discloses a preparation method of 1-bromoethyl acetate, which comprises the following steps: under the catalysis of aluminum oxide, reacting acetyl bromide with paracetaldehyde; and then, extracting with dichloromethane/water to obtain the high-purity 1-bromoethyl acetate. According to the method, the paracetaldehyde is used instead of acetaldehyde in the traditional process, and the aluminum oxide is used for catalysis preferably, so that the method is environment-friendly, is easy to realize quantification and ensures high yield and purity of the product; and meanwhile, the process conditions of the method are mild and easy to control, thereby being suitable for industrial production.

The invention discloses a catalyst which comprises a carrier and an active component dispersed over the carrier and is characterized in that the carrier is selected from at least one of inorganic oxides; the carrier comprises macropores and mesoporouses; the active component comprises an active element; the active element comprises a ferrum element; the ferrum element is ferrum and/or cobalt. The catalyst, as a high-temperature stable catalyst of a carbon dioxide reforming methane reaction, can produce synthetic gas and achieves emission reduction and recycling of carbon dioxide. Under a reaction condition of normal atmosphere and 800 DEG C, the multilevel pore loading metal catalyst shows excellent comprehensive catalytical performance and has very good stability, sintering resistance and carbon deposit resistance in addition to high activity and good selectivity.

The catalyst in this present application includes a support and an active component dispersed on/in the support; wherein the support is at least one selected from inorganic oxides and the support contains macropores and mesopores; and the active component includes an active element, and the active element contains an iron group element. As a high temperature stable catalyst for methane reforming with carbon dioxide, the catalyst can be used to produce syngas, realizing the emission reduction and recycling utilization of carbon dioxide. Under atmospheric pressure and at 800° C., the supported metal catalyst with hierarchical pores shows excellent catalytic performance. In addition to high activity and good selectivity, the catalyst has high stability, high resistance to sintering and carbon deposition.

The invention discloses an acetylene hydrochloride high-dispersity nanometer mercury-free catalyst and a preparation method thereof. The catalyst is prepared from PtCl2 serving as a main catalyzing component, KCl and InCl3 serving as catalyzing assistants, TiO2 which is less than 5nm in particle diameter serving as a dispersing agent and nitrogen-doped active carbon serving as a carrier by an ultrasonic stepwise impregnation-microwave drying method. The catalyst has the advantages of high dispersity, small active site, narrow particle size distribution, good carbon deposition resisting effect, high catalytic conversion rate, short induction period and long service life.

The invention discloses a method for biologically catalyzing hydrocarbylation of catechols. The method comprises the steps that catechol-O-methyltransferase serves as a catalyst, an S-adenosyl methionine analogue serves as a hydrocarbyl donor, hydrocarbylation of the catechols is achieved through enzymatic catalysis, and corresponding products are obtained. The method has the advantages of being mild in reaction condition, environmentally friendly, easy to operate, wide in applicable range of raw materials, high in catalytic conversion rate and good in chemical and regional selectivity; in addition, cyclic regeneration of the hydrocarbyl donor can be achieved by adding a solid acid catalyst.

The invention discloses a nickel-modified molecular sieve SCR catalyst and a preparation method thereof, and relates to the technical field of catalyst preparation. The molecular sieve SCR catalyst comprises a ZSM-5 zeolite molecular sieve and a nickel element. The preparation method comprises the following steps: first, dipping nickel nitrate solution in the ZSM-5, and stirring for 24 hours at 75 to 85 DEG C; then, drying for 3.5 to 4.5 hours at 115 to 125 DEG C; next, roasting for 3.5 to 4.5 hours at the high temperature of 540 to 560 DEG C; finally, naturally cooling to room temperature to obtain the molecular sieve SCR catalyst. According to the nickel-modified molecular sieve SCR catalyst and the preparation method thereof, the problem of reducing NOx to N2 with catalysis in a low-temperature environment is solved; the conversion rate of the NOx reaches 98 percent or above; the reaction speed is faster than that at a high temperature; the catalyst is safe and has no biotoxicity.

The invention discloses a catalytic purifier selective reduction ultrasonic vaporization method acting on tail gas purification. An external power source is connected into an electric control PLC, theelectric control PLC supplies power to a PID, and the PID controls an entire post-processing circulation system. Compressed air is led into an AdBlue tank to form micro-pressure, urea liquid is fed into an ultrasonic atomization working chamber, and the urea liquid is ultrasonically atomized and then enters a catalytic muffler purifier through a pipeline. Urea is detected by a nitrogen oxygen sensor so as to obtain the conversion rate of converting to the nitrogen oxide PPM value, the conversion rate is transmitted to the PID through a CAN signal, the PID calculates the amount of atomized urea required to obtain the nitrogen oxide PPM value, the current voltage value of MOS is obtained, the MOS controls an ultrasonic atomization generator to convert the urea liquid into atomized urea, theatomized urea is fed into the catalytic muffler purifier, and the whole process forms a CAN signal cycle. According to the catalytic purifier selective reduction ultrasonic vaporization method actingon the tail gas purification, the urea liquid is converted into the atomized urea through ultrasonic waves, the use of a high-precision nozzle is abandoned, and the problem of urea crystallization isfurther solved.