36results about How to "Facilitated catalytic cracking" patented technology

The invention relates to a method for promoting heavy oil catalytic pyrolysis and improving propylene yield and selectivity. The method is mainly characterized in that one or a mixture in a small amount of methanol, ethanol, propyl alcohol, butyl alcohol and other small-molecule alcohol is fed with heavy oil, so that the conversion rate of the heavy oil can be obviously promoted, and the yield of liquefied gas and propylene can be improved. Compared with other technologies for increasing the production of propylene by heavy oil catalytic cracking or catalytic pyrolysis, the invention improves the yield and selectivity of propylene generated by catalytic pyrolysis by introducing a small amount of alcohols, thereby having the advantages of convenient implementation, obvious effect, prominent economic benefit and the like. For dry gas hydrogen-producing enterprises, the hydrogen content of the dry gas can be obviously increased after the introduction of alcohols, and therefore, the invention is beneficial to improving the hydrogen yield of a dry gas hydrogen-producing device.

The invention provides a method for preparing a catalyst for use in the production of o-phenylphenol. The method prepares the catalyst for use in the production of the o-phenylphenol through processes of carrier pretreatment, immersion, drying and activation, assistant addition, roasting and the like. The catalyst has high activity, selectivity and stability at high temperature.

The invention relates to a preparation method of a mesoporous aluminum oxide binder, and an application thereof in a heavy oil catalytic-cracking catalyst. In the method, a mesoporous aluminum oxide molecular sieve is employed as an aluminum source to prepare a glue solution of the mesoporous aluminum oxide binder through acidifying peptization, wherein the binder can replace a conventional binder in preparation of the heavy oil catalytic-cracking catalyst. Compared with the conventional binder, the mesoporous aluminum oxide binder has a mesoporous structure, large specific surface area and high pore volume. The catalyst, compared with a catalyst prepared with the conventional binder, prepared through the mesoporous aluminum oxide binder is increased in heavy oil conversion rate and light oil yield, is reduced in coke yield and heavy oil yield, and has a better heavy oil catalytic-cracking performance.

The invention discloses a preparation method of a beta molecular sieve. The preparation method comprises the steps of: 1. synthesis of initial gel: mixing a silicon source, an aluminum source, a template agent, an alkaline metal source, water and a beta molecular sieve seed crystal evenly to synthesize an initial gel, wherein the silicon source is calculated in terms of SiO2, the aluminum source is calculated in terms of Al2O3, the template agent is calculated in terms of TEA<+>, the alkaline metal source is calculated in terms of Na2O, and the raw materials for synthesizing the initial gel are in the following mole ratios that: SiO2/Al2O3=25-150:1, TEA<+>/SiO2=0.07-0.23:1, Na2O/SiO2=0.03-0.12:1, and H2O/SiO2=3.0-11.5:1, the beta molecular sieve seed crystal has a Si-Al ratio of SiO2/Al2O3=20-100:1, and in terms of mass, the adding amount is 0%-10% of the mass of SiO2; and 2. microwave heating crystallization reaction: conducting microwave heating treatment on the initial gel preparedby step 1, controlling the heating temperature at 120DEG C-180DEG C and the heating time at 4-25h, thus obtaining a beta molecular sieve product. The method provided by the invention can synthesize the beta molecular sieve with high crystallinity and abundant pore structures by only one step, and compared with the conventional hydrothermal synthesis method, the method provided by the invention cangreatly shorten the synthesis time of the beta molecular sieve, the grain size of the molecular sieve is smaller, and the pore channels are smoother.

A preparation method of a hierarchical pore carbon-based catalyst for catalytic reforming of coal tar belongs to the technical field of preparation of catalysts for catalytic reforming of coal tar, and can solve a problem that the large diffusion resistance of existing microporous carbon-based catalysts having a small pore size is not conducive to the proceeding of a catalytic reaction. The methodcomprises the following steps: carrying out steam activation on low metamorphic coal under the catalysis of a calcium-containing mineral matter to obtain semi-coke with a hierarchical pore structure,and using the semi-coke with the hierarchical pore structure as a carrier to support an active metal in order to prepare the carbon-based catalyst with a hierarchical pore structure. The catalyst hasdeveloped microporous and mesoporous structures, so the diffusion of heavy components in the tar in the pores of the catalyst and the contact of the heavy components with active sites are benefited,and the catalyst has a good catalytic effect in the catalytic reforming of coal tar, and has a broad application prospect.

The invention relates to a biomass iron-containing agglomerate for producing combustible gas and DRI, and a preparation method thereof, belonging to the technical field of iron making. The iron-containing agglomerate of the invention comprises, by mass, 50-60 parts of biomass, 100-200 parts of an iron-containing raw material, 5-10 parts of additives and 3-5 parts of a binder, wherein the additivescomprise sodium carbonate, laterite nickel ore, dolomite and plant ash. The iron-containing agglomerate of the invention reduces the thermal stability of the biomass and its decomposition products; the biomass acts as a reducing agent for iron oxide and a C source and an H source for combustible gas; the iron oxide acts as an iron source for steel preparation and an oxygen source for production of CO through reactions of carbon; so the iron-containing agglomerate promotes the catalytic cracking of tar and the biomass and its decomposition products, improves the gasification yield biomass andincreases the metallization rate of DRI.

The invention discloses a preparation method of a beta molecular sieve. The method comprises the following steps: step 1, synthesizing initial gel: mixing a silicon source, an aluminum source, an alkaline metal source and water, and performing uniform stirring to synthesize the initial gel, wherein based on SiO2 of the silicon source, Al2O3 of the aluminum source, and Na2O of the alkaline metal source, molar ratios of raw materials for synthesizing the initial gel are as follows: SiO2/Al2O3=(30-150):1, Na2O/SiO2=(0.03-0.35):1, and H2O/SiO2=(3.0-50.0):1; step 2, performing microwave treatment on the initial gel: adding a beta molecular sieve seed crystal into the initial gel prepared in the step 1, wherein a ratio of silicon to aluminum in the seed crystal is as follows: SiO2/Al2O3=(20-100):1, and the adding amount is 3%-25% by mass of SiO2, performing uniform mixing, and performing microwave heating treatment to obtain crystallized precursor gel; and step 3, performing a crystallization reaction: performing a crystallization reaction on the crystallized precursor gel obtained in the step 2 by microwave heating to obtain the beta molecular sieve product, wherein the reaction temperature is 140-180 DEG C, and the reaction time is 4-20 h. According to the method provided by the invention, the molecular sieve obtained by the method has a smaller particle size, a rich pore structureand a relatively-smooth channel, thereby facilitating promoting catalytic cracking and isomerization.

The invention relates to a method for preparing combustible gas through co-pyrolysis of sludge and biomass, and belongs to the field of environmental protection and energy. Municipal sludge is dried,and the dried municipal sludge and biomass are respectively crushed; the crushed municipal sludge is mixed with the biomass, wherein the mass ratio of the biomass in the mixture is 20-80%; the mixtureis placed in a reactor to be pyrolyzed at 700-900 DEG C, and generated gas is used as combustible gas. After wood flour is doped into the sludge, catalytic cracking of tar is promoted, the yield of co-pyrolysis product tar is reduced, and the gas yield is increased. Particularly, when the mixing ratio of the wood flour is 20% at 900 DEG C, the volume percentage of the combustible gas is obviouslyincreased and is 20.47% higher than the theoretically calculated value, and the calorific value of the gas is increased by 47.02%.

The invention discloses a method for preparing ultra-clean graphene by utilizing copper acetate. The method comprises the following steps: sequentially putting the copper acetate and copper substrates at intervals in directions of an air path from upstream to downstream; introducing hydrogen for chemical gas phase deposition; obtaining the ultra-clean graphene after deposition is completed, wherein temperature of a temperature zone in which the copper acetate is located is volatilization temperature of the copper acetate. The preparation method is simple, raw materials are easy to get, the cleanliness of the graphene is superior to a result obtained by growth of methane, so that a single layer of graphene film with ultra-cleanliness and high quality can be obtained; moreover, the graphene film has great application prospects in the fields of optics, electricity and the like.

The invention discloses a preparation method of a coal catalyst. The method comprises the following steps: mixing aluminum orthoarsenate and an ammonium phosphate solution, and calcining a mixture toobtain phosphorus-modified aluminum arsenate, mixing the phosphorus-modified aluminum orthoarsenate and an erbium acid ammonium solution to obtain a catalyst precursor, and then calcining the catalystprecursor to obtain the catalyst. The invention also discloses a method for catalyzing the hydropyrolysis of low metamorphic coal by using the catalyst, in the present invention, the aluminum orthoarsenate is firstly modified to obtain an acid-enhanced carrier, the active component erbium is then supported on the carrier, and the obtained catalyst can promote a catalytic cracking process of the coal macromolecule, the dispersion of the active component of the catalyst on the carrier is also improved, which promotes the catalytic hydrogenation and pyrolysis process of coal, and improves the tar yield of catalytic hydrogenation pyrolysis of low metamorphic coal.

The invention provides a downer reactor light hydrocarbon catalytic converting method and device. The method specifically includes the following steps of firstly, making a preheated or non-preheated light hydrocarbon raw material and a low-temperature regenerant from a regenerant cooler enter the inlet end of a downer reactor and flow downwards along the reactor for catalytic cracking and other reactions, and making a mixture of reaction oil gas and a catalyst go downwards to the tail end of the reactor to be rapidly separated so that the catalyst and the oil gas can be rapidly separated, wherein the main operation conditions include the reaction temperature of 520-680 DEG C, the reaction pressure of 0.11-0.4 MPa, the contact time of 0.05-2 seconds and the agent-to-oil ratio of 6-50; secondly, making a separated to-be-generated agent enter a regenerator to be burned and regenerated after the to-be-generated agent is subjected to steam stripping through a to-be-generated agent stripper,wherein the regeneration temperature is controlled to be 630-730 DEG C; thirdly, making a regenerant from the regenerator enter the regenerant cooler to be cooled into 200-720 DEG C, and making the regenerant recycled in the downer reactor.