41results about How to "Facilitate catalytic conversion" patented technology

Methods and systems for pressure swing absorption for hydrogen generation are presented. In one embodiment, a method includes absorbing at least one oxide of carbon with a pressure swing absorber from a steam reformation of methane. The steam reformation may occur at an ambient pressure in excess of 300 psia and at an ambient temperature in excess of 600° centigrade. The steam reformation of methane produces a stream of product gas. The steam reformation of methane is interrupted allowing the regenerating of the pressure swing absorber at an ambient pressure of less than 10 psia and at an ambient temperature sufficient to calcine the pressure swing absorber to exude carbon dioxide.

A preparation method of aromatic hydrocarbons and low-carbon olefins through co-processing animal and plant oil and an oxygenated chemical is characterized by: introducing raw materials such as the plant oil and the oxygenated chemical into a catalytic cracking reactor; carrying out a catalytic conversion reaction through contacting with a catalytic cracking catalyst in the reactor with an operating temperature of 500 to 670 DEG C, an operating pressure of 0.1 to 5.0 MPa, a weight hourly space velocity of 0.1 to 100 h<-1> and an agent-oil ratio of 1 to 50; separating a reaction oil gas from the spent catalyst when the reaction is finished; recycling the separated spent catalyst after stripping, burning and regenerating; obtaining fractions such as a liquefied gas, gasoline and the like through fractionating the reaction oil gas and obtaining the low-carbon olefins through a manner that the liquefied gas enters a gas separating system; and obtaining the aromatic hydrocarbon product through carrying out a further aromatic extraction on the gasoline fraction. The method provided by the present invention allows the reaction temperature to be controlled through co-processing the plant oil and the oxygenated chemical, the selectivity of the target product gasoline to be improved, and energy consumption to be reduced. In terms of a reaction apparatus, equipment flow is simplified because heat exchangers which are arranged for removing reaction heat can be reduced.

The invention provides an application of a three-dimensional ordered macro-porous perovskite type oxide which is used as an oxygen carrier for preparing hydrogen through a carbonic fuel chemical chain. The three-dimensional ordered macro-porous perovskite type oxide has the characteristics of the perovskite type oxide and has a three-dimensional ordered macro-porous structure of an inverse opal structure. The three-dimensional ordered macro-porous perovskite type oxide is used as an oxygen carrier for preparing the hydrogen through the carbonic fuel chemical chain and has a general formula of ABO3, wherein A is rare-earth metal and B is transition metal. The three-dimensional ordered macro-porous structured perovskite structure has stable properties and longer service life; pore channels and specific surface area are bigger; during a contact process of the oxygen carrier and a carbonic fuel, much more lattice oxygen for participating in reaction can be supplied; the contact of the oxygen carrier and the carbonic fuel can be boosted; the specific surface area of the oxygen carrier can be increased by abundant pore channels; catalytic conversion between small particles and gas molecules is boosted; the three-dimensional ordered macro-porous perovskite type oxide has higher reaction activity in chemical chain combustion and steam pyrolytic decomposition; and compared with the conventional metal oxygen carrier, the three-dimensional ordered macro-porous perovskite type oxide has higher reaction activity and hydrogen yield.

The invention discloses a catalyst with high carbon dioxide hydrogenation methanation performance. The catalyst comprises, by weight, 45-60% of main active components, 5-15% of precious metal active components, 2-8% of structural promoters, 5-15% of rare earth promoters and the balance vectors. The catalyst has the advantages that the catalyst is excellent in carbon dioxide methanation reaction performance, and accordingly hydrogen components in methanation products can be effectively reduced.

The invention provides a low-temperature flue gas denitration agent, and belongs to the technical field of denitration purification of flue gas. The low-temperature flue gas denitration agent is prepared from the components in parts by weight: 30-80 parts of active components, 0.1-10 parts of an additive, 1-20 parts of a carbon source, and 2-30 parts of a binder; the active components are one or more of CaCO3, CaO and Ca(OH)2; the additive is one or more of Fe2O3, MnO2, CuO and Co2O3; the carbon source is one or more of activated carbon, an activated carbon fiber, pulverized coal, fly ash, flying ash and a biomass fiber; and the binder is one or more of kaolin, bentonite, gypsum and cement. The invention further provides a preparation method of the denitration agent. The denitration agentis low in raw material cost, good in denitration effect and high in denitration capacity, and the using temperature can be decreased to room temperature. The denitration agent is matched with a dry moving bed denitration technology or a fixed bed dry denitration technology, and thus the denitration and dust removal effects are achieved in the application process.

The invention provides a nitrogen-phosphorus-doped carbon composite iron phosphide three-dimensional rod-like porous material, a lithium battery diaphragm, a preparation method of the lithium batterydiaphragm, a lithium-sulfur battery and electric equipment. A preparation method of the nitrogen-phosphorus-doped carbon composite iron phosphide three-dimensional rod-like porous material comprises the following steps: mixing raw materials including an iron source, a nitrogen-containing organic matter, phytate and an organic solvent, and drying to obtain a precursor; and carrying out heating treatment on the precursor to obtain the nitrogen-phosphorus-doped carbon composite iron phosphide three-dimensional rod-like porous material for the lithium-sulfur battery diaphragm. The preparation method of the lithium battery diaphragm comprises the following steps: mixing raw materials including the nitrogen-phosphorus doped carbon composite iron phosphide three-dimensional rod-like porous material, a binder and a solvent and dispersing to obtain coating slurry; and coating the surface of a diaphragm base material with the coating slurry to obtain the lithium battery diaphragm. According to the nitrogen-phosphorus-doped carbon composite iron phosphide three-dimensional rod-like porous material, the lithium battery diaphragm, the preparation method of the lithium battery diaphragm and thelithium-sulfur battery, the shuttle effect can be effectively solved, and the electrochemical performance of the lithium-sulfur battery is improved.

The invention relates to a catalyst based on volatile organic pollutant purification and a preparation method thereof. A catalyst carrier is coated with an oxidizing catalyst coating, and the oxidizing catalyst coating contains a ZSM-5 molecular sieve, an Mn-Co-Zr composite oxide, ZrO2 sol and noble metal Au. The preparation method comprises an Mn-Co-Zr composite oxide synthesis step, a catalyst slurry preparation step and a catalyst slurry coating step. The catalyst can effectively catalyze oxidation of discharged pollutants, and can oxidize gas-phase pollutants, organic pollutants, CO and the like into harmless gas CO2 and H2O, so that requirements of emission regulations are met. The preparation method disclosed by the invention is simple, and the steps are easy to operate. The catalystprepared by the preparation method disclosed by the invention has good low-temperature ignition activity on organic pollutants and has a low CO ignition temperature, so that the reaction of the organic pollutants is promoted, and good durability is achieved.

The invention relates to a zwitter-ion-rich covalent organic framework material as well as a preparation method and application thereof. The covalent organic framework material is prepared by taking 3, 8-diamino-6-phenyl phenanthridine and benzenetricarboxaldehyde as raw materials and introducing sulfo groups through a post-modification method. According to the invention, sulfo groups are introduced to a COF skeleton, so that the COF skeleton has positive and negative charges; wherein positively charged nitrogen atoms and negatively charged sulfo groups not only can inhibit the loss of an active substance sulfur in the lithium-sulfur battery, but also can promote the catalytic conversion of polysulfide, so that the cycle performance of the lithium-sulfur battery can be remarkably improved.

The invention belongs to the technical field of lithium-sulfur batteries, and particularly relates to a bimetallic phosphide embedded carbon hollow nanocage and a preparation method and application thereof. The preparation method comprises the following steps: dispersing a nickel-cobalt Prussian blue derivative in a liquid medium, preparing dispersion liquid, adding dopamine hydrochloride into the dispersion liquid, and preparing nickel-cobalt prussian blue wrapped by the polydopamine; calcining the nickel-cobalt Prussian blue derivative wrapped by the polydopamine to prepare a nickel-cobalt bimetallic particle embedded carbon hollow nanocage; taking hydrogen phosphide as a phosphating agent, and carrying out one-step phosphating on the carbon hollow nanocage inlaid with the bimetallic particles to prepare the carbon hollow nanocage inlaid with the bimetallic phosphide; preparing a dispersion liquid from a bimetallic phosphide embedded carbon hollow nanocage, carbon black and polyvinylidene fluoride, then coating a polypropylene diaphragm with the dispersion liquid, and performing drying to prepare a multifunctional diaphragm. The comprehensive performance of the lithium-sulfur battery is remarkably improved.

The invention relates to a preparation method of a conjugated microporous polyaniline modified battery current collector and an application of the conjugated microporous polyaniline modified battery current collector in a lithium-sulfur battery, and the preparation method comprises the following steps: adding tris (4-bromoaniline) and a linker into a solvent in a nitrogen atmosphere, and uniformly stirring to prepare a to-be-reacted solution; adding an oxidizing agent, a catalyst and NaF into the solution to be reacted, and reacting to obtain conjugated microporous polyaniline powder; the preparation method comprises the following steps: mixing conjugated microporous polyaniline powder with a binder, and carrying out ball milling to form current collector modified slurry; and brushing the current collector modified slurry onto the surface of a battery current collector, and drying to obtain the conjugated microporous polyaniline modified current collector. According to the invention, the functions of adsorbing polysulfide, inhibiting a shuttle effect and buffering and protecting the structure of the current collector are realized, and efficient transmission of electrons from an external circuit can also be ensured; when the current collector with the polyaniline modified coating is applied to a lithium-sulfur battery, the current collector with the polyaniline modified coating can effectively improve the cycling stability of the battery and shows a long service life of the battery.

The invention discloses a preparation method and application of Ni-doped hierarchical porous ZSM-5 molecular sieve. The preparation method includes the steps of pretreating a molecular sieve, namely roasting to remove a templating agent and water; etching the molecular sieve with HF (hydrofluoric) acid solution to generate a hierarchical porous structure; loading high-activity metallic nickel by impregnation; carrying out sheeting and screening. Application of the molecular sieve herein in catalytic quick pyrolysis of biomass is also disclosed. The zeolite HZSM-5 that is low in price and easyto obtain is used herein as a matrix; desilication and dealumination treatment is performed while fiver-membered and ten-membered ring intersection micro porosity of the matrix is utilized, so that hierarchical pores good for entering of macromolecules are generated. The preparation method herein allows acid site distribution to be reduced at the premise of pore expansion; on such basis, the low-price metallic nickel with high hydrogen transfer capacity is added, so that high passing rate and high conversion rate of macromolecules during catalysis are achieved. A catalyst prepared via the preparation method has the advantages of low price, good access convenience, and simple process, is mainly applicable to the catalytic pyrolytic test of biomass or coal, and has a good prospect of catalytic reforming of pyrolytic volatiles.

The invention belongs to the field of solid waste treatment, and particularly discloses a solid waste pyrolysis liquid-phase product impurity removal and grading method and a product. The method specifically comprises the following steps: mixing a lithium-based molten salt temperature regulating agent with calcium-magnesium composite molten salt to obtain a primary molten salt system, introducinga solid waste pyrolysis liquid-phase product into the primary molten salt system, heating, and keeping the temperature for a preset time, thereby realizing low-temperature impurity removal and obtaining a primary liquid-phase product; mixing a transition metal catalyst with sodium-potassium composite molten salt to obtain a secondary molten salt system, introducing the primary liquid-phase productinto the secondary molten salt system, heating, and keeping the temperature for a preset time, thereby realizing high-temperature upgrading and obtaining a secondary liquid-phase product; and carrying out condensation separation on the secondary liquid phase product, and respectively collecting uncondensed gas and a clean homogenized liquid phase product. According to the method, the solid wastepyrolysis liquid-phase product is subjected to grading treatment by adopting a molten salt cascade treatment method, so that the generation of pollutants is reduced, the production efficiency is improved, and meanwhile, the effective treatment of the solid waste pyrolysis liquid-phase product is realized.

The invention belongs to the field of new energy materials and devices, and discloses a porous carbon loaded europium oxide material as well as a preparation method and application thereof. Porous carbon and europium nitrate are mainly used as raw materials, a pH value control deposition method is adopted for preparation at room temperature, a carbon precursor can be obtained through ultrasonic treatment, stirring, suction filtration and drying, nitrogen is introduced into the precursor in a tubular furnace, calcination is performed at 700-1000 DEG C, and the porous carbon loaded europium oxide material can be obtained. The material can be used as a lithium-sulfur battery diaphragm modification material. Under the multiplying power of 0.05 C (1C = 1675mAh/g), the specific discharge capacity of the first circle can reach 1610mAh/g, and under the multiplying power of 1C, after 500 circles of circulation of a battery assembled by using the Ketjen black-loaded europium oxide material for the diaphragm modification layer, the capacity attenuation rate of each circle is only 0.05%, and compared with a blank diaphragm coated with Ketjen black and uncoated materials, the specific capacity is increased obviously and the excellent cyclic stability is realized.

Processes for reforming a hydrocarbon feedstock by selectively reforming different sub-components of the feedstock using at least two compositionally-distinct reforming catalysts. Advantages may include a decreased rate of reforming catalyst deactivation and an increased yield of a liquid hydrocarbon reformate product that is characterized by at least one of an increased octane rating and a decreased vapor pressure (relative to conventional one-step reforming processes and systems).

The invention discloses a process for preparing sulfuric acid by blending and burning pyrite concentrate with ferrous sulfate. The process comprises the following steps: S1, preparing preparation equipment; s2, raw material treatment; s3, roasting is carried out; s4, a purification step; s5, carrying out dry suction; s6, carrying out conversion; and S7, preparing a finished product. According to the process for preparing sulfuric acid by blending combustion of pyrite concentrate with ferrous sulfate, the internal diffusion resistance can be reduced and the contact area between air and ore can be increased due to the small particle size of the pyrite concentrate with the particle size of 3mm, the measure is most effective for controlling the total roasting rate through oxygen diffusion, and the total roasting rate can be controlled by increasing the oxygen content of furnace entering gas; the oxygen concentration in the atmosphere is high, external diffusion and internal diffusion cone power of oxygen is large, the diffusion rate of the oxygen is high, the oxygen content in the furnace gas can be increased, catalytic conversion of So2 is facilitated, the process is simple and convenient, the cost is low, and sulfuric acid with high purity can be prepared.