201results about "Calcination" patented technology

The invention relates to a multi-airflow alternating temperature calcining device for ultra-long nitride single crystal nanofibers. The multi-airflow alternating temperature calcining device comprises a reaction furnace; the mechanical vacuum pressure gauge and the exhaust port are arranged at the top of the reaction furnace; the reaction furnace chamber is arranged in the reaction furnace; the multi-reaction-zone graphite furnace body is arranged in the reaction furnace chamber and comprises a first low-temperature zone, a second high-temperature zone and a third low-temperature zone which are sequentially arranged from bottom to top and are not in contact with one another; the electromagnetic heating controller is arranged on the periphery of the multi-reaction-area graphite furnace body; the graphite boat is movably arranged in the multi-reaction-area graphite furnace body; the movable alumina crucible is arranged in the graphite boat; the graphite columns are arranged at the top and the bottom of the multi-reaction-zone graphite furnace body; the hydraulic cylinder is connected with the graphite column; and a control assembly. Compared with the prior art, the method has the advantages that the nitridation reaction process can be accurately controlled, the fiber quality and the crystal integrity can be improved, and independent and accurate temperature control can be realized.

According to the system for preparing the composite inorganic material from the coal gangue provided by the invention, the system consisting of the pretreatment device, the reaction device, the heating device and the overflow pipeline is constructed, so that the coal gangue is efficiently utilized as a reaction material, and the problems of environmental pollution and resource waste caused by accumulation of the coal gangue are effectively solved. Moreover, by utilizing the system provided by the invention, valuable chemical components such as silicon and aluminum which are rich in the coal gangue can be efficiently recycled, resource recycling of wastes is promoted in an assisting manner, and the source of high-performance inorganic materials is expanded.

Disclosed is a zirconium- and cerium-based mixed oxide composition exhibiting high reducibility, a method for preparing the same, and uses thereof in the field of catalysis.

The invention relates to the development made in the vertical kiln subject to the application numbered 2021 / 012627, which is designed to be used in calcination and / or drying processes in industrial plants operating in the mining sector.

A hydrogenation catalyst contains a hydrogenation catalyst carrier and an active hydrogenation component. The active hydrogenation component includes a Group VIB metal sulfide and a Group VIII metal compound, and the molar proportion of a substance of the Group VIII metal compound that interacts with the Group VIB metal sulfide to the total amount of the Group VIII metal compound is 60-100%. The hydrogenation catalyst has a higher active metal sulfurizing degree and a higher number of type II active centers, and can be applied to the hydrogenation treatment process of oil products such as distillate oils and residual oils.

A process for calcining aluminium trihydrate (Al2O3.3H2O) to form alumina (Al2O3) replaces at least a part of a natural gas energy source for generating heat for use in a calciner with an electrical energy source. The process may comprise using at least one electrically-heated fluidized bed reactor for calcining aluminium trihydrate.

A method for producing a synthetic fuel from hydrogen and carbon dioxide comprises extracting hydrogen molecules from hydrogen compounds in a hydrogen feedstock to produce a hydrogen-containing fluid stream; extracting carbon dioxide molecules from a dilute gaseous mixture in a carbon dioxide feedstock to produce a carbon dioxide containing fluid stream; and processing the hydrogen and carbon dioxide containing fluid streams to produce a synthetic fuel. At least some thermal energy and / or material used for at least one of the steps of extracting hydrogen molecules, extracting carbon dioxide molecules, and processing the hydrogen and carbon dioxide containing fluid streams is obtained from thermal energy and / or material produced by another one of the steps of extracting hydrogen molecules, extracting carbon dioxide molecules, and processing the hydrogen and carbon dioxide containing fluid streams.

The invention relates to the technical field of high-temperature acid gas adsorbent preparation, in particular to high-temperature acid gas adsorbent manufacturing equipment and a high-temperature acid gas adsorbent manufacturing process. The high-temperature acid gas adsorbent manufacturing equipment comprises a supporting table, a vibration part is fixedly arranged on the right side of the supporting table, a mixing barrel is fixedly connected to the inner wall of the supporting table, and a fixing plate is fixedly connected to the bottom of the mixing barrel; the top of the mixing cylinder is fixedly connected with a supporting ring, the top of the supporting ring is fixedly connected with a cover plate, the vibration part comprises a supporting plate, and the left side of the supporting plate is fixedly connected with the right side of the supporting table. According to the invention, through the periodic vibration of the cylindrical cam and the L-shaped impact block and the combination of the high-speed stirring plate, the material mixing uniformity is obviously improved, the agglomeration phenomenon is reduced, the porosity of the adsorbent is improved to 60-80%, the cross cleaning sheet scrapes the cylinder wall in real time in the mixing process, the material adhesion caused by high-temperature sintering is prevented, the manual cleaning frequency is reduced, and the production efficiency is improved. And the service life of equipment is prolonged by more than 50%.

The present invention relates to a method for preparing an alumina supported perovskite type oxide composition, to an alumina supported perovskite type oxide composition and to the use of such an alumina supported perovskite type oxide composition in catalytic systems in emission control applications.

The invention discloses a novel mineral-based ozone catalyst filler preparation device and method, the preparation device is advanced and low in energy consumption, and the novel mineral-based ozone catalyst filler prepared by the preparation device has an internal unique three-dimensional microporous structure, a huge specific surface area and excellent ion exchange performance. The main performances of the filler comprise: (1) the specific surface area is high, and a large number of adsorption sites are provided; (2) the ion exchange capacity is excellent, and various unfavorable ions in water can be adsorbed and treated; (3) the mechanical strength is high, and the problem of component loss is well solved; (4) the chemical stability is good, good performance can still be kept in an extreme environment, and secondary pollution is avoided; and (5) the internal static electricity is strong, the self-decomposition of ozone in wastewater can be accelerated, and the concentration of (. OH) generated in water is increased, so that the catalytic ozonation effect is improved, and compared with the current catalyst filler in the market, the catalytic ozonation effect can be improved by 2-3 times.

A method and system for preparing lithium carbonate by calcination in a tunnel kiln are disclosed. The method includes: designing and preparing the tunnel kiln; loading raw materials, specifically lithium carbonate raw materials, onto the material car of the tunnel kiln; and calcination heating, heating according to a preset temperature rise curve, controlling the calcination temperature between 870℃ and 920℃. The temperature rise curve is determined using partial differential equations, which describe the temperature changes of the raw materials at different calcination times and in different regions of the tunnel kiln. This application, through an optimized calcination process, enables precise temperature control during calcination, thereby improving the uniformity of calcination temperature, increasing calcination efficiency and thermal energy utilization, reducing energy consumption, improving the product quality of lithium carbonate, and enhancing the reliability and safety of the calcination process.

A sulfur-resistant, high activity methane oxidation catalyst for use in removing methane from gas streams having a concentration of methane by oxidizing the methane. The methane oxidation catalyst is especially useful in processing gas streams that also have a concentration of a sulfur compound. The sulfur-resistant methane oxidation catalyst includes a unique multi-crystalline zirconia as a support for a platinum component and a ruthenium component. The multi-crystalline zirconia contributes to the excellent properties of the catalyst. The platinum and ruthenium components can be included in the methane oxidation catalyst in a specific weight ratio that also contributes to the enhanced properties of the catalyst. The sulfur-resistant methane oxidation catalyst may also include a chloride component that contributes to enhanced properties of the catalyst.

The present disclosure relates to compositions for feedstocks suitable for graphitization. In particular, the present disclosure relates to compositions necessary to produce graphite products having desirable properties using difficult-to-graphitize carbon materials.

A computer-implemented method for predicting one or more parameters of calcinated coke produced by a coke production system includes acquiring data indicative of at least one of one or more feedstock properties, one or more coke heating properties, or one or more coke storage properties, inputting the acquired data into a coke predictive model, and providing by the coke predictive model one or more predicted coke parameters corresponding to a feedstock received by the coke production system and based on the acquired data.

The present specification provides a method for preparing a solid electrolyte for a secondary battery, comprising the steps of: (S1) preparing a material composition comprising phosphorus (P) sulfide, a lithium halide and lithium sulfide; (S2) mechanically milling the material composition in a milling container; and (S3) calcining a compound obtained after the milling step, wherein the calcination step (S3) performs purging using gas.

The present invention provides a catalyst composition having excellent properties for converting sulfur, sulfur compounds, and carbon monoxide contained in a gas stream by catalytic hydrolysis, hydrogenation, and water gas shift reactions. The catalyst comprises a base layer of molybdenum and cobalt and an overlay of molybdenum and cobalt. These metals are present in the catalyst in a certain concentration range and relative weight ratio. The base layer metals are present in the catalyst in a specified range relative to the overlay and total metals. The base layer metals are formed by co-grinding an inorganic oxide with the catalytically active metals molybdenum and cobalt. The co-ground mixture is calcined and then impregnated with overlay molybdenum and overlay cobalt.

A computer-implemented method for predicting one or more parameters of calcinated coke produced by a coke production system includes acquiring data indicative of at least one of one or more feedstock properties, one or more coke heating properties, or one or more coke storage properties, inputting the acquired data into a coke predictive model, and providing by the coke predictive model one or more predicted coke parameters corresponding to a feedstock received by the coke production system and based on the acquired data.

A process for treating a material, such as by a calcination or reduction process, is disclosed that includes reacting hydrogen and oxygen in a reaction chamber to produce heat and steam, venting the steam from the reaction chamber, using the heat to treat the material to produce a treated material, and returning at least a portion of the steam vented from the reaction chamber to the process. An apparatus is also disclosed.

The present invention relates to catalysts for producing hydrogen and / or synthesis gas and methods for obtaining the same. More specifically, the present invention describes nickel, molybdenum, and tungsten-based catalysts for the steam reforming process of natural gas or other hydrocarbon streams (refinery gas, propane, butane, naphtha, or any mixture thereof), which exhibit high resistance to deactivation by coke deposition. According to the present invention, the catalyst has NiMoW as its active phase, in bulk form and / or supported on alumina oxide and other high surface area oxide supports, and may contain other promoters. Furthermore, the present invention teaches the preparation of catalysts in which the NiMoW active phase has high activity for the steam reforming reaction of hydrocarbons.

Embodiments herein relate to a system 100 that for example may be used for calcination of lime mud. The system may comprise an input 102, a media separated heat exchanger 104, an injection arrangement 106, an electrically heated calcination reactor 108, configured to convert input material received by means of said injection arrangement 106 into calcination process products comprising a solid compound in the form of calcium oxide and a gas in the form of carbon dioxide, a heat recovery arrangement 116 configured to receive said calcination process products, to extract heat from said calcination process products and transfer said extracted heat to said input material in said media separated heat exchanger 104 and one or more separators 112, 118 configured to separate said solid compound in the form of calcium oxide and gas in the form of carbon dioxide. Different parts of the system 100 are exemplified in embodiments herein.

Provided herein are a method for producing a hydrocarbon adsorption catalyst includes dealuminated zeolite by heat-treating a zeolite in moisture-containing air at a first temperature to remove a portion of aluminum included in the zeolite, and supporting a metal on a carrier including the zeolite after the heat-treating and a hydrocarbon adsorption catalyst prepared using the same method. The metal-supported support may be additionally heat-treated in moisture-containing air at a second temperature that is higher than the first temperature.

To provide a silica carrier exhibiting high activity and selectivity when a catalytic component is supported thereon. The method for producing the silica carrier includes kneading fumed silica obtained by a combustion method, silica gel obtained by a gel method, and colloidal silica obtained by a sol-gel method or a water glass method, molding the resulting kneaded product, and calcining the resulting molded body. The silica carrier has, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less.

Provided are processes for the formation of electrochemically active materials such as lithiated transition metal oxides that solve prior issues with throughput and calcination. The processes include forming the materials in the presence of a processing additive that includes potassium prior to calcination that produces active materials with increased primary particle grain sizes

Methods of preparing and using alkane dehydrogenation catalysts are provided. The method for making an alkane dehydrogenation catalyst may include mixing a plurality of aluminum hydroxides, a chromium (III) oxide source, and an alkali metal oxide source with an aqueous metal free acid solution to form a moldable mixture. The plurality of aluminum hydroxides may contain from about 60 wt.% to about 99 wt.% of crystalline aluminum trihydroxide and from about 1 wt.% to about 40 wt.% of crystalline aluminum oxide-hydroxide or gelatinous aluminum hydroxide, or combinations thereof. The method may further include extruding the moldable mixture to form extrudates and drying and calcining the extrudates to produce the alkane dehydrogenation catalyst.

The present invention relates to a structured monolithic catalyst for reducing NOx emission in a flue gas, the preparation method and the use thereof. The catalyst comprises: a structured monolithic carrier and a coating of active components, wherein the coating of active components comprises active metal components and a substrate, wherein the active metal components comprise a first metal element, a second metal element, a third metal element and a fourth metal element, wherein the first metal element includes Fe and Co, wherein the weight ratio of Fe and Co is 1 : (0.05-20) on an oxide basis, wherein the second metal element is at least one selected from the group consisting of the metal elements of the Group IA and / or IIA, wherein the third metal element is at least one selected from the group consisting of the non-noble metal elements of the Groups IB to VIIB, and wherein the fourth metal element is at least one selected from the group consisting of the noble metal elements. The catalyst in accordance with the present invention has high catalytic conversion activity for reduced nitrides, is obtainable by a simple method, and when used in a FCC process, can effeciently reduce NOx emission in the incomplete regeneration flue gas.

The present invention relates to a method for producing a catalyst, the method comprising the steps of: a) providing an uncalcined metal-modified porous silica support, wherein the modifier metal is selected from one or more of boron, magnesium, aluminum, zirconium, hafnium, and titanium, and the modifier metal is present in a mononuclear or polynuclear modifier metal moiety; b) optionally removing the solvent or liquid carrier from the modified silica support; c) optionally drying the modified silica support; d) treating the uncalcined metal-modified silica support with a catalytic metal to result in adsorption of the catalytic metal onto the metal-modified silica support; and e) calcining the impregnated silica support of step d). The invention extends to a method for producing a catalyst by providing an uncalcined catalyst intermediate and a porous silica support having isolated silanol groups.

The present disclosure provides a process for preparing a reforming catalyst, said process comprising: (a) impregnating at least one support with at least one promoter metal and at least one active metallic component to obtain a second catalytic precursor; (b) contacting the second catalytic precursor with at least one non-metallic component to obtain a third catalytic precursor; (c) coating the third catalytic precursor with at least one silanizing agent to obtain a coated third catalytic precursor; and (d) drying the coated third catalytic precursor to obtain a dried third catalytic precursor followed by calcination of the dried third catalytic precursor to obtain the reforming catalyst. The present disclosure also provides a reforming catalyst and the process for catalytically reforming a hydrocarbon feed stream by using the reforming catalyst.

Methods of making a hydraulic cement are provided. Aspects of the methods include employing precipitated calcium carbonate (PCC), such as a CO2 sequestering PCC, as a feedstock for lime (CaO) production. Also provided are hydraulic cements and concretes produced by methods of embodiments of the invention, as well as products produced therefrom. In addition, systems for practicing methods of embodiments of the invention are provided.

The invention relates to a system (100) for storing and releasing carbon dioxide, comprising: at least one solids reactor (1); at least one compressor (7, 8) for compressing the carbon-dioxide-containing gas or fluid which is introduced through the inlet (3) of the solids reactor, the compressor (7, 8) being designed such that it adiabatically expands the gas or fluid which has been depleted of carbon dioxide and is discharged from the reactor by means of the outlet (2) of the solids reactor; and at least one counterflow recuperator (6), which is designed for heat exchange between the compressed waste gas or fluid which contains carbon dioxide and the gas or fluid which has been depleted of carbon dioxide. The invention also relates to a solids reactor for storing and releasing carbon dioxide, comprising: a gas-tight or fluid-tight housing which has an interior; at least one inlet for feeding in fluids; and at least one outlet for feeding out gases or fluids, wherein the interior of the housing is filled with at least two different solids, wherein one solid is provided for storing thermal energy, and the other solid is provided for the regenerative storage and release of carbon dioxide. The invention also relates to a method for storing and releasing carbon dioxide.

The invention relates to a rotary kiln continuous granulation device and process, and belongs to the technical field of rotary kiln granulation production. The continuous granulation device comprises a granulation kiln, the granulation kiln comprises a rotary kiln body and a power mechanism, a gear ring is arranged on the periphery of the rotary kiln body and connected with a power gear of the power mechanism in a meshed mode, the two ends of the rotary kiln body are rotationally connected with a feeding cover and a discharging cover respectively, and a rolling device is arranged in the kiln body along the axis. The rolling device comprises a rolling shaft, cross-shaped supporting rods are fixedly connected to the positions, close to the two ends, of the rolling shaft respectively, four pressing rollers are connected between the ends of the two supporting rods, the two ends of each pressing roller are rotationally connected with the supporting rods on the two sides respectively, and the two ends of the rolling shaft are rotationally connected with the feeding cover and the discharging cover through bearings respectively. One end of the rolling shaft penetrates out of the rotary kiln body and is connected with a power mechanism. The continuous granulation device designed by the invention can realize continuous granulation production of materials, and is high in production efficiency and low in energy consumption.