368results about "Heat treatments" patented technology

A method of manufacturing a graphene structure, the graphene structure, and a graphene device including the graphene structure, include depositing a metal layer over a silicon carbide substrate; and performing, at a first temperature, a heat treatment on the silicon carbide substrate over which the metal layer is deposited to form a composite layer and a graphene layer on the silicon carbide substrate. The composite layer includes a metal.

A manufacturing method for a single crystal of calcium fluoride includes the steps of degassing calcium fluoride powder particles to desorb impurities from surfaces of the calcium fluoride powder particles, preprocessing the degassed calcium fluoride powder particles by fusing the degassed calcium fluoride powder particles in a crucible to obtain a preprocessed product, and re-fusing the preprocessed product in a crucible to grow a single crystal of calcium fluoride.

A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350° C. to about 1200° C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof; wherein the nonmetal is selected from the group consisting of SiO₂, Si, B, B₂O₃, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

The present invention is directed to a high surface area, high pore volume porous alumina, comprising: aluminum oxide, optionally, silicon oxide and aluminosilicates, and optionally one or more dopants, said alumina having a specific surface area of from about 100 to about 500 square meters per gram and a total pore volume after calcination at 900° C. for 2 hours of greater than or equal to 1.2 cubic centimeters per gram, wherein less than or equal to 15% of the total pore volume is contributed by pores having a diameter of less than 10 nm.

A system for hydrothermal reaction comprises a heater (3) including a circulating component for fluid flowing across and a heat source for heating fluid, and a reactor (4, 5) including a heat preserving container in communication with the circulating component via pipes. A method for hydrothermal reaction comprises heating the fluid including the reactant and water for hydrothermal reaction, and feeding the heated fluid to the heat preserving container to perform the hydrothermal reaction.

An adsorbent for carbon dioxide may include a mesoporous inorganic oxide having a crystalline halide of an alkali metal or alkaline earth metal supported thereto and a chemical species containing phosphorous (P), sulfur(S), or boron (B) supported thereto.

A method for the oxidative coupling of hydrocarbons, such as the oxidative coupling of methane, includes providing an oxidative catalyst inside a reactor, and carrying out the oxidative coupling reaction under a set of reaction conditions. The oxidative catalyst includes (A) at least one element selected from the group consisting of the Lanthanoid group, Mg, Ca, and the elements of Group 4 of the periodic table (Ti, Zr, and Hf); (B) at least one element selected from the group consisting of the Group 1 elements of Li, Na, K, Rb, Cs, and the elements of Group 3 (including La and Ac) and Groups 5 - 15 of the periodic table; (C) at least one element selected from the group consisting of the Group 1 elements of Li, Na, K, Rb, Cs, and the elements Ca, Sr, and Ba; and (D) oxygen.

Systems and methods of synthesizing nanoparticles on substrates using rapid, high temperature thermal shock. A method involves depositing micro-sized particles or salt precursors on a substrate, and applying a rapid, high temperature thermal pulse or shock to the micro-sized particles or the salt precursors and the substrate to cause the micro-sized particles or the salt precursors to become nanoparticles on the substrate. A system may include a rotatable member that receives a roll of a substrate sheet having micro-sized particles or salt precursors; a motor that rotates the rotatable member so as to unroll consecutive portions of the substrate sheet from the roll; and a thermal energy source that applies a short, high temperature thermal shock to consecutive portions of the substrate sheet that are unrolled from the roll by rotating the first rotatable member. Some systems and methods produce nanoparticles on existing substrate. The nanoparticles may be metallic, ceramic, inorganic, semiconductor, or compound nanoparticles. The substrate may be a carbon-based substrate, a conducting substrate, or a non-conducting substrate. The high temperature thermal shock process may be enabled by electrical Joule heating, microwave heating, thermal radiative heating, plasma heating, or laser heating.

The present invention discloses a delivery equipment for the solid precursor particles, which is applied to the deposition of thin film. The delivery equipment for the solid precursor particles mainly comprises a container, a feeding material inlet, a feeding material tube, a feeding gas inlet, a feeding gas tube, and an output. A plurality of solid precursor particles are stored in the carrier liquid of the container, and then heated to be vapor, removed through the output of the container. The solid precursor particles are prepared by sublimation or grounding and uniformly dispersed in the carrier liquid. The disclosed delivery equipment for the solid precursor particles can reduce the required heating temperature, increase the thermal stability, prolong the used life time, and then increase the using efficiency of the precursors.

The invention provides a microwave heating device and an application thereof, wherein the device comprises a microwave reactor and a microwave generation and transmission device, the microwave generation and transmission device comprises a microwave source, a circulator, a water load, a directional coupler, an automatic tri-dowel regulator and a waveguide according to a microwave transmission sequence, in the waveguide section, a mode of converting a rectangular wave guide into coaxial transmission is adopted, and a probe enters the center of the reactor from the side wall of the microwave reactor for guiding the microwave into the reactor. According to the device, microwaves in the reactor are uniformly distributed; and moreover, the device has good sealing performance, can be practically applied for any reaction which utilizes microwave to heat, such as an application of continuous oil product hydrodesulfurization, technological conditions can be alleviated, the oil product desulfurization degree is effectively improved, and the oil refining economical efficiency is improved.

The present invention relates to a preparation method of a lithium titanium composite oxide doped with a dissimilar metal, and a lithium titanium composite oxide doped with a dissimilar metal prepared thereby, and more particularly, to a preparation method of a lithium titanium composite oxide doped with a dissimilar metal in which sizes of primary particles are finely controlled by doping a dissimilar metal and using a spray-drying method, and a lithium titanium composite oxide doped with a dissimilar metal prepared thereby.

According to the present invention, the preparation method of a lithium titanium composite oxide doped with a dissimilar metal, and the lithium titanium composite oxide doped with a dissimilar metal prepared thereby allow sizes of primary particles to be finely controlled as compared with conventional lithium titanium composite oxide, and inhibit rutile titanium dioxide generation, thereby providing a battery with a high initial charge-discharge efficiency and a high rate capability.

A thermochemical treatment installation includes a reaction chamber, at least one gas inlet, and a gas preheater chamber situated between the gas inlet and the reaction chamber. The preheater chamber has a plurality of perforated distribution trays held spaced apart one above another. The preheater chamber also includes, between at least the facing distribution trays, a plurality of walls defining flow paths for a gas stream between said trays.

Provided are methods of making dehydrogenation catalyst supports containing bayerite and silica. Silica-stabilized alumina powder, prepared by spray drying of bayerite powder, precipitating silica in a bayerite slurry with an acid, or impregnation or co-extrusion of bayerite with sodium silicate solution was found to be a superior catalyst support precursor. Catalysts prepared with these silica containing support materials have higher hydrothermal stability than current CATOFIN TM catalysts. Also provided is a dehydrogenation catalyst comprising Cr2O3, an alkali metal oxide, SiO2 and Al2O3, and methods of using said catalyst to make an olefin and/or dehydrogenate a dehydrogenatable hydrocarbon.

Novel nanosized layered double hydroxide materials and a method of producing the same as well as uses of said material. The novel materials are uniform and have the general formula I

[M²⁺_1-xM³⁺_x(OH)₂][A^n-_x/n.zH₂O]  I

• • wherein
    • M²⁺ is selected from Mg²⁺, Ca²⁺, Mn²⁺, Fe²⁺, Co²⁺, Ni²⁺, and Zn²⁺
    • M³⁺ is selected from Al³⁺, V³⁺, Cr³⁺, Fe³⁺, Co³⁺, Sc³⁺, Ga³⁺, and Y³⁺,
    • A^n- stands for an anion,
    • x stands for a value in the range from 0.2 to 0.33,
    • n is an integer from 1 to 4 and
    • z is an integer from 1 to 10.

The particle size is less than 1 μm. The material can be used in heterogeneous catalysis in organic chemistry and petrochemistry, magnetic materials, pharmaceutical applications, electrode materials, tissue engineering, cosmetics, and dietary supplements.

Disclosed is a lean NOx trap (LNT) catalyst with enhanced NOx storage capacity at low temperature. More particularly, an LNT catalyst with enhanced NOx storage capacity at low temperature and significantly inhibited thermal desorption is prepared by coating a washcoat on a honeycomb-type carrier and drying and baking the same. The washcoat contains a first catalyst powder in which barium (Ba) and a precious metal are supported on a ceria support, and a second catalyst powder in which a precious metal is supported on a magnesium (Mg)-substituted alumina support The LNT catalyst of the present invention is useful as a NOx reducing catalyst for a passenger diesel vehicle.

The invention relates to the technical field of grease processing, particularly to an grease melting stirring system which comprises a liquid grease storage tank, a stirring device, a melting device and a liquid circulation pipe, wherein the melting device comprises a heating layer and a stock bin communicated with the storage tank; the heating layer is arranged on the stock bin; a gap from which melted grease can flow into the stock bin is formed in the heating layer; the melting device further comprises a heat preservation cover; the heat preservation cover is arranged on the stock bin and a heating cavity is formed between the heating layer and the heat preservation cover; one end of the liquid circulation pipe is connected with the storage tank; the other end of the liquid circulation pipe passes through the top of the heat preservation cover to enter the heating cavity; a control valve for controlling liquid to flow and a circulation pump for supplying power for liquid circulation are arranged on the liquid circulation pipe. The invention further provides a grease melting processing method. Compared with the prior art, the grease melting stirring system has the advantages of being simple in structure, convenient to use, high in melting efficiency and convenient to clean.

The present invention relates to an Fe-modified perovskite-type catalyst, a method for preparing same and a method for preparing a synthesis gas by a combined reforming reaction using same. More particularly, it relates to a catalyst for a combined natural gas/steam/carbon dioxide reforming reaction having a perovskite structure with La and Sr introduced at the A site and Ni and Fe introduced at the B site with specific molar ratios and a method for producing a synthesis gas for Fischer-Tropsch synthesis or methanol synthesis using the catalyst by the combined reforming reaction. The catalyst of the present invention exhibits higher carbon dioxide conversion rate, significantly reduced catalyst deactivation caused by carbon deposition and improved long-term catalyst stability and activity, as compared to the existing catalyst for reforming reaction prepared by the impregnation method.

Provided is a catalyst for preparing a syngas by reforming methane wherein a nickel-based catalyst is mixed with a metal oxide catalyst. More particularly, alumina is used as a support and a metal oxide catalyst including magnesia, nickel, vanadium, tungsten, iron, molybdenum or chromium is used to inhibit carbon deposition and maintain or improve catalytic activity.