12results about How to "Low activation temperature" patented technology

The present invention provides a kind of low-temperature activated activated carbon, preparation method and application, which belong to the field of activated carbon nanomaterials. The raw materials used are common and easily available industrial-grade products, the equipment is simple, the preparation process is simple, the repeatability is strong, and it is conducive to industrial large-scale production. The present invention provides a kind of low-temperature activated activated carbon, the activation temperature is relatively low, and the corrosion of the activator to the equipment is relatively small, which not only further reduces the cost of the product, but also is human and environmentally friendly, and can be widely used in water treatment, chemical catalysts and carriers, solvent recovery, oil decolorization, air purification and other fields. Compared with the existing commercially available activated carbon, the product prepared by the present invention has a large specific surface area, a more developed pore structure, and a lower iron content in the product. In addition, the product of the present invention can be used in the fields of heavy metal ion adsorption in aqueous solution, automobile exhaust purification, impurity removal of printing ink, gas separation, supercapacitor electrode materials and other electrochemical energy storage materials.

This invention discloses the application of a carbon-modified noble metal catalyst in the low-temperature combustion of propane or mixed alkanes. The carbon-modified noble metal catalyst is prepared by adding sodium hydroxide solution dropwise to a cerium salt solution, mixing, and reacting to obtain a cerium dioxide support. The cerium dioxide support is then impregnated in an equal volume of noble metal salt solution, dried, and calcined. The calcined product and glucose are added to deionized water, mixed, and subjected to a hydrothermal reaction, followed by drying and calcination to obtain the final product. In this invention, carbon species exist in the form of doping or interstitial filling, inducing lattice distortion and a high concentration of surface oxygen vacancies in the support, significantly improving the mobility of lattice oxygen and the reactivity. Simultaneously, the interfacial carbon species optimize the microelectronic environment of the active center through strong electron interactions, maintaining the low valence state of Ru and the metallic states of Pt and Pd. This catalyst effectively avoids the shielding effect of the carbon layer and exhibits excellent catalytic combustion activity and stability for propane and mixed alkanes at low temperatures.

This invention discloses a method for thermal activation of coal gangue. Using coal gangue and an activating admixture as raw materials, the method involves sequential crushing, mixing and mechanical activation, homogenization, molding, drying, calcination and thermal activation, cooling, and grinding to prepare active powder. This invention uses coal gangue as the main raw material. By adding an activating admixture, the thermal activation temperature of the coal gangue is reduced to below 1000℃, significantly stimulating its activity. Simultaneously, combined with mechanical activation, unsaturated residual bonds are formed in the quartz minerals within the coal gangue, producing active silica, further stimulating the activity of the coal gangue and increasing its activation rate. The prepared active powder exhibits a pozzolanic activity of over 75%, achieving the goal of "waste treatment" and reducing costs. This active powder can be directly added as a mineral admixture during concrete preparation, showing promising application prospects.

An automatic continuous bonding system comprising: a first roller for controlling the speed and tension of an adhesive tape comprising a styrene-ethylene-butylene-styrene (SEBS) block copolymer mixed with 5 wt% to 20 wt% of aromatic polyester thermoplastic polyurethane (TPU); the second roller is used for controlling the speed and tension of the fabric; and a heated air nozzle that generates heated air that melts the adhesive tape onto a fabric passing between the first roller and the second roller.

The invention discloses an ultralow-temperature manganese-based SCR (Selective Catalytic Reduction) denitration catalyst and a preparation method thereof. The SCR catalyst comprises manganese oxide, zirconium oxide and tin oxide, in the catalyst finished product, the content of ZrO2 is 26-32 mol%, the content of SnO2 is 13-16 mol%, and the balance is MnO2 in terms of the total content of metal oxides being 100 mol%; by accurately controlling the contents of manganese oxide, zirconium oxide and tin oxide and the addition amount of cetyltrimethylammonium bromide (CTAB), the pore structure of the SCR catalyst is optimized, the activity and selectivity of the catalyst are improved, the performance of the catalyst is improved, and the catalyst can keep higher denitration efficiency under different working conditions; the conversion rate of the ultralow-temperature SCR catalyst to NO reaches 95% or above under the conditions that the reaction space velocity is 100,000 h <-1 > and the temperature is 80 DEG C, and the conversion rate is maintained at a high level for a long time.

The present invention discloses a production method of a multifunctional activated carbon catalyst, comprising: adding activated carbon powder, inorganic binder, and active component into a reaction tank in proportion for hydrothermal reaction, and adjusting pH with dilute phosphoric acid during the reaction; pumping the mixed slurry to a dehydrator, dehydrating after the feed is full, and unloading after dehydration to obtain a mixed mud material; kneading the mixed mud material, and conveying the discharged material to a cylindrical extruder for extrusion molding to obtain a crude columnar mud material; conveying the crude columnar mud material to a vacuum cylindrical extruder for extrusion molding to obtain a refined columnar mud material; conveying the refined columnar mud material to an extruder equipped with a honeycomb mold for extrusion molding and cutting, and gradually drying the honeycomb molded wet material to obtain a honeycomb dry material; the honeycomb dry material is put into a sealed oxygen-deficient high-temperature furnace for activation, and a honeycomb activated carbon catalyst is obtained after cooling. The production method provided by the present invention has no VOC emissions, and the produced activated carbon catalyst has good strength and catalytic performance, and is suitable for promotion and application.

The invention relates to the field of water treatment materials, and particularly discloses a porous carbon-carbon composite adsorption material prepared on the basis of semi-coke wastewater recovered fractionated phenol extract and gasified slag as well as a preparation method and application of the porous carbon-carbon composite adsorption material. The preparation method comprises the following steps: taking pretreated gasified slag prepared by pickling and modifying the gasified slag as a reinforcement matrix; the method comprises the following steps: mixing a fractionated phenol purified product recovered from semi-coke wastewater with an organic binder, phosphoric acid and a solvent to prepare a precursor solution; the invention discloses a preparation method of a porous carbon-carbon composite adsorption material, and the porous carbon-carbon composite adsorption material prepared by the method and application of the porous carbon-carbon composite adsorption material in the field of water treatment are prepared by soaking a reinforcement matrix in a precursor solution and heating and carbonizing. According to the invention, two industrial wastes, namely the gasified slag and the semi-coke wastewater recycled material, are used as main materials and are subjected to pore forming in a high-temperature carbonization process at the same time, so that the prepared adsorption material has excellent decoloration and COD removal performance, and meanwhile, high-value resource reutilization of the wastes is realized.

The present application relates to a kind of porous carbon material containing alkali metal element and its preparation method.The preparation method includes: (1) carbon material powder and transition metal salt solution are mixed, stirring, dry and placed in inert atmosphere high-temperature treatment, and the carbon material loaded with transition metal particles is prepared;(2) the carbon material loaded with transition metal particles obtained is mixed with alkali metal-containing basic substance, stirring, drying, with inert gas as carrier gas, and after being calcined by reaction gas, in-situ generation of alkali metal element on the surface or interlayer of the carbon material loaded with transition metal particles;(3) the carbon material obtained in step (2) is washed by water, and treated by oxidizing agent to obtain the porous carbon material containing alkali metal element.

The present invention discloses a porous flocculent carbon material based on mixed vinasse, which uses vinasse from solid fermentation and vinasse from semi-solid fermentation as raw materials, forms a carbon precursor through low-temperature pre-carbonization, and then directly mixes and calcines the carbon precursor and an alkaline substance to obtain a porous carbon material based on mixed vinasse. The obtained material is porous flocculent and has a specific surface area in the range of 1000-4000 m 2 g ‑1 . The lees used as raw materials must be a mixture of solid-state fermented lees and semi-solid-state fermented lees. The solid-state fermented lees are sweet potato lees or glutinous rice lees, and the semi-solid-state fermented lees are rice lees or sorghum lees. The preparation method comprises the following steps: 1. Preparation of carbon precursor; 2. Preparation of porous carbon material based on mixed lees. As a supercapacitor electrode material, when the current density is 1 A g ‑1 The specific capacitance ranges from 180 to 490 F g ‑1 .

The application discloses a porous material, comprising a porous framework, which is formed by mutual adhesion of spherical or non-spherical powder particles in different broken states. The application also discloses a preparation device of the porous material, comprising a melting mechanism, an atomization mechanism and an atomization chamber which are sequentially connected in a top-down manner, wherein a deposition base is arranged in the atomization chamber, and an atomization gas outlet of the atomization mechanism is located directly above the deposition base. The porous blank with high purity, low oxygen content, high porosity and fast solidification structure can be prepared by the device. The application also discloses a preparation method of the porous material, which comprises sequentially melting, atomization deposition, sintering and machining of raw materials, so that the risk of material pollution is reduced, and the composition uniformity, porous performance and mechanical performance of the porous material are ensured.

The invention discloses a biochar purification process, and relates to the technical field of biochar preparation, biochar raw materials are screened, impurity particles with the particle size larger than 50 meshes are removed, and the moisture content of the screened raw materials is controlled to be smaller than or equal to 15%; putting the pretreated raw material into a nitric acid solution with the concentration of 0.1-0.5 mol / L, stirring and dipping at 50-70 DEG C for 1-3 hours, and then washing with deionized water until the raw material is neutral; alkali washing treatment: dipping the raw material subjected to acid washing and drying in a potassium hydroxide solution with the concentration of 0.2-0.6 mol / L, stirring and dipping at 40-60 DEG C for 2-4 hours, and washing with deionized water again until the raw material is neutral; pyrolyzing and purifying; physical screening; and chemical activation. Compared with the prior art, the invention has the advantages of optimized graded pore structure, high purity, low ash content, improved process stability, energy saving, consumption reduction and environmental protection.

The invention relates to the technical field of vacuum, in particular to a TiZrVAl alloy getter, a preparation method and a vacuum tube. The TiZrVAl alloy getter element provided by the invention is an integrally formed part prepared from the following metal powder in atomic percent: 25 to 35 percent of Ti, 25 to 35 percent of Zr, 25 to 35 percent of V and 10 to 25 percent of Al, and the total atomic percent is 100 percent; a porous air suction structure is arranged on the surface of the TiZrVAl alloy getter element. The getter element with the specific porous structure is prepared by introducing the Al element into the TiZrV alloy and combining the 3D printing technology, the activation temperature of the getter is remarkably reduced, meanwhile, the pumping speed and the suction capacity are greatly improved, and the service life is greatly prolonged.