219 results about "Nitrogen adsorption" patented technology

Provided in the present disclosure are a sodium ion battery, a preparation method for the sodium ion battery, an electrical device and a hard carbon material. The sodium ion battery comprises a negative electrode sheet; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector; the negative electrode film layer comprises a hard carbon material. On the basis of measurement using the nitrogen adsorption method, the hard carbon material comprises a porous structure, and the porous structure comprises pores having a pore size of 2 nm-8 nm; on the basis of measurement using the nitrogen adsorption method, the pore volume of the pores having a pore size of 2 nm-8 nm is 0.0004 cm3 / g-0.0040 cm3 / g.

The invention provides a method for determining the pore diameter lower limit and the effective pore volume ratio of movable fluid. The method comprises the steps that the temperature of each sample under the stratum in-situ condition is calculated according to the ground temperature gradient and the burial depth; correcting the surface tension coefficient of the water by using the calculated temperature; determining an average contact angle of water and shale; calculating capillary force, enabling the capillary force to be equal to reservoir fluid pressure, and calculating the lower limit of the aperture of the movable water; carrying out carbon dioxide adsorption, liquid nitrogen adsorption and mercury injection experiments on the sample to obtain connectivity pore volume-pore size distribution, and calculating effective pore volume in combination with a movable water pore size lower limit; carrying out a low-field nuclear magnetic resonance experiment, calculating the total pore volume of macropores, obtaining the total pore volume of small pores in combination with a carbon dioxide experiment, and finally calculating the total pore volume; and calculating the pore volume ratio of the effective pores by using the pore volume of the effective pores and the total pore volume. According to the method, the evaluation precision of the lower limit of the pore diameter of the shale reservoir movable fluid and the pore volume ratio of the effective pores is effectively improved, and the test cost is reduced.

The problem to be solved by the present disclosure is to provide recovered carbon black that enables the production of a rubber composition that can improve the reinforcing characteristic while having excellent breaking resistance, a rubber composition containing the recovered carbon black, and a tire produced from the rubber composition. The solution is recovered carbon black having a particle size (D90) at which the cumulative volume percentage measured in accordance with JIS K 6217-6:2008 reaches 90% of 310 nm or less, a nitrogen adsorption specific surface area of 50 m2 / g or more and 85 m2 / g or less, and a relative tinting strength measured in accordance with JIS K 6217-5 of 55 or more.

To provide a wiper blade rubber which can suppress curing in low temperature atmosphere.SOLUTION: A wiper blade rubber 10 is formed of a crosslinked rubber composition containing a rubber component and carbon black. A nitrogen adsorption specific surface area of the carbon black is 20 m2 / g or more and 40 m2 / g or less. A content of the carbon black in the crosslinked rubber composition is 15 pts.mass or more and less than 30 pts.mass with respect to 100 pts.mass of the rubber component. When a loss tangent at -20°C of viscoelastic characteristics of the crosslinked rubber composition is represented by tanδ(-20°C), a loss tangent at -25°C thereof is represented by tanδ(-25°C), and a loss tangent at -30°C thereof is represented by tanδ(-30°C), tanδ(-20°C)≤1.0, tanδ(-25°C)≥0.7 and tanδ(-30°C)≥0.6 are satisfied.SELECTED DRAWING: Figure 1

Provided is a titanium oxide powder, wherein the A / BET specific surface area is 2.3×10-5[ms-1 / (m2 / g)] or higher when calculated from the BET specific surface area and the inverse A of the spin-spin relaxation response time T2 measured by performing pulsed NMR on a liquid mixture in which the BET specific surface area measured via the nitrogen adsorption method is at least 80m2 / g and less than 300m2 / g, the anatase content of the crystal phase measured by the powder X-ray diffraction (XRD) method is 90% or more, and the titanium oxide content prepared using ion-exchanged water is 10 mass%.

The present invention addresses the problem of providing a catalyst having high activity in a reaction for hydrogenating an aromatic compound. This problem is solved by a catalyst for hydrogenating an aromatic compound, wherein: the Ni content is in the range of 40-90 mass% in terms of NiO with respect to the total mass of the catalyst; the Si content is in the range of 5-30 mass% in terms of SiO2 with respect to the total mass of the catalyst; the Mg content is in the range of 0.5-20 mass% in terms of MgO with respect to the total mass of the catalyst; the volume (PV1-10) of pores having a diameter in the range of 1-10 nm is 0.2 mL / g or more in a pore distribution obtained by using a nitrogen adsorption method; and the volume PV1-10 accounts for 60% or more of the volume (PV1-60) of pores having a diameter in the range of 1-60 nm.

The present invention provides polypropylene films, vapor-deposited polypropylene films, and laminated films that exhibit excellent scratch resistance on the film surface subjected to vapor deposition or printing processes. [Solution] A polypropylene film 10 comprising at least two layers, a first surface layer 20 and a second surface layer 30, wherein both the first surface layer 20 and the second surface layer 30 contain an antiblocking agent, and satisfying the requirement that the scratch resistance value is 2600 or less when the arithmetic mean roughness of the three-dimensional surface roughness of the first surface layer 20 is SRa1 (μm), the number of peaks with a peak height of 1 μm or more in the three-dimensional surface roughness of the second surface layer 30 is SPc2 (number), and the pore volume of the antiblocking agent contained in the second surface layer 30, determined by nitrogen adsorption method, is V2 (ml / g).

To provide a rubber composition to be a raw material of a vulcanized rubber excellent in steering stability and wet grip performance when used as a rubber part of a pneumatic tire, especially a pneumatic tire for motor sports.SOLUTION: A rubber composition comprising 100 parts by mass of a rubber ingredient containing at least a diene rubber, 0.1 to 10 parts by mass of a cinnamic acid compound having a hydroxyl or methoxy group-substituted aromatic ring, and 40 to 140 parts by mass of carbon black having a nitrogen-adsorption specific surface area of 140 to 250m2 / g. The cinnamic acid compound is a naturally occurring compound and is preferably at least one of 3, 4-dihydroxycinnamic acid and 3, 4-dimethoxycinnamic acid.SELECTED DRAWING: None

A kind of multilayer adsorption tower oxygen generator, including adsorption tower tank body and connecting pipeline, multiple molecular sieve trays are arranged in vertical direction in adsorption tower tank body, molecular sieve tray is equipped with multiple vertical direction extension micro air flow channel, the micro air flow channel of adjacent molecular sieve tray is aligned, and molecular sieve particle is arranged in the upper end and lower end of micro air flow channel.Multiple molecular sieve trays can form multilayer structure, and the multilayer adsorption tower oxygen generator can be adjusted after a certain period of use, for example, the lowermost molecular sieve tray is moved to the upper side, or the uppermost molecular sieve tray is moved to the lowermost end, effectively avoiding the problem of reducing nitrogen adsorption efficiency when the lower molecular sieve fails.This structure design makes a large amount of nitrogen be adsorbed before entering the adsorption tower, reduces the gas flow resistance, significantly improves the nitrogen adsorption capacity, thereby solving the technical problems that the molecular sieve will fail in the prior art, and the oxygen concentration decreases with the change of use time.

The invention belongs to the technical field of adsorption type nitrogen generation, particularly relates to PSA (Pressure Swing Adsorption) type nitrogen generation equipment and a method thereof, and aims to solve the problems that in the prior art, a single filter cavity structure is mostly adopted, when a filter screen is blocked by impurities and needs to be replaced or cleaned, shutdown operation must be performed, and the continuous gas generation capacity of the equipment is seriously influenced; in order to solve the problems that in the prior art, due to the fact that air enters a filter cavity in a directional and concentrated mode, airflow easily washes the local area of a filter screen, the local area of the filter screen is blocked rapidly, and the overall utilization rate and the service life of the filter screen are reduced, the following scheme is provided that the device comprises a base, and supporting legs are fixedly installed at the four corners of the bottom of the base; a filter box, a nitrogen-making adsorption separation tank and a nitrogen-making storage tank are fixedly mounted at the top of the base. According to the invention, online non-stop switching of a filter cavity is realized; the integral utilization rate of the filter screen is improved by utilizing a uniform ventilation mechanism for reciprocating swinging of the splitter plate; the structure is simple, and the equipment failure rate and the maintenance cost are greatly reduced.

The present invention provides: a carbon carrier which enables the achievement of effective maintenance of the performance of a metal-loaded catalyst; a metal-loaded catalyst which is capable of effectively maintaining the performance; an electrode; and a battery. The carbon carrier is for supporting catalyst metal particles. In a log differential pore volume distribution obtained by the DH method from the nitrogen adsorption isotherm at a temperature of 77K, the most frequent diameter, which is the pore diameter that gives the maximum value of log differential pore volume within a pore diameter range of more than 0 nm and not more than 100 nm, is less than 2.0 nm, and the log differential pore volume at the most frequent diameter is 1.70 cm3 / g or less.

This silica aerogel powder used for a heat insulation material for a battery pack has a specific surface area of 550 m2 / g or greater as measured on the basis of an adsorption isotherm obtained if the silica aerogel powder is measured using an adsorbed nitrogen amount measurement method, has a pore volume of 3.5-5.0 mL / g when the relative pressure is 0.99, and satisfies the following conditions (i) and (ii), where the pore volume with the relative pressure being 0.93 is a [mL / g], the pore volume with the relative pressure being 0.965 is b [mL / g], and the pore volume with the relative pressure being 0.99 is c [mL / g]. (i): 0 ≤ (a / c×100) ≤ 50, (ii): 50 ≤ (b / c×100) < 100

The present invention provides a full-aperture pore structure characterization method and device driven by multidimensional data, the method comprising: obtaining a target tight reservoir rock sample; subjecting the target tight reservoir rock sample to brine saturation treatment and a first nuclear magnetic resonance measurement to obtain the brine-saturated rock sample and the transverse relaxation time under brine saturation; subjecting the brine-saturated rock sample to high-pressure mercury injection and nitrogen adsorption to obtain high-pressure mercury injection and gas adsorption experimental data; calibrating the transverse relaxation time under brine saturation based on a full-aperture cumulative pore volume frequency distribution curve to obtain a transverse relaxation time pore size distribution curve based on nuclear magnetic resonance; subjecting the target tight reservoir rock sample to constant-rate mercury injection treatment to obtain a pore size distribution curve based on constant-rate mercury injection; determining the overlapping position of the transverse relaxation time pore size distribution curve based on nuclear magnetic resonance and the pore size distribution curve based on constant-rate mercury injection, and using the overlapping position as a joining point; and determining the full-aperture distribution range of the target tight reservoir.

The application discloses a lithium type X molecular sieve adsorbent and a preparation method thereof, and belongs to the technical field of adsorption separation. The preparation method of the lithium type X molecular sieve adsorbent comprises two steps of preparing a low-silicon aluminum X molecular sieve and ion exchange. The lithium type X molecular sieve adsorbent prepared by the method has a lithium ion exchange degree of 97.9-99.1%, a molar ratio of SiO2 and Al2O3 of 2.01-2.10, a nitrogen adsorption amount of 32.62-34.94 mL / g, an oxygen adsorption amount of 2.40-2.75 mL / g, and a nitrogen-oxygen separation coefficient of 11.86-14.56.

The preparation method comprises the following steps: preparing functionalized silicon dioxide nanospheres by a template method, grafting the functionalized silicon dioxide nanospheres to light and thin COF, carrying out a hydrothermal reaction on ferrous nitrate and the nanospheres to obtain hollow ferrous silicate (FeSiO3 (at) COF) nanospheres, and carrying out high-temperature crystallization to obtain the FeSiO3 (at) COF hollow composite nanospheres. And replacing ferrous iron with equimolar ferric iron to obtain the hollow ferrous silicate Fe2 (SiO3) 3 (at) COF composite nanosphere. A composite structure of a sample is characterized by means of a scanning electron microscope (SEM), a transmission electron microscope (TEM), nitrogen adsorption-desorption (BET) and the like, electromagnetic parameters of Fe2 (SiO3) 3 (at) COF and FeSiO3 (at) COF coaxial ring samples are tested, and experimental results show that the highest dielectric constant value of the FeSiO3 (at) COF coaxial ring samples is 2.78, and the highest dielectric loss value of the FeSiO3 (at) COF coaxial ring samples is 0.15.

Halloysite powder is disclosed. The halloysite powder includes a granule in which halloysite including halloysite nanotubes and titanium oxide are aggregated. The granule includes a first pore derived from a tube hole of the halloysite nanotubes, and a second pore different from the first pore. The halloysite powder may have a differential pore distribution determined from a nitrogen adsorption isotherm by BJH method exhibiting two or more pore size peaks.

What is provided is a titanium oxide powder having a BET specific surface area of 300 m2 / g to 480 m2 / g as measured through a nitrogen adsorption method, an anatase content of a crystalline phase of 90% or more as measured through XRD measurement, and a spin-spin relaxation time T2 of 46 ms to 103 ms obtained by performing pulsed NMR measurement of a 5 mass % suspension prepared using ion exchange water.

Provided is a copper oxide, for which the specific surface area measured by a nitrogen adsorption method is 2.9 m2 / g or more, and the tap density measured in accordance with JIS Z 2512: 2012 is less than 1.1 g / cm3.

The present invention relates to an alkali metal carbonate, more particularly to a natural alkali metal carbonate having lowered bulk density. The present inventors have found that a natural alkali metal carbonate having a bulk density less than 1000 Kg / m3 and an absorption pre size of more than 10 nanometers as measured using BET nitrogen absorption method provides the benefits of improved dispersibility, enhanced liquid carrying capacity.

The invention provides an ammonium acetate modified Li-LSX molecular sieve as well as a preparation method and application thereof. The preparation method of the ammonium acetate modified Li-LSX molecular sieve comprises the following steps: activating an LSX molecular sieve, immersing the activated LSX molecular sieve into an ammonium acetate solution, heating in a water bath, and calcining to obtain a crude product; and mixing the crude product with a lithium source solution, and carrying out lithium ion exchange at high temperature. The activated LSX molecular sieve is modified by using the ammonium acetate solution, so that the exchange rate of lithium ions to sodium ions can be remarkably improved, the accuracy of an SIII site of Li in a molecular sieve framework is ensured, and the nitrogen adsorption efficiency is improved; meanwhile, the method is simple in process and convenient to operate, and the production cost of the LSX molecular sieve with the high lithium ion exchange rate is remarkably reduced.

The invention discloses a metal organic framework material for adsorbing and separating methane and nitrogen in wharf oil gas as well as a preparation method and application of the metal organic framework material. The metal organic framework material is a modified Al-fumarate material which is obtained by performing organic liquid post-treatment on a framework material formed by complexing an aluminum metal node and fumaric acid. According to the method for modifying the Al-fumarate metal organic framework material based on organic matter aftertreatment, Al-fumarate material basic powder is prepared through a simple hydrothermal process, pretreatment is performed through vacuum high-temperature degassing, then aftertreatment modification is performed through organic liquid, and the high-performance methane nitrogen adsorption and separation material is prepared. And optimization of methane adsorption capacity and methane nitrogen selectivity is realized. The material can be applied to methane adsorption and recovery in the wharf oil gas treatment process, has the technical advantages of simple preparation conditions, easily available raw materials and excellent adsorption performance, and overcomes the bottleneck of the existing material in methane adsorption.

The present application discloses a shale nuclear magnetic resonance pore size calibration method, device, equipment, and medium, relating to the technical field of shale reservoir pore characterization. The method comprises the following steps: preparing a shale core sample into a nuclear magnetic resonance column sample, drying the nuclear magnetic column sample under preset high temperature conditions, measuring the original nuclear magnetic resonance spectrum of the processed column sample, saturating the processed column sample with water under preset high pressure conditions, and measuring the target nuclear magnetic resonance spectrum of the saturated column sample; obtaining a shale pore nuclear magnetic resonance curve, drying the saturated column sample under preset high temperature conditions, performing a nitrogen adsorption experiment on the obtained powder sample, and calculating a nitrogen adsorption pore size distribution curve of the powder sample; obtaining a nuclear magnetic resonance porosity component curve and a nitrogen adsorption porosity component curve; performing nonlinear fitting on the curves to determine the corresponding relationship between nuclear magnetic resonance relaxation time and nitrogen pore size, and calibrating the shale nuclear magnetic resonance pore size based on the corresponding relationship. This method achieves pore size calibration.

The purpose of the present invention is to provide an anatase-type titanium oxide powder having a high specific surface area and high dispersibility, and a method for producing the same. Provided is a titanium oxide powder having a BET specific surface area of 300-480 m2 / g (inclusive) as measured using a nitrogen adsorption method, and an anatase content of a crystal phase of 90% or more as measured by XRD measurement, the spin-spin relaxation time (T2) obtained by measuring a 5 mass% suspension produced using ion-exchanged water using pulsed NMR is 46-103 ms (inclusive).

A wiper blade rubber (10) is formed of a crosslinked rubber composition containing a rubber component and carbon black. The nitrogen adsorption specific surface area of the carbon black is 20 m2 / g or more and 40 m2 / g or less. The content of the carbon black in the crosslinked rubber composition is 15 parts by mass or more and less than 30 parts by mass with respect to 100 parts by mass of the rubber component. When the loss tangents of the viscoelastic characteristics of the crosslinked rubber composition at -20°C, -25°C, and -30°C are defined as tanδ (-20°C), tanδ (-25°C), and tanδ (-30°C), respectively, tanδ (-20°C) ≤ 1.0, tanδ (-25°C) ≥ 0.7, and tanδ (-30°C) ≥ 0.6 are satisfied.

According to an embodiment, an electrode is provided, comprising a current collector and an active material layer located on the current collector. The active material layer contains an active material and a conductive agent. The active material comprises a lithium nickel cobalt manganese composite oxide. The specific surface area S of the active material layer obtained by nitrogen adsorption is... BET The specific surface area S of the micropores containing the active material layer obtained by mercury intrusion porosimetry Hg Satisfying 0.8 BET / S Hg The relationship is <2.0. The volume resistivity R of the layer containing the active material is... V The interfacial resistance R at the interface between the current collector and the layer containing the active material is below 10 Ω·cm. I 0.5Ω·cm 2 Below. Volume resistivity R V With interface resistance R I The ratio of R V / R I 3cm ‑1 Above and 20cm ‑1 the following.​

To provide activated carbon and activated carbon filter bodies that exhibit superior chloroform removal performance. [Solution] The BET specific surface area calculated from nitrogen adsorption isotherms using the BET method is 900-1200 m². 2 The value is / g, and the pore volume of pores in the range of 0.25-0.65 nm, calculated by GCMC method from carbon dioxide adsorption isotherms, is 0.28 cm³. 3 The pore volume of pores larger than 2 nm, calculated by NLDFT method from nitrogen adsorption isotherms, is 0.0135 cm³ or more. 3 The pore volume of pores in the range of 0.37-0.65 nm, calculated by NLDFT method from nitrogen adsorption isotherms, is 0.09 cm³. 3 Activated carbon having a surface oxide content of 0.160 meq / g or less, and a surface oxide content of 0.160 meq / g or less.

Another object of the present invention is to provide a rubber composition for a fender with which a fender having excellent tear strength and buckling properties can be obtained, and a fender produced using the rubber composition for a fender.SOLUTION: The rubber composition for fenders of the present invention comprises a base rubber comprising a natural rubber and a styrene-butadiene rubber, and carbon black, wherein the amount of the carbon black is 100g or more and 70g or less per 80g of the base rubber, the total DBP absorption of the carbon black represented by the product of the amount (g) of the carbon black and the DBP (dibutyl phthalate) absorption is 70cm3 or less, and the carbon black has a nitrogen-adsorption specific surface area of 70m2 / g to 120m2 / g and a DBP absorption of 90cm3 / 100g or less.SELECTED DRAWING: None

The invention discloses a biogas liquefaction system with an anti-ice-blockage desublimation and decarburization mechanism and a biogas liquefaction method. The biogas liquefaction system comprises a raw material gas pretreatment mechanism, a VPSA nitrogen removal mechanism, a desublimation and decarburization mechanism, a biogas liquefaction mechanism and a cascade refrigeration mechanism, the VPSA nitrogen removal mechanism comprises two nitrogen adsorption towers, and the two nitrogen adsorption towers can alternately perform adsorption and regeneration; the desublimation and decarbonization mechanism comprises two desublimation separators, a cold pipe and a heat pipe are arranged in each desublimation separator, and the two desublimation separators can alternately perform desublimation and carbon dioxide crystallization and sublimation and carbon dioxide removal regeneration. The method has the advantages that the carbon dioxide is effectively separated from the biogas in a crystal form, so that the problem of ice crystal blockage caused by the carbon dioxide, water vapor or impurities at low temperature can be prevented, and the whole decarburization and liquefaction process can be stably and continuously operated for a long time.

The present invention relates to a process for treating ammonia-nitrogen-containing wastewater by utilizing a magnetic separation wastewater system. The magnetic separation wastewater system comprises a magnetic separation unit and is characterized in that the magnetic separation wastewater system further comprises an adsorption reaction unit, wherein the adsorption reaction unit comprises an adsorption reaction box, the adsorption reaction box is provided with an adsorption cavity, and the adsorption cavity is connected to the downstream magnetic separation unit. The process comprises: step S1, using a magnetic composite material with an ammonia-nitrogen adsorption function as a magnetic medium, inputting the magnetic medium and the wastewater together into the adsorption reaction unit, and achieving mixing of the magnetic medium and the wastewater in the adsorption cavity and completing adsorption of soluble ammonia-nitrogen in the wastewater; step S2, continuing to input the wastewater into the magnetic separation unit, continuing to treat the wastewater by utilizing a magnetic separation process, and at least removing insoluble pollutants in the wastewater; the process can simultaneously remove soluble ammonia-nitrogen and insoluble pollutants in the wastewater through a single magnetic separation process.

Rubber composition for tires, the rubber composition comprising: 100 parts by mass of a diene rubber containing a styrene-butadiene copolymer rubber having a styrene content of 30% by mass or more; 50 to 200 parts by mass of carbon black having a nitrogen adsorption surface area N2SA of 100 to 500 m2 / g and N2SA / IA, which is a ratio of the nitrogen adsorption surface area N2SA (unit: m2 / g) to an iodine adsorption number IA (unit: mg / g), of 0.90 to 1.03; 5 to 50 parts by mass of a styrolated phenol compound represented by the structural formula (1); and 20 to 90 parts by mass of a sticky resin; wherein a mixed quantity of the styrofoamed phenol compound represents 15% by mass or more based on a quantity of the sticky resin: wherein n is 2 or 3;wherein the sticky resin is one or more types selected from the group consisting of a C9 petroleum resin, a phenolic resin, a coumaron indene resin, a terpene resin, a styrene resin, an acrylic resin, a rosin resin and a dicyclopentadiene resin.