135 results about "Nitrogen adsorption" patented technology

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.

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 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.

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.

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.

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.

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.

A rubber composition for use in a vibration-damping rubber laminate, and a vibration-damping rubber laminate, are provided, exhibiting excellent inhibition of hardening phenomena. The rubber composition for use in a vibration-damping rubber laminate comprises the following components (A) to (C), wherein, relative to 100 parts by weight of component (A), the content of component (B) is 10 to 30 parts by weight: (A) at least one of isoprene rubber and butadiene rubber; (B) a plasticizer with a molecular weight of 300 to 900; and (C) a DBP with an oil absorption capacity of 100 ml / 100 g or more, an iodine adsorption capacity of 150 mg / g or more, and a nitrogen adsorption specific surface area of ​​140 m². 2 / g or more of carbon black.

To provide a carbon carrier which achieves effective maintenance of performance of a metal-supported catalyst, and to provide a metal-supported catalyst, an electrode and a battery in which performance is effectively maintained.SOLUTION: Wherein a volume of pores having pore diameters in a range of more than 77K and not more than 0nm, which is obtained by a DH method from a nitrogen-adsorption isotherm at a temperature of 100nm, is 1. 10cm3 / g or less, the ratio of the differential pore volume (cm3 / (g·nm)) at the most frequent diameter, which is the pore diameter that gives the maximum differential pore volume within the range of pore diameters exceeding 0 nm and 100 nm or less in the differential pore volume distribution obtained from the nitrogen adsorption isotherm by the DH method, to the volume (cm3 / g) of pores within the range of pore diameters exceeding 0 nm and 100 nm or less is 0.31 nm-1 or greater.SELECTED DRAWING: None

The present invention provides a catalyst support, a catalyst, and a method for manufacturing the catalyst support, which can be used even in harsh thermal environments and have improved heat resistance. [Solution] A catalyst support comprising at least one metal (M) element selected from the group consisting of aluminum, zirconium, and lanthanide elements, and mesoporous silica, wherein the mesoporous silica has one or more peaks in the pore size distribution curve obtained by analyzing the adsorption side isotherm of the nitrogen adsorption isotherm by the DH method, in the range of pore size between 1 nm and 5 nm and between 10 nm and 50 nm, and the molar ratio (M / SiO2) of the molar amount of the metal (M) element relative to the molar amount of SiO2 in the mesoporous silica is in the range of 0.01 mol% to 15.0 mol%.

The present disclosure relates to a process for preparing sulfide solid material particles comprising at least the elements Li, P, S and X, the process comprising the steps of: a) providing a lithium sulfide (Li2S) powder, the Li2S powder has a D50 value ranging from 20 m to 500 m as measured by laser diffraction in para-xylene, a specific surface area equal to or greater than 5 m / g as measured by nitrogen adsorption according to the Brunauo-Emitter-Teller (BET) method, b) reacting the Li2S powder of step a) with at least P2S5 and LiX to obtain sulfide solid material particles containing Li, P, S and X; wherein X is selected from the list consisting of F, Cl, I, Br, CN, NC, OCN, NCO, SCN, NCS, and N3, or a combination thereof. The invention also relates to the particles obtained by said method and to the use thereof for producing an electrode, an electrolyte layer or a separator for an electrode.

The invention belongs to the technical field of shale oil and gas development, and discloses a shale oil-gas-bearing potential multi-parameter collaborative evaluation method. The method integrates six experimental technologies of nitrogen adsorption, carbon dioxide adsorption, carbon and oxygen isotope, rock pyrolysis and XRD total rock / clay analysis, and comprises the core steps of obtaining multi-dimensional data such as a pore structure, mineral composition, organic matter characteristics, an isotope ratio and the like after standardized pretreatment of a shale sample, and performing parameter correction, weight distribution and collaborative modeling to obtain a shale sample. And quantifying the oil-gas potential index and grading. The method solves the problem that traditional single parameter evaluation is insufficient in accuracy, data are comprehensive and reliable, and key technical support is provided for shale oil and gas exploration and development and reservoir evaluation.

The present invention addresses the problem of providing: a coating composition using silica particles in which aluminum atoms are bonded to the surfaces of the silica particles at a specific ratio in terms of Al2O3; a laminated substrate using the coating composition; and a method for producing the laminated substrate. [Solution] A silica particle to be added to a coating composition, the silica particle containing aluminum atoms in which aluminosilicate sites are formed on the silica particle, the aluminum atoms being bonded at a ratio of 120-50000 ppm / SiO2 per 1 g of SiO2 of the silica particle in terms of Al2O3, the aluminum atoms being present in the entire silica particle, and the silica particle containing aluminum atoms having aluminosilicate sites formed on the aluminosilicate sites being bonded at a ratio of 120-50000 ppm / SiO2 per 1 g of SiO2 of the silica particle in terms of Al2O3. The amount of aluminum atoms present in the entire silica particles is measured by a dissolution method by treating the silica particles with an aqueous hydrofluoric acid solution. The ratio (specific surface area (C) measured by the BET method (nitrogen adsorption method)) / (specific surface area (D) converted by a transmission electron microscope) of the silica particles is 1.00-5.00.

The invention relates to the technical field of fertilizers, in particular to a hydrothermal carbon-sodium alginate slow-release fertilizer based on a subcritical conversion technology and a preparation method of the hydrothermal carbon-sodium alginate slow-release fertilizer. Sludge-based hydrothermal carbon is added into a urea-sodium alginate mixed solution, a three-dimensional gel network is formed through crosslinking of sodium alginate and calcium ions, a urea component is embedded into the network in the gelation process, and the slow-release fertilizer with nitrogen adsorption-desorption behavior dual regulation and control is obtained. Hydrocarbon is introduced into a sodium alginate gel system, the structural characteristics of gel can be improved by utilizing the pore structure, the adsorption capacity and the mechanical strength of the sodium alginate gel system, and the adsorption and retention of nitrogen are enhanced, so that the release process is further regulated and controlled, the nitrogen loss is reduced, and the overall slow release effect and the crop nutrient utilization efficiency are improved.

A copper powder in which the DBET / D50, which is obtained from the particle diameter D50 of the copper powder when the cumulative frequency is 50% in a volume-based cumulative frequency distribution curve measured using a laser diffraction / scattering particle size distribution measurement device, and the particle diameter DBET, is 0.70-1.20, inclusive, and the DBET / D50 is the particle diameter D50 when the cumulative frequency is 50% in the volume-based cumulative frequency distribution curve measured using a laser diffraction / scattering particle size distribution measurement device. The particle diameter DBET is a particle diameter calculated from a specific surface area s of the copper powder by a nitrogen adsorption method, and a coefficient of variation (SD / MV) obtained from a volume average particle diameter MV and a standard deviation SD of a particle size distribution of the copper powder measured by a laser diffraction / scattering particle size distribution measurement method is 0.50 or less.

The application discloses a porous molecular sieve material, which has at least three concave arcs and at least two adsorption-desorption hysteresis loops in a low-temperature nitrogen adsorption isotherm curve. A preparation method of the porous molecular sieve material comprises the following steps: mixing a molecular sieve containing silicon as a first skeleton element with polyquaternary ammonium base, water and optionally added small-molecule nitrogen-containing basic compounds, treating the mixture at a temperature of 100-200 DEG C for 1-72 hours, and separating at least part of solid products from the treatment product and drying and calcining the solid products.

This invention discloses a method for preparing a boron-doped self-supporting three-dimensional non-metallic carbon-based catalytic electrode and its application in electrocatalytic nitrogen reduction. Using starch, boric acid, and sodium carboxymethyl cellulose as raw materials, the boron-doped self-supporting three-dimensional non-metallic carbon-based catalytic electrode is obtained through freeze-drying and carbonization, or freeze-drying, pre-carbonization, and carbonization. This electrode can be used as a catalytic cathode for the electrochemical reduction of nitrogen. The product exhibits rich morphology and porosity. Boron doping intensifies the hybridization of the electronic structure and increases defects. This change effectively regulates nitrogen adsorption to promote the entire electrochemical reduction of nitrogen, resulting in an ammonia yield of 10 μg·h⁻¹. ‑1 ·mg ‑1 The invention eliminates the need for complex steps such as Nafion and carbon cloth treatment, making it convenient, efficient, and low-cost. The boron-doped self-supporting three-dimensional non-metallic carbon-based catalytic electrode produced is virtually pollution-free when discarded and easy to recycle.

To provide a carbon carrier which achieves effective maintenance of performance of a metal-supported catalyst, and to provide a metal-supported catalyst, an electrode and a battery in which performance is effectively maintained.SOLUTION: Wherein a volume of pores having pore diameters in a range of more than 77K and 0nm or less, which is obtained by a DFT method from a nitrogen-adsorption isotherm at a temperature of 70nm, is 0. 70cm3 / g or less, A volume of pores having pore diameters less than 5nm is 0. 31cm3 / g or more, a true concentration obtained by a constant volume expansion method is 1. 9g / cm3 or more, and a half width at half maximum of a D band having a peak top near a Raman shift 1340cm of - 1 is 50cm of - 1 or less.SELECTED DRAWING: None

The invention relates to the technical field of batteries, in particular to porous carbon. The invention provides porous carbon, the porous carbon comprises micropores, the percentage of the pore volume of the micropores in the total pore volume is greater than or equal to 85%, and in a pore distribution curve with the abscissa being the pore diameter and the ordinate being the differential pore volume dV / dW obtained by a nitrogen adsorption method test, the differential pore volume dV / dW of the porous carbon is greater than 0.05 cm < 3 >. G <-1 >. Nm <-1 > within the pore diameter range of 1-2nm. The porous carbon has proper microporosity and pore size distribution in Koelreuteria-shaped distribution, can effectively improve the silicon loading efficiency, reserves a part of space for volume enlargement caused by silicon expansion in the nanometer silicon circulation process, has the effect of relieving volume expansion when lithium is embedded into silicon, can reduce the volume expansion rate of the silicon-based negative electrode material, and improves the silicon-based negative electrode material performance. The cycling stability of the battery is improved.

The present invention provides a silicon dioxide particle and a method for producing the same. The silicon dioxide particle contains a nitrogen element-containing compound, and when the pore volume of pores having a pore diameter of 1 nm or more and 50 nm or less, which is obtained from a pore distribution curve of the silicon dioxide particle obtained by a nitrogen adsorption method before and after firing at 350°C, is respectively set as A and B, B / A is 1.2 or more and 5 or less, and B is 0.2 cm 3 / g or more and 3 cm 3 / g or less.

Provided are surface-treated sol-gel silica particles or the like which have little change in charge when the environment changes, and which can impart good printing characteristics to a toner when used as an external additive for the toner. Surface-treated sol-gel silica particles having R2SiO3 / 2 units and R43SiO1 / 2 units (R2 and R4 are monovalent hydrocarbon groups) on the surface, satisfying (1) to (7) (1) a median diameter as determined by a dynamic light scattering method of 50 nm to 300 nm, (2) an average circularity of 0.80 to 1.0, (3) a refractive index of 1.380 to 1.420, (4) a true density of 1.7000 g / cm < 3 > or more and less than 1.9000 g / cm < 3 >, (5) a volume resistivity of 1011 Omega cm or more, and (6) a ratio represented by water vapor adsorption specific surface area / nitrogen adsorption specific surface area of 2.00 to 10.0. And (7) the moisture absorption rate when exposed at 30 DEG C / 90% RH for 2 hours is 6.0-11 mass% with respect to the dry mass when dried at 150 DEG C for 1 day.