299 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 belongs to the technical field of pyrolytic carbon black quality detection methods, and particularly relates to a method for determining the specific surface area of carbon black. The method for measuring the specific surface area of the carbon black comprises the following steps: firstly, adding an additive into the carbon black, stirring, centrifuging and filtering; the auxiliary agent is prepared by compounding polyacrylamide, dipolyglycerol dioleate and water; adding water for cleaning, centrifuging, filtering and drying; and finally calculating the specific surface area of the carbon black through a gas adsorption method. According to the method, the carbon black is pretreated, so that the influence of surface oxygen-containing functional groups, aromatic ring impurities and the like on nitrogen adsorption is effectively eliminated, and the problem that the pore structure of the carbon black is damaged by high-temperature degassing in a traditional method is solved through proper microwave irradiation, so that the measured specific surface area result is closer to a true value; methodologies such as precision and repeatability are more stable.

The problem addressed by the present disclosure is to provide: a regenerated carbon black capable of obtaining a rubber composition having excellent damage resistance and capable of improving reinforcement characteristics; a rubber composition containing the regenerated carbon; [Solution] The present invention relates to a regenerated carbon black having a particle diameter (D90) of 310 nm or less at a cumulative volume fraction of 90% as measured in accordance with JIS K 6217-6: 2008, a nitrogen adsorption specific surface area of 50 m2 / g or more and 85 m2 / g or less, and a relative tinting strength of 55 or more as measured in accordance with JIS K 6217-5, and a tire manufactured from the rubber composition.

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.

To provide a carbonaceous material with high performance of adsorbing butanes, a method for producing the same, and an adsorption filter.SOLUTION: With respect to a carbonaceous material according to the present invention, the pore volume (cm3 / g) of pores that each have a pore diameter of 0.80 nm or less as calculated by a QSDFT method per 1 g of the carbonaceous material from the nitrogen adsorption isotherm is from 0.23 cm3 / g to 0.35 cm3 / g inclusive, the packing density as determined in accordance with JIS K1474 (2014) is from 0.43 g / mL to 0.65 g / mL inclusive, and the reactive black 5 value is from 3.0 g / L to 60.0 g / L inclusive.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of shale oil and gas resource evaluation, and discloses a shale organic pore content calculation method considering pore fractal characteristics. The method comprises the following steps: carrying out a back scattering two-dimensional large-area scanning electron microscope experiment on a shale sample in a research area to obtain an organic pore surface porosity; carrying out a total organic carbon determination experiment on the shale sample in the research area to obtain the TOC content of the sample; carrying out a mineral content determination experiment on the shale sample in the research area to obtain the clay mineral content of the sample; carrying out a low-temperature nitrogen adsorption experiment on the shale sample in the research area, and calculating to obtain the fractal dimension of the sample; and establishing a shale organic pore content calculation model through multivariate linear fitting by taking the organic pore surface porosity as a dependent variable and TOC, clay minerals and fractal dimensions as independent variables. According to the method, the content of the organic pores is quantitatively calculated without a scanning electron microscope, the relationship between the micro-pore structure and the development of the organic pores can be effectively represented, and the calculation precision of the model can be effectively improved.

A negative electrode material includes a carbon-based material. In a nitrogen adsorption / desorption test, the negative electrode material satisfies: S1 / S2≥20%, and S2 / S≥15%. S1 represents an adsorption volume of pores with a pore size less than or equal to 2 nm in the negative electrode material, and 0.0003 cm3 / g≤S1≤0.001 cm3 / g. S2 represents an adsorption volume of pores with a pore size greater than 2 nm and less than or equal to 10 nm in the negative electrode material, and 0.0008 cm3 / g≤S1≤0.0025 cm3 / g. S represents an adsorption volume of pores with a pore size less than or equal to 30 nm in the negative electrode material.

A shale adsorbed gas content calculation method belongs to the technical field of shale oil and gas resource evaluation, and comprises the following steps: carrying out an isothermal adsorption experiment to obtain a sample adsorbed gas content; carrying out an organic carbon content determination experiment to obtain a TOC value of the sample; carrying out a mineral content analysis experiment to obtain the clay mineral content; carrying out a low-temperature nitrogen adsorption experiment to calculate fractal dimensions; carrying out a back scattering two-dimensional large-area scanning electron microscope experiment to obtain the porosity of an organic pore surface; carrying out an element analysis experiment on the shale sample in the research area, and calculating to obtain the biological quartz content; the shale adsorbed gas content calculation model is established through multivariate linear fitting by taking the adsorbed gas content as a dependent variable and TOC, the clay mineral content, the fractal dimension, the organic pore surface porosity and the biological quartz content as dependent variables. According to the method disclosed by the invention, various sensitive parameters influencing the development of the organic pores are screened out and introduced into an organic pore surface porosity quantitative calculation model, so that the quantitative calculation of the content of the organic pores is realized under the condition that a scanning electron microscope is not provided.

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

The invention discloses a shale nuclear magnetic resonance aperture calibration method, device, equipment and medium, and relates to the technical field of shale reservoir pore characterization, and the method comprises the following steps: preparing a shale core sample into a nuclear magnetic column sample, drying the nuclear magnetic column sample under a preset high temperature condition, measuring the original nuclear magnetic resonance # imgabs0 # map of the treated column sample, and calculating the original nuclear magnetic resonance # imgabs0 # map according to the original nuclear magnetic resonance # imgabs0 # map. Carrying out water saturation treatment on the treated column sample under a preset high-pressure condition, and measuring a target nuclear magnetic resonance # imgabs1 # map of the column sample subjected to water saturation treatment; obtaining a shale pore nuclear magnetic resonance # imgabs2 # curve, drying the column sample subjected to water saturation treatment under a preset high-temperature condition, performing a nitrogen adsorption experiment on the obtained powder sample, and calculating a nitrogen adsorption pore size distribution curve of the powder sample; acquiring a nuclear magnetic resonance porosity component curve and a nitrogen adsorption porosity component curve; performing nonlinear fitting on the curve, determining a corresponding relation between the nuclear magnetic resonance relaxation time and the nitrogen pore diameter, and calibrating the nuclear magnetic resonance pore diameter of the shale according to the corresponding relation. And aperture calibration is realized.

With respect to a carbonaceous material according to the present invention, the pore volume (cm3 / g) of pores that each have a pore diameter of 0.80 nm or less as calculated per 1 g of the carbonaceous material by a QSDFT method from the nitrogen adsorption isotherm is 0.23 cm3 / g to 0.35 cm3 / g inclusive, the packing density as determined in accordance with JIS K1474 (2014) is 0.43 g / mL to 0.65 g / mL inclusive, and the reactive black 5 value is 3.0 g / L to 60.0 g / L inclusive.

According to an embodiment, an electrode containing an active material containing a titanium oxide is provided. The active material has an average primary particle size of 200 nm or more and 600 nm or less. Regarding the specific surface area S of the electrode based on the nitrogen adsorption method A and the pore specific surface area S based on the mercury intrusion method B satisfy the relationship of 0.3 ≤ S A / S B < 0.6.

The problem addressed by the present application is to provide a rubber composition having excellent vibration-proofing and sound-deadening properties. The rubber composition disclosed by the present application is a crosslinked rubber composition containing ethylene propylene diene rubber (EPDM), 110–190 parts by mass of carbon black per 100 parts by mass of the ethylene propylene diene rubber, 10–35 parts by mass of an aromatic modified terpene resin per 100 parts by mass of the ethylene propylene diene rubber, a crosslinking agent, and oil. The nitrogen adsorption specific surface area of the carbon black is 70–120 m2 / g, the iodine adsorption capacity is 70–125 mg / g, and the DBP oil absorption capacity is 50–100 cm3 / 100 g.

Porous carbon particles for forming a porous carbon film used for a positive electrode of an air battery according to one embodiment of the present invention satisfy all of a) to g).　a) The half width of a D-band peak in a Raman spectrum is 30-60 cm-1.　b) The half width of a G-band peak in the Raman spectrum is 32-80 cm-1.　c) An R value, which is the ratio of the intensity of the D-band peak to the intensity of the G-band peak in the Raman spectrum, is 0.8 or more.　d) A plane spacing d002 of the (002) plane of carbon determined by X-ray diffraction (XRD) has a portion of 0.336-0.355 nm.　e) The volume of pores having a diameter of 1-1000 nm determined by a BJH method from an adsorption isotherm obtained by a nitrogen adsorption method is 1.5-10.0 cm3 / g.　f) The volume of pores having a diameter of 1-100 nm determined by the BJH method from the adsorption isotherm obtained by the nitrogen adsorption method is 1.0-8.0 cm3 / g.　g) The specific surface area determined by the BET method from the adsorption isotherm obtained by the nitrogen adsorption method is 500-2000 cm2 / g.

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 present disclosure relates to a porous carbon body, and more specifically, to a porous carbon body satisfying surface area physical properties including pores having a size of 2 nm or more and 5 nm or less, surface area physical properties including pores having a size of 2 nm or more and 100 nm or less, and surface area physical properties including pores having a size of 2 nm or more and 100 nm or less. And a porous carbon body having three physical properties, which are physical properties on an incremental map of a map in which the value of the nitrogen adsorption isotherm is subtracted from the value of the nitrogen desorption isotherm according to the relative pressure in the nitrogen adsorption / desorption isotherm.

This application relates to the technical field of wastewater treatment, and specifically discloses a treatment process for refinery wastewater. A treatment process for refinery wastewater includes the following steps: I. Cooling, flocculation and air flotation; II. Ammonia nitrogen removal: Adjust the pH value of the refinery wastewater obtained after air flotation treatment to 6.7 - 7.5, then add an ammonia nitrogen adsorbent into the system, with an addition amount of 2 - 2.5 g / L. After stirring for 4 - 5 h, refinery wastewater with an ammonia nitrogen concentration of 50.3 - 50.7 mg / L is obtained. The ammonia nitrogen adsorbent includes a composite adsorbent and a modified zeolite adsorbent with a weight ratio of (1 - 1.2):1; III. Reverse osmosis and activated carbon degradation. The treatment process of this application can be used to treat refinery wastewater with a high ammonia nitrogen concentration (680 - 700 mg / L), has the advantage of a high ammonia nitrogen removal rate, and the final ammonia nitrogen removal rate can reach over 98.06%.

Zeolitic adsorbent for the separation of hydrocarbon isomers The present invention relates to an agglomerated zeolitic adsorbent based on faujasite (FAU) type zeolite crystals, a zeolitic adsorbent comprising barium or barium and potassium, said adsorbent having a pore distribution satisfying the following inequalities: 1) [Math 30] 2) [Math 31] in which VmaHg denotes the macropore volume of the adsorbent measured by mercury intrusion porosimetry, VmeN2 denotes the mesoporous volume of the adsorbent measured by nitrogen adsorption, V2-3.6 corresponds to the mesoporous volume for pore sizes ranging from 2 nm to 3.6 nm, V3.6-15 corresponds to the mesoporous volume for pore sizes ranging from 3.6 nm to 15 nm, V2-3.6 is equal to [Math 32] V2-3.6 = VmeN2 - VmeHg in which VmeHg denotes the mesoporous volume of the adsorbent measured by mercury intrusion porosimetry V3,6-15 is determined by the difference between the volume of mercury introduced at 15 nm and that introduced at 3.6 nm, the volumes being expressed in cm3.g-1, and its preparation process. The invention also relates to the use of the zeolite adsorbent agglomerate for the separation of hydrocarbon mixtures, as well as the process for separating hydrocarbon mixtures using said zeolite adsorbent agglomerate.,

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 present invention relates to a porous carbon in which a slope of an approximate straight line obtained by converting a change in pressure of nitrogen until reaching an adsorption equilibrium at each prescribed relative pressure in measurement of a nitrogen adsorption isotherm into a mass transfer coefficient using the LDF approximation and linearly approximating a relationship between a relative pressure and a mass transfer coefficient at a relative pressure of 1.0 × 10-4 or more and 1.0 × 10-3 or less is 4 or more, and a pore volume of pores having a pore diameter of 2 nm or more and 200 nm or less calculated from the nitrogen adsorption isotherm by a BJH method is 0.8 cm3 / g or more.

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.