384 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 relates to the technical field of molecular sieves, in particular to a molecular sieve and a preparation method and application thereof in nitrogen separation.The preparation method comprises the steps that a carbonized material and 3-chloropropyltrimethoxysilane are added into methylbenzene, heating is conducted under nitrogen protection till a reflux reaction is conducted for 12-48 h, after the reaction is finished, the room temperature is recovered, filtering is conducted, a product is collected, washing and drying are conducted, and a modified carbonized material is obtained; and adding the modified carbonized material and an ionic liquid into absolute ethyl alcohol, heating to reflux reaction for 12-48 hours, after the reaction is finished, recovering to room temperature, filtering, collecting a product, performing Soxhlet extraction with dichloromethane for 12-48 hours, drying to obtain an immobilized ionic liquid carbonized material, and performing CO2 activation and vapor deposition on the immobilized ionic liquid carbonized material to obtain the molecular sieve. The molecular sieve prepared by the invention has a relatively high specific surface area, and shows excellent performance of selectively adsorbing nitrogen in a methane and nitrogen mixed system.

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 object of the present invention is to provide an anatase type titanium oxide powder having a large specific surface area and high dispersibility, and a method for producing the same. The titanium oxide powder has a BET specific surface area of ​​300 m2 / g or more and 480 m2 / g or less as measured using a nitrogen adsorption method, an anatase content of the crystal phase of 90% or more as measured using XRD measurement, and a spin-spin relaxation time T2 of 46 ms or more and 103 ms or less as measured by pulse NMR of a 5% by mass suspension prepared in ion-exchanged water.

The invention relates to an ammonia nitrogen adsorption type MABR membrane material as well as a preparation method and application thereof. The ammonia nitrogen adsorption type MABR membrane material comprises a porous supporting layer and a membrane layer which is located on the surface of the porous supporting layer and has an ammonia nitrogen adsorption function, the membrane layer contains functional groups, and the functional groups are one or more of hydroxyl, amino or epoxy groups. The membrane layer containing specific functional groups is introduced to the surface of the porous supporting layer, on one hand, the functional groups in the membrane layer can interact with ammonia nitrogen through Van der Waals force, electrostatic interaction, hydrogen bonds and the like, physical adsorption of the ammonia nitrogen is achieved, the ammonia nitrogen is promoted to approach the surface of the MABR membrane, and therefore the ammonia nitrogen is effectively adsorbed near the surface of the membrane; convenient conditions are provided for subsequent treatment; on the other hand, the biocompatibility of the membrane surface can be improved, attachment and growth of microorganisms are promoted, the oxidation process of the membrane surface biological membrane on ammonia nitrogen is further enhanced, and the treatment effect of the ammonia nitrogen is effectively improved through the synergistic effect.

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 invention relates to a continental facies shale oil mobility evaluation method, and belongs to the technical field of shale oil development. Comprising the following steps: step 1, carrying out a two-dimensional nuclear magnetic resonance experiment to obtain the content of free hydrocarbon SF; 2, carrying out a total organic carbon determination experiment to obtain a total organic carbon TOC value of the sample; 3, carrying out a low-temperature nitrogen adsorption experiment, and calculating the fractal dimension D of the sample; and 4, establishing a correlation between the fractal dimension D and the shale oil mobility evaluation factor SF / TOC so as to evaluate the mobility of the shale oil. According to the shale oil mobility evaluation method provided by the invention, only one experiment of low-temperature nitrogen adsorption needs to be carried out, so that the cost is saved. The shale oil mobility is evaluated by calculating the fractal dimension D of the shale sample, and the method has the advantages of being scientific in experimental principle, simple and convenient to operate, excellent in application effect, green, safe and environmentally friendly.

The invention belongs to the field of unconventional oil and gas exploration and development, and particularly relates to a shale reservoir micro-pore structure feature joint characterization method. The method comprises the following steps: respectively obtaining a pore size distribution diagram A corresponding to the pore volume of shale according to a low-temperature nitrogen adsorption experiment result, a nuclear magnetic resonance experiment result and a high-pressure mercury injection experiment result carried out on a shale sample in a research area; a pore size distribution diagram B corresponding to the pore volume of the shale and a pore size distribution diagram C corresponding to the pore volume of the shale; correcting the pore size distribution diagram C corresponding to the pore volume of the shale according to the compression ratio of the shale sample to obtain a pore size distribution diagram D corresponding to the pore volume of the shale; and splicing and combining the aperture distribution diagram A, the aperture distribution diagram B and the aperture distribution diagram D to obtain a pore volume-aperture curve diagram S. By adopting the method disclosed by the invention, the accuracy of characterizing the micro-pore structure characteristics of the shale reservoir can be greatly improved.

The invention relates to the technical field of batteries, in particular to a porous carbon and silicon carbon negative electrode material and a preparation method and application thereof. 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 1-2 nm. 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.

This porous carbon material has, in a pore size distribution measured by mercury porosimetry, a first peak positioned in a pore diameter range from equal to or greater than 3 nm to less than 10 nm and a second peak positioned in a pore diameter range from equal to or greater than 10 nm to equal to or less than 1 µm, and satisfies at least one of the following (A), (B), and (C).　(A) The X-ray diffraction pattern has a peak (i) that has a half-value width of 0.6° or less and a peak top in the range of 2θ = 25° to 27°.　(B) In measurement of the nitrogen adsorption, the amount of nitrogen adsorption when the relative pressure is 0.2 is 10 cm3 / g to 250 cm3 / g.　(C) The surface oxygen concentration measured by XPS is not more than 6 at%.

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.

The invention discloses an ammonia nitrogen adsorption material for soil improvement as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, mixing straw chippings with zeolite powder to obtain a mixed raw material; then putting the mixed raw material into a high-temperature tubular furnace for co-pyrolysis to obtain a composite co-pyrolysis product; and finally, adding the composite co-pyrolysis product into a NaOH solution, uniformly stirring, oscillating and dipping, taking out, repeatedly cleaning with deionized water to be neutral, and drying in a drying oven to prepare an alkali modified product, namely the ammonia nitrogen adsorption material. According to the application, the material adsorbing NH4 < + >-N is added into soil and is used for improving soil performance, so that germination and growth of plants are promoted; the composite material with high NH4 < + >-N adsorption capacity is prepared through co-pyrolysis of the zeolite and the straw, the composite material adsorbing NH4 < + >-N serves as a soil conditioner to be recycled, the adsorption performance of the biochar material to NH4 < + >-N is improved by supplementing the zeolite, and meanwhile the natural loose and porous mineral property of the biochar material also has the feasibility of soil improvement.

[Problem] To provide iridium oxide suitable for proton exchange membrane-type water electrolysis, the iridium oxide having high initial activity and being excellent in stability during long-term operation. [Solution] Provided is iridium oxide having a rutile structure, the iridium oxide being characterized by having: a crystallite size of 2.0 nm to 4.0 nm as calculated from a peak of a (110) plane of the rutile-structured iridium oxide determined by X-ray diffraction; and a BET specific surface area, measured by nitrogen adsorption measurement, of 70 m2 / g to 120 m2 / g.

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.

The invention provides a VPSA oxygen production molecular sieve and a preparation method thereof, and relates to the technical field of molecular sieves. The preparation method comprises the following steps: mixing X-type molecular sieve raw powder, a binder, an organic pore-forming agent and a forming liquid for forming, and sequentially carrying out first drying and first roasting on an obtained molecular sieve intermediate product to obtain a primary roasting intermediate; carrying out countercurrent circulation crystallization on the primary roasting intermediate by adopting a silicon-containing alkaline aqueous solution to obtain a fully crystallized intermediate; carrying out calcium ion exchange on the total crystal intermediate to obtain an exchange intermediate; and sequentially carrying out second drying and second roasting on the exchange intermediate to obtain the VPSA oxygen production molecular sieve. The prepared VPSA oxygen production molecular sieve has high nitrogen adsorption capacity (greater than or equal to 1.4 mol / g (25 DEG C, 760 mmHg), high nitrogen-oxygen separation coefficient (greater than or equal to 4.2 (25 DEG C, 760 mmHg)), excellent nitrogen adsorption rate and low impurity crystal content (the A-type impurity crystal content is less than or equal to 1%).

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.

To provide a rubber composition for a seismic isolation rubber laminate, which has an excellent effect of suppressing hardening phenomenon, and a seismic isolation rubber laminate. [Solution] The rubber composition for a seismic isolation rubber laminate is used in a rubber layer of the seismic isolation rubber laminate, and contains the following components (A) to (C), with the content of component (B) being 10 to 30 parts by mass per 100 parts by mass of component (A): (A) At least one of isoprene rubber and butadiene rubber (B) Plasticizer with molecular weight of 300 to 900 (C) DBP oil absorption is 100 ml / 100 g or more, iodine adsorption is 150 mg / g or more, and nitrogen adsorption specific surface area is 140 m 2 / g or more of carbon black

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 utility model discloses a nitrogen-making adsorption cylinder, including an adsorption cylinder body, a nitrogen buffer and a motor, wherein the bottom end of the adsorption cylinder body is fixedly connected with a connecting plate, and the bottom end of the connecting plate is fixedly connected with a limiting block, the surface of the limiting block is sleeved with a rectangular frame, and the bottom end of the rectangular frame is fixedly connected with a supporting plate, and a threaded rod is inserted inside the rectangular frame. The utility model drives the limiting block to move on its surface by setting a threaded rod, thereby facilitating the adjustment of the distance between the adsorption cylinder body and the nitrogen buffer, facilitating the connection of the interface on the right side of the adsorption cylinder body with the interface on the left side of the nitrogen buffer, and assisting the movement of the fixed frame through a roller, thereby greatly improving the practicality of the device, generating a gap between the second sealing plate and the supporting bar, and allowing the lubricating oil to drip from the gap to the bottom of the fixed frame, and then drip to the surface of the roller through the feeding hole, and evenly smeared on its surface, thereby playing a lubricating role and assisting the movement of the fixed frame.

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).