43results about How to "Improve hydrogen absorption performance" patented technology

The invention relates to a novel catalytic agent for preparing p-aminophenol by using nitrobenzene catalytic hydrogenation and a preparation method thereof. The catalytic agent enables active carbon to serve as a carrier, enables Pt to serve as a main catalytic agent and enables MoS2 to serve as an auxiliary catalytic agent. The preparation step of the catalytic agent comprises (1) preparing Pt/C catalytic agent, namely enabling the Pt to be loaded on the activated carbon through an infusion process; and (2) restoring the auxiliary catalytic agent MoS2 through steeping and roasting under certain H2, loading on the Pt/C, and finally obtaining the catalytic agent for preparing the p-aminophenol. The catalytic agent for synthesizing the p-aminophenol is high in productivity and high in selectivity, and the catalytic agent is good in stability. After 23 times of circulation, the catalytic agent keeps good activity, yield coefficient of the p-aminophenol is above 83%, and the catalytic agent has good industrial application prospect.

The invention provides a kind of single icosahedron quasicrystal material with hydrogen storing function. Its component is Ti100-x-y-zZrxNiyCuz, thereinto, 10 < x < 45, 5 < y < 20, 1 < z < 10. the forming ability of the alloy quasicrystal is strong, and the formed quasicrystal material is single icosahedron structure. It is thermodynamics is stable, and has good hydrogen storing function. It can be applied in gaseous state hydrogen storing material and battery cathode material; meantime, it provides a kind of producing method of the material: according to the count of the component formula of the quasicrystal material, choose powders of Ti, Zr, Ni, and Cu of 100 holes per cm2 chemical purity, encase them in the ball milling pot of the high energy ball mill, the ball material rate is 20 : 1, ball mill for 100 - 200 hours under the protection of argon, seal the ball milled alloy powders in the quartz tube, have heat processing at 1 í‡ 10-3 Pa, the heat processing temperature is 480 - 650 Deg. C, the time is 0.5 - 6 hours. Its craft is simple, the operational ability is strong, and it is easy to be industrialized.

The invention relates to hydrogen absorption fiber paste for an optical fiber composite overhead ground wire (OPGW) optical cable. The hydrogen absorption fiber paste comprises, by weight, 75-85% of base oil, 6-10% of gelatinizing agent, 0.3-0.6% of antioxidant, 0.8-1% of viscosity index improver, 1.5-2% of oil distribution inhibitor and 2-5% of hydrogen absorption agent. The base oil is polyalpha-olefin synthesis oil, and the gelatinizing agent is a composite of an organic gelatinizing agent and an inorganic gelatinizing agent. The hydrogen absorption fiber paste has the advantages of adopting the polyalpha-olefin synthesis oil as the base oil so as to enable the fiber paste to have good high-low-temperature performance; improving the stability of a glue body by adding an appropriate amount of silicon-containing (inorganic) glue body into a silicon-free (organic) glue body; having good hydrogen absorption performance by adding an efficient hydrogen absorption agent, removing hydrogen caused by incompatibility of the fiber paste and stainless steel and caused in welding process, reducing defects in optical fiber lattice and loss of optical fiber, and improving transmission performance of the optical fiber.

The invention belongs to the technical field of chemical industry, and particularly discloses a preparation method of a porous polymer for adsorbing hydrogen. The method comprises the following steps: a) weighing melamine and an aprotic polar solvent, mixing, stirring, dissolving, adding an MDI tripolymer (namely 4,4'-diphenyl-methane-diisocyanate tripolymer), reacting at 150-190 DEG C for 18-36 hours, carrying out suction filtration, washing a sample with acetone, and drying to obtain an intermediate product; and b) putting the intermediate product into a solvent, and refluxing at 40-80 DEG C for 10-15 hours, so as to obtain the porous polymer. The method disclosed by the invention has the advantages of low cost of raw materials for preparing a hydrogen storage material, simple process and short time; the technological conditions are easy to control; the prepared porous polymer can adsorb a great amount of hydrogen under high pressure; through detection, the specific surface area of the porous polymer can be up to 270m<2>/g; the micropore volume accounts for 12%-20% of total pore volume; when the maximal constant volume pressure is 7MPa, the adsorbing capacity of the porous polymer prepared by the method on hydrogen can be up to 8wt%; and the hydrogen storage capacity is high.

The invention discloses a zirconium alloy material for a light water reactor under higher burnup. The zirconium alloy material comprises 0.10-0.40 weight% of tin, 0.50-1.50 weight% of niobium, 0.01-0.20 weight% of iron and 0.06-0.20 weight% of oxygen, and further comprises 0.01-0.09 weight% of vanadium and/or 0.01-0.09 weight% of copper and the balance of zirconium. The zirconium alloy has excellent corrosion resistance; and compared with the zirconium alloy in the prior art, the zirconium alloy has more excellent corrosion resistance in high-temperature pure water, and is suitable for fuel rod cladding materials and corrosion resistant zirconium alloy materials of grillwork strips and structural parts under higher burnout of nuclear reactors.

Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.

The invention relates to a preparation method of a composite hydrogen absorption material and belongs to the technical field of energy saving and environmental protection. Crystalline carbon is takenas a grinding medium, when a magnesium alloy and carbon granules are extruded under collision, the carbon granules can be embedded into the magnesium alloy, magnesium alloy granules are peeled, refined carbon granules adhere to the surfaces of magnalium granules to disperse the alloy granules, cold welding due to collision between the alloy granules is hindered, fresh surface of magnesium is exposed continuously by ball milling, the surface energy is higher than that of magnesium powder without ball milling, hydrogen molecules are adsorbed and dissociated more easily by magnesium, higher energy is produced at effective collision moment, activation energy needed by H atoms for entering a magnesium lattice is provided, then H supports palladium and compounded with modified polyvinyl alcohol,H2 can be diffused to catalyst surface rapidly and converted into free H radicals, the free H radicals are subjected to addition with acetylene linkage under synergy of palladium, so that effective hydrogen absorption is realized, hydrogen absorption capacity is increased, and hydrogen absorption performance of the material is improved.

The invention discloses a hydrogen absorption material for electronic packaging and a preparation method thereof, and mainly aims at control over the content of hydrogen in sealed electronic devices and assemblies. The hydrogen absorption material comprises a Ti substrate for playing a role of storing hydrogen and a Pd film which is combined on the Ti substrate and achieves the effects of catalytic cracking and penetration. The preparation method comprises the two steps of pretreatment of the hydrogen-storage Ti substrate and magnetron sputtering of the Pd film layer. The hydrogen absorption material can be used in various types of sealed electronic devices and assemblies, absorbs the hydrogen in the sealed devices and assemblies, and therefore, the situation that chips and the like in thesealed devices are affected by the hydrogen to lose efficacy is prevented, the production efficiency and the reliability are high, and it is not required that a packaged shell and a packaged device are additionally subjected to hydrogen removal.

The invention provides a nano multilayer structure metal hydrogen absorption film as well as a preparation method and application thereof, and relates to the technical field of hydrogen absorption materials. The invention provides a nano multilayer structure metal hydrogen absorption film. The nano multilayer structure metal hydrogen absorption film comprises a nano multilayer structure metal layer and a metal catalyst layer which are sequentially arranged in a laminated mode. The nano multilayer structure metal layer comprises a plurality of hydrogen absorption metal layers which are alternately laminated; the hydrogen absorption metal layer comprises a zirconium layer and a titanium layer; the component of the metal catalyst layer comprises palladium. According to the invention, the nanometer multilayer structure metal layer has a good combination effect on hydrogen, the metal catalytic layer has catalytic activity on hydrogen, and the nanometer multilayer structure metal layer and the metal catalytic layer are arranged in a laminated manner, so that hydrogen in a closed space can be effectively absorbed.

The invention discloses a catalyst for preparing 2-ethylhexanal, comprising Al ₂ o ₃ carrier, and loaded on the Al ₂ o ₃ The first metal component and the second metal component on the carrier are characterized in that the first metal component is Ag, and one or both of Co and Rh; the second metal component is Pd ; Based on the total weight of the catalyst, the content of the first metal component is 0.01-0.5wt‰, and the content of the second metal component is 0.01-1.0wt%. The present invention also discloses a preparation method of the catalyst and a preparation method of 2-ethylhexanal. The invention can efficiently carry out the selective hydrogenation of isooctenal, greatly improves the catalyst processing capacity, has simple technological process, low energy consumption, and meanwhile, the raw material conversion rate reaches 99%, and the product selectivity reaches more than 98.5%.

The invention relates to a method for removing trichloroethylene from groundwater through electroreduction. The method includes the following steps that firstly, a trichloro ethylene containing water body is introduced into a cathode chamber of a double-chamber double-electrode electrochemical removal device, and the pH of the cathode chamber is adjusted to be 5.8-6.4; the electrolyte of an anode chamber is a 8-10 g/L sodium sulfate solution; after powering on, the voltage is kept at 2.5 V for chemical treatment, and according to an existing government standard, the chemical treatment stop time is determined. Through molecular imprinting technical process, and the side, at a cation membrane, of a bipolar membrane has selective adsorption performance for TCE so as to improve the reduction efficiency of the TCE by electrodes. Elemental palladium is deposited on Ti-mesh, and the hydrochlorination performance of the TCE by the electrodes is improved. Pd@Ti-mesh is compounded on the side, at the anode membrane, of the bipolar membrane to achieve a zero polar distance between the electrodes and the membrane. H+ produced by hydrolysis can directly reach a cathode, the content of H+ on the electrode surfaces is improved, and the reduction speed of the TCE by the electrodes is promoted.