62results about How to "Help pass" patented technology

The invention belongs to the technical field of the energy and chemical industry and particularly relates to a nickel-based steam reforming catalyst for biomass tar and a preparation and application method of the catalyst. The catalyst adopts low-cost brown coal as a carrier and comprises the following components by weight percent: 23-25% of Ni, 64.26-66.26% of C, 6.06% of O and 6% of impurity elements. The catalyst is prepared by adopting the cooperation of an ion exchange method and an impregnation method. The catalyst has the good activity and economy, the brown coal is low in cost and large in specific surface area, after being washed by sodium hydroxide, micropores of the brown coal become mesopores and macropores, so that macromolecular compounds of the tar are relatively easy to pass; simultaneously, a relatively large quantity of new through holes are also formed in the brown coal; in the process of catalytic reformation of the tar, a relatively large quantity of effective pore channels are formed, so that the efficiency for reforming the biomass tar is relatively high; the carbon deposited amount of the catalyst and the carbon consumption amount of catalyst carrier carbon can form dynamic balance, so that the service life of the catalyst is prolonged and the catalyst is not easily inactivated.

The invention relates to a Nafion / sulfonated SiO2 molecular sieve composite proton exchange membrane and a preparation method thereof. the proton exchange membrane takes Nafion alcoholic solution and a sulfonated SiO2 molecular sieve as main raw materials. The preparation method comprises the following steps: distilling the raw materials for removing low-boiling alcohol by a solvent replacement method under reduced pressure to obtain Nafion-DMF solution; proportionally mixing the sulfonated SiO2 molecular sieve with the Nafion-DMF solution and evenly dispersing the obtained mixed solution; keeping standing and defoaming to obtain milky casting solution; and membrane-casting in a clear and flat glass culture ware to obtain the Nafion / sulfonated SiO2 molecular sieve composite membrane afterthermal treatment. The thickness of the composite membrane is 45-55mum, wherein, the content of the sulfonated SiO2 molecular sieve is 1-15%, preferably 1-10%; and the composite membrane has the characteristics of low methanol transmittance and high proton conductivity.

The present invention relates to the field of heat dissipation, specifically refers to a microchannel heat sink, integrated manufacturing and its application in control array antennas. The present invention adopts 3D printing to manufacture the heat sink, and through fluid channels with gradually changing distribution, they are respectively arranged in the largest flow channels. The liquid injection port and the liquid outlet port at the smallest end allow the coolant to pass through the entire fluid channel evenly. The maximum temperature of the radiator is 298K and the minimum temperature is 295K during use. Compared with, the heat dissipation ability is stronger, the temperature distribution after heat dissipation is more uniform, and it has the characteristics of good heat dissipation and temperature uniformity, and no need to use nut sealing rings for packaging in one-time molding.