5results about How to "High value-added utilization" patented technology

The invention discloses a method for preparing silicon carbide from a silicon waste material and a waste lithium ion battery graphite anode. The method specifically comprises the following steps: (1) respectively carrying out ball milling and mixing on the diamond wire cutting silicon waste material and the crushed and screened waste lithium ion battery graphite anode; (2) high-temperature smelting, ball milling and roasting; and (3) placing in an acid, stirring, leaching, centrifuging, washing, drying and ball-milling to obtain the high-efficiency leaching agent. According to the method, the diamond wire cutting silicon waste and the waste lithium ion battery graphite anode are used as preparation raw materials, silicon carbide is prepared and purified through the processes of ball milling, material mixing, smelting, roasting, acid leaching, centrifuging, drying and the like, and finally high-purity nanoscale silicon carbide particles are obtained. The recycling of the diamond wire cutting silicon waste and the graphite anode of the waste lithium ion battery not only can reduce resource waste and environmental pollution and improve the utilization rate of the waste, but also can generate considerable economic benefits.

The invention discloses the preparation and application of a nickel oxide cluster modified nickel-nitrogen-carbon single atom catalyst, belonging to the technical field of carbon material preparation. The invention uses sodium chloride as a template, coal tar pitch as a carbon source, nickel chloride as a nickel source, and urea as a nitrogen source; after grinding the coal tar pitch into powder, sodium chloride, nickel chloride and urea are added, and after mixing evenly, the mixture is placed in a planetary ball mill for grinding for 2-10 hours; the ground powder is placed in a carbonization furnace, and heated in an argon atmosphere to prepare a nickel oxide cluster modified nickel-nitrogen-carbon single atom catalyst. The specific surface area of ​​the single atom catalyst can reach 300m 2 / g or more, with a total pore volume of 0.25-2cm 3 / g, as a catalyst for electrochemical reduction of CO2, in an electrolyte of 0.1mol / L potassium bicarbonate, the Faraday efficiency of carbon monoxide can reach more than 96%, and the maximum conversion frequency of carbon monoxide generation can reach 10000h ‑1 The above shows high catalytic performance. The present invention uses coal tar pitch as a carbon source and realizes high added value utilization of the coking byproduct coal tar pitch.

The application relates to the hydrogen energy preparation technical field, in particular to a methanol cracking hydrogen production carbon process and system, the methanol cracking hydrogen production carbon process comprises the following steps: a, preparing methanol gas; b, methanol cracking is carried out through a catalyst system: under an argon atmosphere, the catalyst system is heated to a predetermined temperature, the methanol gas is introduced, and methanol cracking hydrogen production carbon is carried out; the catalyst system comprises an alloy catalyst and a modified metal oxide catalyst; c, product collection: collecting hydrogen and carbon material obtained by cracking. The application provides a methanol cracking hydrogen production carbon process and system, so as to solve the problems of insufficient catalyst activity and selectivity, large reactor energy consumption and high investment.

The invention discloses a production method of low-grade road asphalt. The method comprises the following steps: (1) pretreating a polymer modifier to obtain a polymer precursor; (2) mixing ethylene tar with the polymer precursor, heating and stirring to obtain a premix; (3) carrying out shearing circulation on the premix in the step (2); and (4) performing countercurrent contact on the material obtained in the step (3) and an extraction solvent for supercritical extraction, wherein the obtained raffinate heavy component is used as low-grade asphalt. According to the method, high value-added utilization of ethylene tar can be realized, and the produced low-grade road asphalt has the advantages of high ductility at 10 DEG C before a film and good storage stability.

The application discloses a kind of gradient hierarchical utilization garbage incineration bottom ash preparation's zero clinker ultra-high performance concrete and its preparation method, including following weight parts raw materials: garbage incineration bottom ash 660-700 parts;Mineral powder 460-500 parts;Silica fume 35-45 parts;Fine quartz sand 380-420 parts;Activator 370-380 parts;Modifier 15-17 parts;Steel fiber 110-130 parts.Garbage incineration bottom ash includes following particle size and weight parts garbage incineration bottom ash: 8 μm below garbage incineration bottom ash 35-45 parts;8-40 μm garbage incineration bottom ash 75-85 parts;40-150 μm garbage incineration bottom ash 150-170 parts;150-500 μm garbage incineration bottom ash 380-420 parts.The application cooperates and utilizes garbage incineration bottom ash, mineral powder and silica fume, and does not use Portland cement as UHPC cementing material raw material, and UHPC preparation cost and carbon emission are greatly reduced.