Reclaimed Carbon Enhancement for Tire Performance

Recycled carbon black for tires that improves reinforcement properties while maintaining fracture resistance compared to virgin carbon black. The recycled carbon black has specific particle size, surface area, and color characteristics. It is produced by pyrolyzing waste tires and separating out the carbon black. The recycled carbon black has a particle size D90 of 310 nm or less, a nitrogen adsorption surface area of 50-85 m2/g, and a specific tint strength of 55 or more. This allows making tires with better reinforcement properties from recycled carbon black compared to virgin carbon black.

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Preparing high-density and high-strength carbon graphite materials using a short-process that avoids the long cycles and high costs of traditional methods. The key is adding both heterogeneous and homogeneous artificial volatile matter to the green body during roasting. This provides internal pressure as the volatile gases evaporate, aiding sintering and density. It also helps fill pores, reducing mass loss and defects. The heterogeneous volatile matter is mixed with the carbonaceous raw materials, while the homogeneous volatile matter is in the green body.

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A method for preparing high-strength carbon graphite products using a unique process that addresses challenges like raw material availability, graphite anisotropy, and internal cracking during production. The method involves mixing ultrafine carbon powder with a low-temperature asphalt and calcium hydroxide using alcohol as a dispersant. The weight ratio of powder, asphalt, and calcium hydroxate is 100-150:1-2:20-30:10-15. This mixture is compacted into graphite shapes without kneading or molding. The anisotropy and cracking issues are avoided due to the uniform dispersion of components in the alcohol solution. The low-temperature asphalt also reduces the graphite shrinkage during temperature changes. The resulting graphite products have improved strength and isotropy compared to conventional methods.

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Preparing high-density and high-strength carbon materials using waste carbon composite materials. The method involves mechanically shaping the waste to dissociate the interfaces between carbon fiber and pyrolytic carbon. This is followed by self-sintering and traditional sintering to densify the material. The mechanical shaping reduces porosity and refines particles to increase density. The self-sintering leverages the mesophase carbon microspheres' property to coordinate traditional sintering.

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High-density and high-strength special carbon material prepared by a cross-linking promotion process for applications like aerospace, transportation, energy and chemical industry. The carbon material is made by mixing carbon aggregate and modified asphalt binder with specific ratios. The modified asphalt has a softening point of 100-120°C and low quinoline insoluble matter content. This composition reduces volume expansion during roasting, increases density, and improves mechanical properties compared to traditional carbon materials.

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Preparing high-density, high-strength carbon materials from mesophase carbon microspheres. The method involves compressing the mesophase carbon microspheres at high pressure and temperature to densify and strengthen them. The densification process involves heating the microspheres in an inert atmosphere at temperatures above 2500°C and pressures above 20 MPa to form the high-density, high-strength carbon material. This method allows achieving carbon densities above 1.9 g/cm3 and flexural strengths above 97 MPa.

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Method for regenerating activated carbon from waste tire carbon black to improve its properties and value. The process involves treating the tire carbon black, granulating it, and then activating it again at high temperature. This removes impurities, improves adsorption capacity, and reduces carbon loss during activation compared to directly activating tire carbon black.

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Upgrading low-quality carbon fibers by pyrolyzing organic compounds like methane in their presence to improve mechanical and electrical properties. The process involves capturing some of the formed carbon particles inside a porous carbon material like carbon fiber. This reduces the porosity of the material while embedding carbon black particles. The embedded carbon black fills pores and heals defects in the original fiber, enhancing its properties. The fiber acts as a Joule heating element to drive the pyrolysis by passing electrical current through it. The carbonization process converts the fiber into a more useful product compared to the original low-quality fiber.

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Efficient modification method to optimize the structure and function of waste tire pyrolysis carbon black, enabling its recycling into high-value rubber products. The method involves selectively breaking down the surface of larger particle size carbon black to expose more active sites, while shielding the smaller particle size carbon black. This is achieved through low-temperature plasma treatment of the carbon black in nitrogen or water vapor atmospheres. The modified carbon black has improved rubber reinforcement properties compared to unmodified carbon black.

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Method to recycle and reuse pyrolysis carbon black from waste tires in tire manufacturing. The method involves treating pyrolysis carbon black with acid and grinding it before activation to restore its reinforcing properties. The acid treatment removes ash and organic molecules, and grinding reduces particle size. This improves the elongation of the regenerated carbon black compared to untreated pyrolysis carbon black. The acid treatment is followed by activation under controlled conditions to further enhance the carbon black properties. The regenerated carbon black can then be used in tire rubber instead of virgin carbon black.

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A method for granulating carbon black from waste tires that improves the quality and yield of recovered carbon black. The method involves adding a modification solution and an alkaline solution during the granulation process. The modification solution prevents agglomeration and improves conductivity of the carbon black. The alkaline solution neutralizes acidity of the binder to reduce ash content and improve carbon black quality.

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A method to prepare supercapacitors using waste tire pyrolysis carbon black as electrode material to improve specific capacitance. The method involves activating the waste tire carbon black with a combination of carbon dioxide and nitrogen at high temperatures. The CO2 promotes pore formation and expansion, while the N2 prevents excessive graphitization. This treatment increases the specific surface area and porosity of the carbon black, enhancing its performance as an electrode material in supercapacitors compared to untreated waste tire carbon black.

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High-density carbon production technology that involves heating and compressing carbon materials in an inert gas environment to create dense carbon products with improved bonding strength. The process uses carbon materials prepared by specific heating and crushing of solid pitch to produce carbon with enhanced self-sintering properties. This allows high-density carbon products to be made through heating and pressing the carbon material instead of complex multi-step processes. The inert gas protection prevents oxidation during compression. The simplified process improves efficiency, saves energy, and provides denser carbon products with better bonding compared to traditional methods.

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Process for pyrolyzing waste tires to produce fuel oil and carbon black while reducing emissions and waste. The process involves pyrolyzing tires at 350-400°C using the high-temperature flue gas from combusting the pyrolysis gas as the heat source. The pyrolysis gas is condensed to recover pyrolysis oil. A rotating rake roller crushes and agitates the tires to pyrolyze the rubber completely. A three-stage bell jar feeding mechanism isolates the tires from the pyrolysis chamber. The pyrolysis exhaust is condensed, fractionated, and used as process fluid. The carbon black is consolidated using maltodextrin solution to enhance particle strength.

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Preparing a composite material for rubber using graphene grafted onto waste tire pyrolysis carbon black. The method involves dispersing graphene oxide with a co-dispersant like sodium dodecylbenzene sulfonate, followed by chemical modification with a coupling agent like Si69, KH550, or KH570. The modified graphene is then mixed with waste tire pyrolysis carbon black to make a composite material. The graphene enhances rubber properties like strength, wear resistance, and heat generation, while the waste tire carbon black reduces ash content. The composite balances cost and performance compared to using graphene or waste tire carbon black alone.

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A heat treatment method to modify carbon nanotube aggregates and improve their mechanical properties. The method involves heating the carbon nanotube aggregates to a high temperature followed by slow cooling. This process repairs defects, generates functional groups, increases force between nanotubes, and shrinks the aggregate. It enhances strength, modulus, elongation, conductivity, and uniformity compared to untreated aggregates.

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A method for producing desulfurization and denitrification carbon with improved performance for flue gas treatment. The method involves external heating carbonization followed by activation in an integrated furnace. The carbonization is done slowly at low temperatures to allow ordered pyrolysis of the material, maximizing pore formation. The activation is done at high temperatures above 650°C where the material polycondenses and coke forms while still in an activator atmosphere. This preserves pore structure and wear resistance while increasing compressive strength and ignition point.

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Recycling worn tires and rubber products to obtain carbon-containing material with improved properties for use in manufacturing new tires. The recycling process involves mechanically shredding the tires, removing bead rings, and treating the shredded material with inhibitors to prevent metal and particle contamination during pyrolysis. This reduces impurities and increases surface activity of the carbon-containing material, allowing it to be used as a filler in new tires without negatively impacting strength and performance.

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Utilizing waste tires as a resource by converting them into high-performance carbon materials for lithium and sodium batteries. The method involves activating the waste tires with acids or alkalis, followed by calcination at 600-800°C to create carbon materials with higher surface areas. These activated carbon materials from waste tires have higher specific capacitance compared to unactivated carbon when used as battery electrodes. The alkali-activated carbon has even better performance. This provides a sustainable and environmentally friendly alternative to burning tires while producing valuable battery materials.

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Hard carbon material and method to prepare hard carbon/graphite composite materials for lithium-ion battery negative electrodes using waste tire reclaimed rubber as a low-cost, recycled raw material. The method involves carbonization of the rubber powder at temperatures of 900-1500°C for 2-6 hours. The resulting hard carbon can be used as a negative electrode material or coated onto graphite particles to improve charge/discharge performance. Recycling waste tire rubber in this way reduces cost and provides a sustainable alternative to high-molecular polymer precursors for hard carbon.

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