Enhancing Mechanical Properties of Reclaimed Carbon

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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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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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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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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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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Method to convert waste tires into high-quality activated carbon using thermal cracking. The process involves separating carbon black from the tires, grinding it, mixing it with coal and pitch, drying, carbonizing, and activating it to produce column-shaped activated carbon with high surface area. This allows recovering valuable carbon from tires and converting it into a commercially viable form for various applications.

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Method for producing high purity recycled carbon black from waste tires that reduces ash content below 1% for use as a high quality filler. The method involves treating the recycled carbon from tire pyrolysis with non-polar and polar solvents before acid or base leaching. This removes oily hydrocarbons exposing metal and non-metal oxides for easier solvent extraction.

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Method for making carbonaceous molded articles using waste tires and coke dust that can be used at high temperatures. The process involves mixing waste tire carbide powder, coke dust, and oxidized pitch powder in specific weight ratios, molding the mixture, and firing it at high temperatures to densify. The oxidized pitch acts as a binding agent. The carbonaceous aggregate composition allows recycling waste tires and coke dust to create molded articles with high temperature resistance and density.

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Preparing a carbonaceous material using waste tire powder and graphite powder for applications like civil engineering materials. The method involves mixing a specific ratio of waste tire powder and graphite powder, compressing the mixture into a pellet, and heating it to form the carbonaceous material. This allows recycling waste tire powder instead of landfilling or incinerating it. The resulting carbonaceous material has properties suitable for civil engineering applications like road construction.

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A method for processing scrap tires and other discarded rubber items to obtain useful carbon products through pyrolysis and further processing. The pyrolysis step involves heating the scrap rubber to convert it into char. This char is then subjected to resonance disintegration, a process using high frequency vibrations, to break down the char particles into finer sizes. The resonance disintegration modifies the carbon particles' surface chemistry and morphology. The resulting carbon products have properties suitable for uses like rubber, inks, pigments, and plastics.

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Method to manufacture carbon molded articles like crucibles using waste tires. The method involves converting the rubber and felt parts of waste tires into carbon powder through carbonization. This carbon powder is mixed with oxidized pitch powder and molded into shapes. The molded pieces are then fired to form carbon molded articles with excellent chemical resistance and erosion resistance. The key is using the rubber and felt from tires instead of expensive mesophase particles or high-cost resins. It leverages the waste tire material to make carbon molded products.

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A method to reduce ash content in carbon materials like carbon black by roasting pyrolyzed waste polymers in molten salt. The method involves pyrolyzing waste polymers in an inert atmosphere to produce pyrolyzed carbon. This pyrolyzed carbon is then roasted in molten salt at temperatures around 400°C for 30-200 minutes. The molten salt reacts with the pyrolyzed carbon to remove impurities and ash, leaving behind low ash carbon material. The salt used contains dissolved metal ions that react with the carbon during roasting to form metal oxides. After roasting, the carbon is washed, dried, and crushed to produce the low ash carbon material.

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