Pyrolytic Oil Recovery from Recycled Tires

Continuous low-temperature pyrolysis device that efficiently converts waste tires into useful products like carbon black and oil. The device uses pneumatic feeding of waste tire chips into the reactor instead of mechanical conveyors to prevent air introduction. It also condenses the pyrolysis gas to extract oil by forming an oil film inside the condensation chamber. This increases condensation efficiency and allows higher quality oil extraction. The carbon black is recovered by vacuum suction instead of conveyors for compactness. The modularized design enables compact pyrolysis facilities with reduced footprint, cost, and maintenance compared to conventional systems.

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Thermal pyrolysis of waste tires is an economically viable industrial method for material recovery and energy production. This article presents the results research on processing used car by in a nitrogen-free environment under atmospheric pressure. Tires sourced from local vulcanization center were as raw material. The process was conducted using experimental setup consisting reactor, collector gases liquids, condenser. For experiment, 4180 g tire fragments used. carried out at temperature 500C pressure one hour. As result, 1800 ml oil, 1320 carbon black, 600 metallic cord, 630 gas obtained. physical properties oil studied: density 0.906 kg/m3, kinematic viscosity 0.75 mm2/s, acidity 104.4 mg/dm3. Infrared spectroscopy analysis revealed presence aromatic, alkene, alkyne groups. Liquid fuel obtained distillation unit. From 150 60 liquid produced. Elemental indicated that contained nitrogen (2.57%) sulfur (1.27%).

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This study focuses on the production and characterization of activated carbons derived from carbonaceous residue obtained through catalytic pyrolysis waste tires. A process was conducted at 450 C 575 C, employing two zeolitic catalysts, commercial ZSM-5 a synthesized zeolite (PZ2), developed natural pozzolan, which played key role in performance quality resulting carbons. After pyrolysis, solid residues were chemically using KOH to improve their porous structure surface characteristics. Comprehensive carried out, including textural properties (BET area porosity) morphological (SEM) analysis carbons, as well crystallinity evaluation (XRD) catalysts. The BET areas PZ2-T1-AK PZ2-T2-AK reached 608.65 m2/g 624.37 m2/g, respectively, values that surpass those reported for similar materials under comparable activation conditions. suggests strong potential applications adsorption processes, pollutant removal. These findings demonstrate effectiveness zeolite-catalyzed particularly PZ2, sustainable strategy transforming tire into high-performance adsorbent materials. approach supports circ... Read More

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Pyrolysis furnace with upper and lower screws for efficiently converting waste tires into oil and gas. The furnace has two screws, one on top and one below, that rotate simultaneously. The screws have blades with notches forming fin-like protrusions. This allows the screws to both convey the waste tire feedstock and agitate it simultaneously. The upper screw feeds the waste tires into the furnace, the lower screw extracts the pyrolysis products. The screws have heating around them to thermally crack the tires. The upper and lower screws smoothen the cracking process and reduce back pressure. The fin-like protrusions agitate the feedstock for increased conversion efficiency.

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The innovative recycling of waste tires into fuel is essential for promoting sustainable development, enhancing valorization, and advancing waste-to-energy technologies. For the processing fr. 200 C, separated from liquid products pyrolysis process tires, polycondensation with formaldehyde extraction a polar solvent (N-methyl-2-pyrrolidone) was used. Due to sequential application these processes, raffinate product produced that contains significantly fewer undesirable compounds, such as reactive unsaturated hydrocarbons aromatics, which can negatively affect gasoline. Additionally, this demonstrates chemical stability during storage. its operational properties, obtained serve high-quality component gasoline production, advisable when mixed low-octane gas condensate. As result compounding, Euro 4 an octane number equal 93 according experimental method. possibility effectively using extract (concentrate aromatic compounds) plasticizer waterproofing mastic shown. Overall, valorization tire contributes reduction consistent industrial innovation by replacing primary petrochemical fe... Read More

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Abstract. Waste tyre pyrolysis is a viable technology to convert tyres into useful products such as oil, fuel and gas. Most of the research focus on investigating effect operating parameters oil product. With increasing applications solid char produced, it found that no detailed investigation temperature yield properties. Thus, this project aimed determine tyre- derived A total three samples were produced from rubber crumb, namely Char400, Char550 Char700, corresponding their at 400C, 550C 700C respectively. Rubber crumb these 3 sent Fourier Transform Infrared Spectroscopy (FTIR), Elemental analysis carbon, hydrogen, nitrogen sulphur (CHNS), Scanning Electron Microscopy (SEM) Brunauer-Emmett-Teller (BET) for characterization purposes. It was 400C led significant reduction 76% 36.25%. In terms composition, Char400 has additional alkane phenol functional groups indicating main constituents in did not decompose completely low temperatures. Furthermore, higher temperatures lower carbon content, specific surface area, average pore width more structured morphology. Overall, affects... Read More

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Recycling waste tires into useful rubber compounds using microwave-assisted surface devulcanization. The process involves separating metal and fibers from waste tires, micronizing the vulcanized crumb rubber, applying a dose of microwave energy to sever sulfidic crosslinks, mixing the devulcanized rubber with plastic and oil, and extruding it to produce recycled rubber compounds like crumb rubber or end-of-life tire compounds. The microwave devulcanization step enables efficient recycling of waste tires without harsh solvents or chemical compatibilizers.

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Efficient production of chemical products and carbides from waste tires using a multi-step process involving pyrolysis, hydrogenolysis, and steam cracking. The process involves pyrolyzing crushed tire waste to obtain a gas fraction, oil fraction, and residual fraction. The carbide is recovered from the residual fraction. The oil fraction is hydrogenolysis to produce a light fraction and heavy fraction. The heavy fraction is steam cracked to create chemical products and a new carbide feedstock. This allows efficient conversion of tire waste into useful chemical products while recovering carbide as a byproduct.

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Hydrotreatment process for waste tire pyrolysis oil that overcomes issues like high diolefin content, high sulfur, nitrogen, and chlorine levels. The process involves a specific sequence and catalyst to enable hydrogenation of waste tire pyrolysis oil. It includes mixing the pyrolysis oil with hydrogen at high pressure (15 MPa or more) to hydrogenate the oil. This is followed by a second mixing step with hydrogen at lower pressure (5 MPa or more) using a different hydrogenation catalyst. This two-step hydrogenation sequence allows effective hydrogenation of the oil without deactivating the catalyst due to sulfur and nitrogen levels.

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Economically recovering desulfurized fuel oil and fuel gas from waste tires by using a combination of hydroprocessing and distillation. The process involves hydroprocessing the pyrolysis oil from tires to desulfurize it. The hydroprocessed oil is then distilled into multiple fuel products like kerosene, naphtha, fuel oil, fuel, and diesel. The hydrogen demand of the hydroprocessing is met by recirculating hydrogenated material. The excess fuel gas from pyrolysis is used to generate power. The power production from byproducts and electrolytic hydrogen production from the low-cost power co-produced further reduces costs.

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Simultaneous processing of feedstocks containing pyrolysis oil from plastic waste and renewable resource oils to remove impurities and prepare them for further refining. The process involves steps like selective hydrogenation, hydrodemetallation, and hydrotreating. It allows converting the feedstocks into cleaner products suitable for integration into existing refineries. The steps are done at elevated temperatures and hydrogen pressures to minimize gum formation. This enables handling the pyrolysis oil without clogging issues. The method reduces impurities like dienes, metals, metalloids, chlorine, and sulfur to levels compatible with refinery units.

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Refining high-quality light oil from pyrolysis oil to make it versatile as fuel. The process involves pre-treating the pyrolysis oil to remove impurities, stripping out heavy oil, cracking the remaining hydrocarbons, fractionally distilling the cracked oil, and filtering the final light oil to purify it. This refining method converts pyrolysis oil into high-quality light oil suitable as a general-purpose fuel.

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Upgrading pyrolysis oil from plastic and rubber waste to produce a higher quality fuel with reduced impurities like olefins, solid residues, and heteroatoms. The process involves treating the pyrolysis oil with an aqueous solution and optionally a hydrocarbon fluid to separate into phases. The organic phase is then separated and filtered to obtain the upgraded pyrolysis oil with reduced impurities compared to the original oil. This allows using the upgraded oil as transportation fuel, blending with other fuels, or as a chemical feedstock. The aqueous solution helps extract impurities from the pyrolysis oil into the water phase. The hydrocarbon fluid assists separation and reduces solid residues.

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Method for efficiently producing chemical products and carbides from waste tires. The method involves pyrolyzing crushed tires to obtain a gas, oil, and residue. Then, hydrocracking the tire oil to separate light and heavy fractions. The heavy fraction is steam cracked to make chemical products and carbide feedstock. The carbide is made by thermal decomposition or incomplete combustion of the carbide feedstock. This allows efficient extraction of both chemical products and carbides from waste tires.

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A process for disposing of end-of-life tires (ELT) that provides complete reuse without environmental problems. The process involves pyrolyzing the tires to produce pyrolysis oil. The pyrolysis oil is then subjected to hydrorefining to improve its quality and make it suitable for substituting fossil fuels in industrial processes. This allows converting the tires into a valuable product instead of burning them or landfilling them. The hydrorefining step removes impurities like rubber fines and contaminants to produce a cleaner, more useful oil.

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A method to co-pyrolyze waste tires and waste polyolefin plastics in an anaerobic environment to produce low-oxygen high-quality pyrolysis oil. The method involves mixing the waste tire and waste polyolefin plastics in a 1:1-10 mass ratio, heating them at 400-800°C for 10-60 seconds, and collecting the liquid phase pyrolysis product. The co-pyrolysis of waste tires and waste polyolefin plastics significantly reduces the oxygen content in the pyrolysis oil, improves the yield and quality of the pyrolysis oil, and expands the relationship between waste tires and waste plastics. It provides a coordinated recycling solution for harmless treatment of waste tires and waste plastics while reducing carbon emissions.

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Upgrading pyrolysis oil from organic waste cracking to improve quality and enable deeper processing. The process involves secondary cracking of the pyrolysis oil and water mixture to separate and upgrade the pyrolysis oil. The secondary cracking involves flashing, washing, condensation, and separation to remove impurities and produce refined oil. This improves the quality of the pyrolysis oil compared to direct sale of the mixed condensate.

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Process for recycling rubber shavings from end-of-life tires into resins that can be used in tire production without degrading tire performance. The process involves pyrolysis of the rubber shavings to generate an oil containing olefinic monomers. The oil is then separated into fractions, with the intermediate fraction containing the desired monomers. This fraction is polymerized to form the resins. The process conditions are optimized to maximize monomer yield from the shavings. The resulting resins can be used in tire manufacturing without negatively impacting tire performance.

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A method for producing high-quality oil from waste tires by pyrolysis, separation, and refining. The method involves crushing the waste tires, pyrolyzing them in an ammonia atmosphere under pressure, separating the resulting liquid mixture, and refining the crude oil. The pyrolysis step is done at 425°C for 2 hours. The separation involves cooling and extracting with dichloromethane. The refining step involves hydrogenation with a catalyst and tetrahydronaphthalene. This results in high-quality oil with properties similar to industrial grade oil.

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Pyrolysis of waste rubber like tires to make fuel products that can be used in marine applications. The fuel has specific properties like flash point, boiling range, density, acid number, styrene content, and halogen content. The fuel is derived from pyrolyzing rubber and separating the oil. The pyrolysis conditions are 400-550°C, 1-4 hours residence time, and negative pressure. The oil is then centrifuged to remove solids before separation. The fuel has a flash point above 40°C, boiling point above 140°C, density below 990 kg/m3, acid number below 12, styrene below 7000 ppm, and halogen below 50 mg/kg.

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Efficient and effective methods for separating pyrolysis oil from tire pyrolysis into commercially desirable fractions and a fuel oil fraction. The methods involve initial thin-film distillation to separate a lighter fraction and a heavier fraction. The lighter fraction is further fractionally distilled to obtain improved quality products. The heavier fraction is processed to remove sulfur and nitrogen for use as a fuel oil. The thin-film distillation allows stable separation of the fractions due to low wall temperatures. Vacuum thin-film distillation at 100-400 torr further improves separation.

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Extracting fuel products from waste rubber like tires through pyrolysis and separation to produce valuable fuel compositions. The pyrolysis of waste rubber produces an oil with high levels of black carbon. This oil is then separated to extract two fuel products. One product is a low-density, low-sulfur fuel with low halogen content and low aromatic content. The other product is a high-density fuel with high aromatic content. The low-density fuel has properties suitable for commercial use as a fuel while simultaneously satisfying requirements like low flash point, low sulfur, low halogen, and low aromatic content. This allows using it in tanks, vessels, and equipment without the need for post-use cleaning due to the black color. The high-density fuel has high aromatic content and can be used as a boiling stock.

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Integrated solid waste gentle cracking system for recycling waste tires into usable products. The system involves breaking the tires into rubber particles, mildly pyrolyzing the particles to extract oil, carbon black, and gas, and then further processing the oil and carbon black into modified forms suitable for use in products like rubber, asphalt, plastics, and pigments. The system allows 100% utilization of waste tires by recovering all components.

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Extracting valuable compounds from tire pyrolysis oil using steam distillation and fractional distillation. The process involves initially separating the oil using steam distillation to produce a lighter fraction rich in terpenes and a heavier fraction. The lighter fraction is further distilled to isolate the terpenes and other valuable compounds. This two-stage distillation allows selective extraction of high-value components from tire pyrolysis oil without degradation.

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Extracting valuable compounds from tire pyrolysis oil using a two-stage distillation process. The first stage is steam distillation to separate a lighter fraction containing terpenes like limonene from the heavier fraction. The lighter fraction is then further distilled to isolate commercially valuable products like solvents, flavors, and scents. The heavier fraction can be used as a solvent, fuel oil, or feedstock for chemical processes. The steam distillation avoids high temperatures that decompose the sensitive terpenes.

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A method to recycle waste rubber and plastic while also connecting it to the plant fiber industry. The method involves pyrolyzing waste rubber/plastics to extract oil and other substances. This pyrolysis oil can be blended with plant fiber products to improve their properties. The pyrolysis slag and ash can be thermally regenerated into useful materials. The transformation energy and waste heat from pyrolysis can also be harnessed. This integrates waste rubber/plastics recycling with plant fiber production for a more sustainable and profitable circular economy.

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A system for extracting valuable compounds from pyrolyzed scrap tires while preserving the carbon black solids. The system uses a catalyst/additive that decomposes at the melting point of the rubber to release catalytic ions. This allows the catalyst to contact the rubber as it decomposes and prevents volatile compounds from carrying the catalyst away. The pyrolysis oil is then recovered, purified, and concentrated to extract valuable fragrance and essential oils like limonene. The solids are separated to retain the carbon black. This maximizes value recovery from the pyrolysis process.

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A microwave pyrolysis process to convert end-of-life tires into useful products like fuel oils and gases. The process involves pyrolyzing tires using microwave heating to break down the rubber into gases, liquids, and solid residue. The key innovation is fractionating the vapors from the pyrolysis reaction before condensation to separate out the gases and liquids. This allows controlling the composition and properties of the resulting fuels. The microwave power level is also adjusted to achieve specific pyrolysis rates and heating rates that optimize the fuel yields and qualities. The resulting fuels have low sulfur content and high distillable hydrocarbon fractions.

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A method for extracting oil from waste tires using catalytic decomposition to convert the tire material into fuel oil and carbon black. The method involves shredding the tires, heating them with a catalyst, and separating the resulting oil and carbon black. The oil is further refined through rectification to produce gasoline and diesel fuel. The process aims to recycle tires instead of disposing of them in landfills, and extract value from the tire material as an alternative to burning tires as fuel.

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A method for producing high quality liquid fuel from waste tires and used oil using a unique multi-stage liquefaction process. The method involves swelling the waste tire pieces in aromatic solvents, crushing them, drying, grinding, and mixing with used oil to form a sludge. The sludge is heated to 300-360°C to generate a gas mixture. The gas is flowed through a series of cooled tubes with natural convection to liquefy into fuel. This allows efficient separation of impurities during cooling. The final liquid fuel product is of high quality with low odor and tar compared to conventional methods.

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Apparatus for producing oil from waste tires without incineration. The system involves pyrolyzing the tires at low temperatures around 180-200°C by supplying small quantities of oxygen. The pyrolysis converts the tire components into combustible hydrocarbon gas. The gas is then cooled and condensed to form oil. The cooled gas is first condensed in a larger condenser and then again in a smaller condenser. Sludge separators separate out any solids from the condensed gas. The resulting oil is stored in a tank. The system allows efficient conversion of tire waste into usable oil without incineration and environmental contamination.

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Method for converting waste tires into fuel oil with reduced temperature and time requirements compared to existing methods. The method involves using a catalyst containing barium titanate to crack the rubber particles during pyrolysis. This reduces the organic sulfur content, allowing the production of less stinky fuel oil with higher yield. The barium titanate catalyst lowers the reaction speed and temperature compared to conventional catalysts.

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Method for condensing pyrolysis gas and recovering oil from waste tire pyrolysis that addresses the challenges of oil recovery. The method involves condensing the pyrolysis gas into oil using a two-stage condensation process. The first condenser captures the majority of the oil, while the second condenser captures the remaining oil. This prevents premature condensation and blocking of the condensers due to fine particles. The oil is also separated from water vapor by condensation at different temperatures. This prevents emulsification and allows separation of the oil. The condensed oil is then further processed to remove impurities and obtain a saleable oil product.

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Recycling waste tires and rubber by co-processing with carbon to produce useful synthetic oils and storable high-energy products. The method involves mixing crushed waste rubber and carbon particles in a reactor, optionally with a iron catalyst, and heating at temperatures of 350-550°C for 10-30 minutes. The reaction yields synthetic oils and solid residues. The carbon provides energy input and also helps fix sulfur and oxygenates. The oils can be fractionated into fuel and chemical products. The residues have medium and high caloric energy.

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A method and apparatus for thermally decomposing waste tires and waste oil simultaneously to recover oil and reduce environmental pollution. The tires and oil are pyrolyzed at high temperatures to yield oil, gas, and carbon black. This simultaneous processing increases tire oil recovery and reduces environmental impacts compared to separate processing. The high temperature pyrolysis avoids the low oil yield issues of lower temperature tire pyrolysis. The resulting oil has similar properties to diesel. The heavy metals remain in the residue, allowing its reuse as an asphalt additive.

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Recovering valuable products from used tires through pyrolysis. The pyrolysis process involves heating old tires at high temperatures under vacuum to break down the rubber into oils and gases. The process extracts commercially valuable chemicals like paraffins, naphthenes, olefins, aromatics, and limonene-dl from the tire-derived pyrolytic oils. It also produces carbon black with high iodine adsorption numbers by pyrolyzing tires at specific temperatures and pressures. The process aims to repurpose tire waste into useful products rather than just landfilling or incinerating the tires.

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Extracting commercially valuable chemicals from tire pyrolysis oil, including paraffins, naphthenes, olefins, aromatics, and limonene-dl. The process involves fractional distillation of the tire pyrolysis oil at temperatures below 204°C to isolate these chemicals. This allows recovery of valuable components from tire waste that can be used in various applications. Limonene-dl, a terpene typically found in essential oils, is unexpectedly present in the distillation fraction.

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Recovering valuable chemicals and materials from recycled tires. The method involves pyrolyzing used tires to extract oils, then fractionally distilling them to isolate chemicals like paraffins, naphthenes, olefins, and aromatics. Some of these fractions have commercial value. The pyrolysis also generates a carbonaceous solid containing high-quality carbon black with increased surface area compared to typical tire carbon black. The carbon black is made by pyrolyzing tires at 490-510°C under low pressure.

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Extracting valuable chemicals and improving tire recycling by pyrolyzing used tires and fractionally distilling the resulting oils. The process involves vacuum pyrolyzing old tires at temperatures around 500°C to extract chemicals like paraffins, naphthenes, olefins, aromatics, and limonene-dl from the tire oils. This improves tire recycling by converting tire waste into useful products instead of just landfilling or burning tires. The extracted chemicals can be used as solvents, petrochemical feedstocks, and flavorings. The pyrolysis also produces carbon black with high iodine adsorption numbers.

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Recovering valuable chemicals from used tires and improving the quality of carbon black produced through tire pyrolysis. The process involves fractional distillation of tire pyrolysis oils to extract paraffins, naphthenes, olefins, and aromatics. This separates out commercially useful compounds like limonene-dl from the oil. The high-temperature pyrolysis of tires at 490-510°C under vacuum increases the iodine adsorption number of the resulting carbon black.

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