Enhance Properties of Reclaimed Carbon

Recovered carbon black (rCB) made by solvolysis of waste tires at low temperature and pressure to minimize agglomeration and carbon deposits. The process involves contacting tire feedstock with a solvent like aromatic hydrocarbon cuts at weight ratios over 3. This solvolysis dissolves tire components better than pyrolysis to make rCB with low carbon residue content (<1%) compared to pyrolyzed carbon blacks. The rCB has properties similar to virgin carbon blacks but with reduced agglomeration and improved dispersibility.

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The growing demand for sustainable and durable pavement materials has led to the exploration of crumb rubber modified bitumen (CRMB) as a promising alternative conventional in flexible pavements. This study investigates effect (CR) content on abrasion resistance bituminous mixes. A series experimental tests were conducted using tile testing machine, per standard procedures, evaluate surface wear performance. Samples prepared with varying CR contents0% (control), 3%, 5%, 7%by weight bitumen. depth was measured each sample assess resistance. results demonstrated clear improvement performance inclusion rubber. control mix exhibited highest 2.8 mm, while CRMB mixes showed progressive reductions wear2.2 mm (3% CR), 1.7 (5% 1.4 (7% CR). indicates enhanced durability resistance, particularly at higher contents. concludes that significantly improves pavements supports effective reuse waste rubber, promoting both environmental sustainability improved Key Words: Crumb Rubber Modified Bitumen (CRMB), pavement, tire recycling, construction, performance, rubberized asphalt

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This investigation fully studied optimizing the thermochemical desulfurization process for carbon black-filled styrene butadiene rubber (SBR) by examining black type effect and loading amount on performance. The analysis of devulcanization efficiency required Horikx-Verbruggen method to evaluate sol fraction crosslink density relationships. When higher amounts are present, speed crosslinking interactions increases. An increase in rate reached 170% N-330, while N-550 showed an 87% such rates. size particles N-330 does not impact performance results. researchers optimized procedures using temperature time variations as critical variables. study results indicate that reduced combined with shorter periods helps minimize formation, improving aggregation behavior system becomes more pronounced when high-temperature conditions prevail, thus it impacts operations outcome. demonstrates necessity match approaches compound characteristics enhanced product properties extended life span applications.

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Thermolysis process and system for recycling waste tires into high-quality recovered carbon black and fuel without post-treatment. The thermolysis system involves heating disused tires to decompose them into recovered carbon black and a liquid fuel. The resulting carbon black is of comparable quality to semi-reinforcing smoke blacks used in rubber. The fuel has a lower content of carbonaceous material compared to traditional tire pyrolysis fuels. This is achieved through the thermolysis process itself without additional post-treatment steps like distillation or catalysis.

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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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ABSTRACT The erosion and polarization effects were much more evident with the increase in plasma power for pyrolysis carbon black (CBp) arising from waste tire. However, a strong fusion effect appeared when reached 600 W. CBp400 W had best dispersion rubber matrix deepest interaction molecular chains. CBp600 worst most remarkable weak matrix. Compared NR/CBp0 W, tensile strength increased by 16.6%, DIN abrasion volume decreased 8.1% NR/CBp400 Its coefficient of friction (COF) resistance enhanced 22.6%/56.5% (7 N : 0.25 m/s), 13.5%/30.1% 0.5 7.6%/28.8% (14 20.3%/34.1% m/s) under dry conditions. steady COF 53% compared wet conditions, regulation was accordance that tan at 0C detected dynamic mechanical measurement. In this work, it proved 400 optimized power. Filler fillerpolymer crucial factors enhancing resistance. Additionally, research introduced novel approach assessing wetslip materials.

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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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A thermolysis process and system for recycling old tires to produce high quality recovered carbon black and fuel that avoids the need for post-treatment steps like distillation or catalysis. The process involves thermolysis of tires to yield a fuel with lower carbon content compared to conventional methods. The fuel is amber to brown in color instead of black. The recovered carbon black has similar properties to semi-reinforcing smoke blacks used in rubber. This is achieved without further processing, unlike existing methods that require distillation or catalysts to improve fuel quality.

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<title>Abstract</title> The extensive production and consumption of ground tire rubber (GTR) have led to a significant accumulation waste, posing substantial environmental challenge. To enhance the recycling efficiency GTR, this work introduces an innovative plasma-assisted method utilizing dielectric barrier discharge (DBD) technology for devulcanization. Experimental results demonstrate that, after plasma treatment at voltage 18 kV 30 minutes, crosslink density decreased from 2.110⁴ 0.810<sup> mol/cm³, gel content reduced 96.890.5%, indicating effective cleavage S-S C-S bonds during process. Notably, corresponding tensile strength elongation break plasma-regenerated reached 10.2 MPa 357.7%, respectively, meeting standards high-grade applications. Finally, plausible mechanism underlying devulcanization process is proposed. This novel approach holds promise enhancing sustainability by enabling efficient eco-friendly recycling.

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Recycled carbon black with improved properties for rubber products by modifying the surface of recycled carbon black obtained from pyrolyzing waste tires. The modification involves continuously introducing the recycled carbon black into a main burner flame and passing it through the flame. This removes rubber residuals adhering to the carbon black surface. The burner flame conditions are optimized to maintain low oxygen levels during combustion. The modified carbon black has lower rubber impurities and higher bonding with rubber components compared to unmodified recycled carbon black.

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Abstract. The disposal of waste tires has become a substantial environmental challenge attributed to their accumulation and potential hazards. Pyrolysis emerges as viable approach for the valorization tires, into valuable products such pyrolytic char. This carbon-rich char can be effectively used pollutant removal or further processed activated carbon, which is widely utilized in purification catalytic applications. study explores impact pyrolysis temperature zeolite catalyst dosage on yield carbonous materials from degradation derived pyrolysis. Firstly, slow at 500C 3 hours yielded 60% solid Subsequently, was subjected temperatures varying 600C 800C ranging 0 1.5. findings discovered diverse patterns carbon with increasing across temperatures. At 800C, linear rise 80% 71% noted dosage, coke formation surface catalyst. Conversely, 700C 600C, reduced 88% 68% 85% 65%, respectively, potentially due promotion liquid product formation. present research demonstrates significant providing insight optimizing decomposition, tire-derived carbonaceous materials.

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Abstract The closed-loop recycling of spent graphite (SG) anodes is an effective method to reduce resource consumption and address environmental issues. However, the still poor electrochemical performance regenerated anode hinders its recycling. It crucial develop green efficient repair strategies achieve upgraded waste graphite. Here, we propose vapor deposition strategy regenerate (SG). At 900, cross-linking reactions are employed construct gradient disordered carbon structures, which surface SG inhibit internal crystal rearrangement, thereby improving initial coulombic efficiency (ICE) anode, enhancing Li+transport performance, cycling stability. (PVDC@G-1) has ICE 91.2% a reversible capacity 392.5mAh/g. After 300 cycles at 1C, specific remains as high 334.5mAh/g. This realizes approach provides unique insights into regulating structure repairing defects, offering new for SG.

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Abstract Pyrolysis is becoming increasingly important in the context of recycling and volume endoflife tires worldwide. Sustainable carbon black (sCB), which produced from pyrolysis oil instead crude oil, recovered (rCB), remaining solid pyrolysis, are promising secondary raw materials for rubber compounds as a substitute industrial fossil resources. This study investigates possibility substituting N550 partially or fully an EPDM (Ethylene Propylene Diene Monomer) sealing compound. rCB contains impurities that affect properties Aging at higher temperatures, presence oxygen studied. The evaluated after heat treatment air different temperatures up to 6 weeks. results show sCB very close material terms its inrubber properties. Due impurities, alters crosslinking density structure polymersulfur network (shift polysulfidic structure). Lower reinforcement also observed, related weaker polymerfiller (decrease I 3/1 by 3% 43% vCB) fillerfiller interactions. effects more pronounced containing rCB.

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The pyrolysis carbon black (CBp) from waste tires contains zinc, iron, and other metal elements, which have high recycling value. This study proposes a simple method of recovering zinc iron tire-derived CBp to synthesize hydrotalcite-type adsorbents for the treatment anodic dye wastewater. Firstly, zinc-aluminum hydrotalcite (LDH) zinc-iron aluminum (FeLDH) were obtained by leaching ions with an acid solution. As compared LDH, FeLDH shows increased laminate ion arrangement density layer spacing. By calcining LDH at 500 C, oxides (LDO) (FeLDO) then prepared applied adsorption methyl orange (MO). results demonstrate that maximum capacity LDO FeLDO are 304.9 609.8 mg g1 pH 4.0, respectively. processes both consistent Langmuir isotherm proposed second-order kinetic model. regeneration performance mechanism also investigated in detail. Regeneration experiments show after three cycles, removal rate MO remains above 80%, while only around 64% first cycle regeneration. work would provide new pathway realize high-value solve contamination

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Continuous carbon material modification reactor and system for enhancing quality and efficiency of modifying carbon materials like carbon black, graphene, etc. The reactor uses a screw conveying device to continuously feed, turn, and process the carbon material inside multiple reactors connected in series. Ozone gas is introduced into each reactor to oxidize the carbon. Adjusting parameters like gas flow rate, screw speed, and reactor count allows optimizing modification quality and yield. The system has separate units for compressing, oxygenating, and ozone generation.

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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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