Reprocessing of used tires into activated carbon and other products

Teng, Hsisheng; Serio, Michael A.; Wójtowicz, Marek A.; Bassilakis, R.; Solomon, P.R.

doi:10.1021/ie00048a023

Cited by 159 publications

(110 citation statements)

References 13 publications

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“…Similar work on BET surface areas of activated carbon from tire char has been seen elsewhere as well. For example, Teng et al 31 reported that the tire char activated with CO 2 by thermo-gravimetric resulted in a maximum surface of 370 m 2 /g at 50% burnoff. Merchant and Petrich 30 described the conversion of tire pyrolytic char (using muffle furnace) into activated char with a surface area of 500 m 2 /g at 850°C in a nitrogen flow containing 40% steam by volume.…”

Section: Relationship Between Burnoff and Surface Areas Of Activatedmentioning

confidence: 99%

Properties of Pyrolytic Chars and Activated Carbons Derived from Pilot-Scale Pyrolysis of Used Tires

Yao

Wen

et al. 2005

Journal of the Air & Waste Management Association

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Used tires were pyrolyzed in a pilot-scale quasi-inert rotary kiln. Influences of variables, such as time, temperature, and agent flow, on the activation of obtained char were subsequently investigated in a laboratory-scale fixed bed. Mesoporous pores are found to be dominant in the pore structures of raw char. Brunauer-Emmett-Teller (BET) surfaces of activated chars increased linearly with carbon burnoff. The carbon burnoff of tire char achieved by carbon dioxide (CO 2 ) under otherwise identical conditions was on average 75% of that achieved by steam, but their BET surfaces are almost the same. The proper activation greatly improved the aqueous adsorption of raw char, especially for small molecular adsorbates, for example, phenol from 6 to 51 mg/g. With increasing burnoff, phenol adsorption exhibited a first-stage linear increase followed by a rapid drop after 30% burnoff. Similarly, iodine adsorption first increased linearly, but it held as the burnoff exceeded 40%, which implied that the reduction of iodine adsorption due to decreasing micropores was partially made up by increasing mesopores. Both raw chars and activated chars showed appreciable adsorption capacity of methylene-blue comparable with that of commercial carbons. Thus, tire-derived activated carbons can be used as an excellent mesoporous adsorbent for larger molecular species.

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Section: Relationship Between Burnoff and Surface Areas Of Activatedmentioning

confidence: 99%

Properties of Pyrolytic Chars and Activated Carbons Derived from Pilot-Scale Pyrolysis of Used Tires

Yao

Wen

et al. 2005

Journal of the Air & Waste Management Association

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“…Otros investigadores como Ogasawara et al (1987), y Lehmann et al (1998), obtuvieron rendimientos entre 4-9% utilizando H2O como agente activante, mientras que Teng et al (1995) reportó rendimientos de 16% activando con CO2. Dichos valores están por debajo del rendimiento obtenido en esta investigación el cual fue de 22%, lo cual demuestra la influencia del agente activante y la materia prima en el proceso de activación.…”

Section: Resultados Degradación Termoquímicaunclassified

“…Investigadores como Lehmann et al (1998), Ogasawara et al (1987), Teng et al (1995) buenas características de porosidad a partir de neumáticos usados sin etapa previa de desvolatilización. En sus experimentos, el proceso de activación de los neumáticos fue realizado variando los tiempos de residencia, la temperatura de la reacción y los flujos del agente gasificante (H2O y/o el CO2).…”

Section: Introductionunclassified

Transformación termoquímica de neumáticos usados en una sola etapa en atmósfera de CO2 para la obtención de carbón activado y comparación con el obtenido en dos etapas

Cardona

Betancur

Martínez

2015

RIA

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Resumen: Este trabajo muestra la producción de Carbón Activado (CA) por medio de la degradación termoquímica sin tratamiento previo de desvolatilización (una etapa) de neumáticos usados en un reactor de lecho fijo empleando como agente de activación CO2. El CA obtenido fue caracterizado a partir de los análisis elemental e inmediato, área superficial BET, porosimetría de mercurio, microscopia electrónica de barrido (SEM) y el método de Boehm para la determinación de grupos funcionales superficiales. Asimismo, se investigó la capacidad de adsorción del CA a través de una prueba de adsorción de níquel. Bajo las condiciones de transformación termoquímica implementadas (900° de temperatura, 100 mL/min de CO2 y 180 min de tiempo de reacción), la conversión del neumático en CA fue del 78%, presentando un área superficial BET de 418 m 2 /g y una estructura de tipo mesoporosa. Con respecto a los resultados de adsorción, se obtuvo una remoción del 50% de ion metálico de níquel en solución acuosa, a temperatura de 28°C, pH de 6, tiempo de contacto 24 horas y velocidad de agitación de 150 rpm. Finalmente se realizó una comparación con los resultados obtenidos en un proceso de dos etapas (pirólisis y activación), encontrándose que en ambos carbones la porosidad y el área superficial son similares. Lo anterior permite afirmar sobre la potencialidad del proceso de activación sin etapa previa de desvolatilización dada las menores etapas involucradas en la producción para obtener un CA con propiedades atractivas para ser usado en procesos de adsorción.Palabras Clave: Adsorción, degradación termoquímica, carbón activado, neumáticos usados, porosidad. THERMOCHEMICAL TRANSFORMATION OF WASTE TIRES IN ONE STEP BY USING CO2 FOR THE PRODUCTION OF ACTIVATED CARBON AND THE COMPARISON WITH THAT OBTAINED IN TWO STEPSAbstract: This work shows the production of activated carbon (AC) from waste tires by thermochemical degradation without previous treatment of devolatilization (one stage) in a fixed bed reactor using CO2 as activation agent. The adsorptive capacity of the carbon was investigated through nickel adsorption and different characterization techniques such as elemental and immediate analyses, BET surface area, mercury porosimetry, scanning electron microscopy (SEM) and the Boehm method in order to identify the superficial functional groups. The conversion of the waste tire on activated carbon was 78% for a reaction temperature of 900°C, a volumetric flow rate of CO2 of 100 mL/min and a reaction time of 180 minutes. Under these conditions the resulting AC showed a BET area surface of418 m 2 /g and a pore structure predominately mesoporous. Regarding to adsorption results it was found a removal of 50% of the nickel metal ion in aqueous solution. The adsorption conditions were 28°C, pH 6, soaking time of 24 hours and a stirring rate of 150 rpm. Finally, a comparison with the results obtained in a two stages process (pyrolysis and activation) showed that in both ACs the porosity and the surface area are similar. This fact suggest about...

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“…[73]. Table 8 presents some literatures on the generation of activated carbon from waste tyre pyrolysis [74][75][76]. Compared to carbon August, 2016…”

Section: Carbon Blackmentioning

confidence: 99%

Influence of process conditions on product yield of waste tyre pyrolysis- A review

Parthasarathy

Choi

Park

et al. 2016

Korean J. Chem. Eng.

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Abstract−Waste tyres have become a grave concern as their accumulation is aggregating every year. Not only the size of waste tyre has to be reduced, but also some useful energy has to be recovered out of it as the world badly requires energy from alternate sources. Pyrolysis is one such method to extract energy potential products from waste tyres. It is extensively used to generate carbon black (solid product), tyre-oil (liquid product) and syngas (gas product) from waste tyres. In that connection, this article discusses the effect of various parameters on the product composition of pyrolysis of waste tyres. The current usage of pyrolysis products and their typical characteristics are also discussed in this critique. Of late, extraction of high value added products, such as activated carbon from carbon black, and limonene from tyre-oil is gaining attention. The article also throws some light on the application and generation routes of activated carbon and limonene from waste tyres.

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Reprocessing of used tires into activated carbon and other products

Cited by 159 publications

References 13 publications

Properties of Pyrolytic Chars and Activated Carbons Derived from Pilot-Scale Pyrolysis of Used Tires

Properties of Pyrolytic Chars and Activated Carbons Derived from Pilot-Scale Pyrolysis of Used Tires

Transformación termoquímica de neumáticos usados en una sola etapa en atmósfera de CO2 para la obtención de carbón activado y comparación con el obtenido en dos etapas

Influence of process conditions on product yield of waste tyre pyrolysis- A review

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