Recycling of scrap tires to oil and carbon black by vacuum pyrolysis

Roy, Christian; Labrecque, Blaise; Caumia, B. De

doi:10.1016/0921-3449(90)90002-l

Cited by 171 publications

(86 citation statements)

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“…The proximate and ultimate analyses (as-received basis) and the calorific value of used tires are given in Table 1. The data of Roy et al 25 are given as a comparison.…”

Section: Experimental Methodsmentioning

confidence: 99%

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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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“…The proximate and ultimate analyses (as-received basis) and the calorific value of used tires are given in Table 1. The data of Roy et al 25 are given as a comparison.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…8 -9,20 -22 Pyrolytic gas contains high concentrations of methane, butadiene, and other hydrocarbons with high calorific values. [23][24][25] Generally, the gas is used as a process heat resource instead of a commercial product because of its low yield in the pyrolysis process.…”

Section: Discussionmentioning

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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“…Vacuum pyrolysis of waste tyres has been extensively investigated by Roy and coworkers (Roy et al, 1990;Benallal et al, 1995;Roy et al, 1999;Pakdel et al, 2001. Oil yields of up to 56.5 wt.% (Pakdel et al, 2001) from waste tyre granules have been obtained using their continuous or semi-continuous pilot scale vacuum pyrolysis system.…”

Section: Other Types Of Reactormentioning

confidence: 99%

Pyrolysis of waste tyres: A review

2013

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Approximately 1.5 billion tyres are produced each year which will eventually enter the waste stream representing a major potential waste and environmental problem. However, there is growing interest in pyrolysis as a technology to treat tyres to produce valuable oil, char and gas products. The most common reactors used are fixed-bed (batch), screw kiln, rotary kiln, vacuum and fluidised-bed. The key influence on the product yield, and gas and oil composition, is the type of reactor used which in turn determines the temperature and heating rate. Tyre pyrolysis oil is chemically very complex containing aliphatic, aromatic, heteroatom and polar fractions. The fuel characteristics of the tyre oil shows that it is similar to a gas oil or light fuel oil and has been successfully combusted in test furnaces and engines. The main gases produced from the pyrolysis of waste tyres are H 2 , C 1 -C 4 hydrocarbons, CO 2 , CO and H 2 S. Upgrading tyre pyrolysis products to high value products has concentrated on char upgrading to higher quality carbon black and to activated carbon. The use of catalysts to upgrade the oil to a aromatic-rich chemical feedstock or the production of hydrogen from waste tyres has also been reported. Examples of commercial and semi-commercial scale tyre pyrolysis systems show that small scale batch reactors and continuous rotary kiln reactors have been developed to commercial scale.

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“…This reactor works at a lower temperature in comparison to fluidised-bed reactors but yields less oil [106]. Roy and colleagues conducted several vacuum tyre pyrolysis tests to investigate the products yields and quality [107][108][109][110][111]. They pyrolysed recycled scrap tyres at 415 • C and used a pressure of less than 2 kPa (absolute pressure) and developed a vacuum pyrolysis pilot plant with two different particle sizes [107].…”

Section: Vacuum Reactor Pyrolysismentioning

confidence: 99%

Scrap Tyre Management Pathways and Their Use as a Fuel—A Review

2016

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Abstract:This article provides a review of different methods for managing waste tyres. Around 1.5 billion scrap tyres make their way into the environmental cycle each year, so there is an extreme demand to manage and mitigate the environmental impact which occurs from landfilling and burning. Numerous approaches are targeted to recycle and reuse the tyre rubber in various applications. Among them, one of the most important methods for sustainable environmental stewardship is converting tyre rubber components into bio-oil. In this study, scrap tyre management techniques including landfill, retreading, recycling, combustion, and conversion to liquid fuels was reviewed (including gasification, hydrothermal liquefaction, and pyrolysis). The effects of parameters such as reactor types, pyrolysis temperature, and catalyst on the oil, gas and solid products in pyrolysis process were investigated.

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Recycling of scrap tires to oil and carbon black by vacuum pyrolysis

Cited by 171 publications

References 1 publication

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

Pyrolysis of waste tyres: A review

Scrap Tyre Management Pathways and Their Use as a Fuel—A Review

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