Waste tyre pyrolysis – A review

“…Waste tyres fall under the general waste category. About 1.4 billion tyres are sold worldwide each year [7]. In South Africa, approximately 11 million tyres are currently sold and 275 000 tonnes of these tyres become waste.…”

Section: A Waste Tyre Managementmentioning

confidence: 99%

“…Waste tyres can also be used as secondary fuel in thermal power plants to reducing coal usage and NO x emissions [7]. Waste tyre pyrolysis produces oil, gas and carbon black.…”

Section: E Recoverymentioning

confidence: 99%

Waste Tyre Management in Gauteng, South Africa: Government, Industry and Community Perceptions

Muzenda¹,

Popa²

2015

IJESD

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Abstract-Waste tyres have accumulated at landfills in South Africa, some are illegally dumped in open spaces or sold. This work discusses the waste tyre problem in South Africa as well as the environmental and economic benefits of waste tyre utilization for green fuels. The perceptions of government, industry and community on waste tyre management were investigated. To achieve the objectives a triangulation procedure was followed. This included personnel interviews, questionnaires and literature analysis. The research has shown that lack of knowledge particularly in the informal sector contributed to the waste tyre management problem. The lack of clear and focused legislation guiding the disposal and recycling of waste tyres remains a challenge. Pyrolysis was found to have the potential to address the waste tyre problem with the potential to reduce environmental impact and also contribute towards a green economy.

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“…Relative to the co-pyrolysis of biomass with plastics, approximately 1.5 billion tires are produced worldwide annually, and they are eventually treated as waste (Williams 2013). Waste tires, which are primarily composed of rubber and carbon black, have been applied to industrial pyrolysis for producing around 63 wt.% liquid yield with high caloric value that resulted from a high H/C atomic ratio containing a low oxygen content, and aromatic and aliphatic compounds (Martínez et al 2013;Quek and Balasubramanian 2013). A recent study has shown that the addition of waste tires into biomass materials during pyrolysis can be conducive to the improvements in the oils quality and quantity as a result of a synergistic effect in existence via free radical interactions (Martínez et al 2014;Uçar and Karagöz 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermal and Kinetic Behaviors of Fallen Leaves and Waste Tires Using Thermogravimetric Analysis

et al. 2017

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Thermal decomposition characteristics and kinetic parameters of fallen leaves (FLs), waste tires (WTs), and their blends (1:1 weight ratio) were investigated. Pyrolysis experiments were conducted with four different heating rates of 5 °C/min, 10 °C/min, 20 °C/min, and 40 °C/min from 35 °C to 800 °C in a nitrogen atmosphere using a thermogravimetric analysis (TGA). The thermogravimetry/derivative thermogravimetry (TG/DTG) curves indicated that the three samples were mainly degraded in a wide temperature range of 350 °C to 450 °C, and that a greater weight loss rate corresponded to a higher heating rate. An elemental analysis demonstrated that FLs/WTs blends embraced a maximum calorific value that reached 25.24 MJ/kg. Two model-free methods, iso-conversional Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) were applied on the TGA data of samples to calculate the activation energies. The results showed that the average activation energies of the same feedstock based on KAS and FWO methods were approximately the same, with the highest error within 1.6%. Then, the activation energies obtained were introduced in the Coats/Redfern (CR) model-fitting method to derive the pre-exponential factors, based on first order rate of reaction.

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Waste tyre pyrolysis – A review

Cited by 709 publications

References 155 publications

Fuel-oils from co-pyrolysis of scrap tyres with coal and a bituminous waste. Influence of oven configuration

Fuel-oils from co-pyrolysis of scrap tyres with coal and a bituminous waste. Influence of oven configuration

Waste Tyre Management in Gauteng, South Africa: Government, Industry and Community Perceptions

Thermal and Kinetic Behaviors of Fallen Leaves and Waste Tires Using Thermogravimetric Analysis

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