Conversion of Waste Tyres into Carbon Black and their Utilization as Adsorbent

Abstract

Pyrolysis has the potential of transforming used tyres into useful recyclable products. Pyrolytic carbon black is one of the most important products of tyre pyrolysis. Waste tyres were pyrolysed at 450°C in a batch reactor under atmospheric pressure. The recovered pyrolytic carbon black residues were studied to investigate their characteristics for use as a possible adsorbent. EDX elemental analysis and surface area determinations were used to investigate the distinctive features of pyrolytic carbon black. Due to various inorganic additives of the original tyre that contaminated the carbon black obtained, it was treated with acid for demineralization. The demineralized carbon black was activated at 900°C in a furnace. It was observed that acid treatment and activation increased the surface areas and decreased the concentration of contaminants. Furthermore, adsorption characteristics of methylene blue on acid-treated and activated carbon black (prepared via acid treatment) were compared with those of commercial activated carbon in liquid phase adsorption. It was found that adsorption capacity of methylene blue on acid-treated activated carbon black was greater.

Zinc Regarding the Utilization of Waste Tires by Pyrolysis

“…The high volatility of zinc is exploited practically in the industrial production of metallic zinc, where zinc ore (containing ZnO) is heated in the presence of coke, and metallic zinc evolves as a vapour. We compared our results to another study presented in the literature [10][11][12][13], which confirmed the high zinc content in the bare postpyrolysis char from tires (4.2 wt. %).…”

“…Table 2 proves that the sulphur content in the investigated char is low. Additionally, our XRD investigations did not reveal the presence of ZnS in the char, as found in other studies [11][12][13]. High content of sulphur (also as ZnS) could considerably limit the utilization of such a sulphur-rich char by combustion.…”

Agricultural bio-waste materials as potential sustainable precursors used for activated carbon production: A review

“…Activated carbon has many applications including water treatment [172,173], chemical and petroleum industries [91], separation, purification [174], catalysis [101,175], energy storage [159], batteries, fuel cells [176], nuclear power stations [177], electrodes for electric double layer capacitors [178], pharmaceutical [163], hydrometallurgy [104,179] and others.…”

Combustion, performance and emission of a diesel engine fuelled with diesel doped with carbon black

“…The fed tyres are heated up in the absence of oxygen [19]. The process is carried out at a temperature range of 450e500 C. The volatile vapour evolved in the reactor is condensed in a water cooled condenser.…”