Heat-treatment of carbon blacks obtained by pyrolysis of used tires. Effect on the surface chemistry, porosity and electrical conductivity

Pantea, Dana; Darmstadt, Hans; Kaliaguine, Serge; Roy, Christian

doi:10.1016/s0165-2370(02)00017-7

Cited by 92 publications

(68 citation statements)

References 35 publications

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“…The surface area of N550 and CBp was 42 and 30.4 m 2 /g, respectively. The lower surface area of the CBp was most probably due to a blockage of a portion of the carbon black surface by carbonaceous deposits [22,23]. The sulfur content of approximately 1.45% is consistent with literature [6,13,24] reports.…”

Section: Results and Discussion 31 Characterization Of The Pyrolytisupporting

confidence: 87%

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Influence of pyrolytic carbon black and pyrolytic oil made from used tires on the curing and (dynamic) mechanical properties of natural rubber (NR)/styrene-butadiene rubber (SBR) blends

Karabörk¹,

Tipirdamaz²

2016

Express Polym. Lett.

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Abstract. Pyrolytic carbon black (CBp) and pyrolytic oil (Op) made from used tires were used in natural rubber (NR)/ styrene-butadiene rubber (SBR) blends. The effects of CBp and Op on the processing properties, the mechanical properties and the dynamic mechanical properties of the NR/SBR blends were investigated and compared with a control sample that was prepared with N550 and commercial process oil. It was found that the effect of CBp on the processing properties of the NR/SBR blends was similar to that of N550. With the increase of the CBp content, the curing properties of the NR/SBR blends changed little. The reinforcing effect of CBp was inferior to that of N550. With the increase of the CBp content, the tensile strength, tear strength and modulus at 100% elongation of the NR/SBR vulcanizates decreased significantly. Dynamic mechanical properties of the NR/SBR blends were also affected and all samples comprising CBp have a higher tan ! than control sample. It is suggested that the low surface area and high ash content of CBp strongly effects all of these property changes of the NR/SBR blends. The morphology and distribution of the carbon black particles are studied using a scanning electron microscope. It was also found that with the increase of the Op content, the properties of the NR/SBR blends were strongly affected due to the high sulfur content of Op, which produced a high crosslinking density.

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Section: Results and Discussion 31 Characterization Of The Pyrolytisupporting

confidence: 87%

“…The surface morphology of the commercial carbon black shows a rough surface. CBp has a smooth surface due to the deposition of ash and carbonaceous deposits on the surface [22,23]. The pyrolytic oil was characterized, and the results are presented in Table 3.…”

Section: Results and Discussion 31 Characterization Of The Pyrolytimentioning

confidence: 99%

Influence of pyrolytic carbon black and pyrolytic oil made from used tires on the curing and (dynamic) mechanical properties of natural rubber (NR)/styrene-butadiene rubber (SBR) blends

Karabörk¹,

Tipirdamaz²

2016

Express Polym. Lett.

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“…There have been many studies investigating the properties of the char as a substitute carbon black (Darmstadt et al, 1995;Sahouli et al, 1996;Roy et al, 1999;Kaminsky and Mennerich, 2001;Pantea et al, 2003;Tang and Huang, 2005;Mikulova et al, 2013). The carbon black/char produced from pyrolysis of tyres differs from commercial carbon black in that the char consists of the recovered carbon black and also pyrolytic char.…”

Section: Char Characteristicsmentioning

confidence: 99%

“…Post-pyrolysis heat treatment (between 670 to 860°C) to minimise pyrolytic carbon deposition has been applied to the vacuum pyrolysis of tyres (Pantea et al, 2003). The surface chemistry of the resultant carbon blacks was changed by the secondary heat treatment producing a more polyaromatic character and the electrical conductivity of the carbons were improved to values greater than commercial carbon blacks.…”

Section: Carbon Black and Activated Carbons From Waste Tyre Pyrolysismentioning

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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“…Carbon blacks have a conductivity in the range of 0.1 to 10 S/cm at ambient temperature [6]. The electrical conductivity of carbon blacks depends on many parameters, such as their particle size (inversely proportional to the surface area), the aggregation of the carbon black particles (structure, measured as dibutyl phthalate absorption capacity) and the surface chemistry [7,8]. But, besides their high electrical conductivity, carbon black fillers are relatively have low thermal conductivity according to the other carbon materials [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermal and Electrical Conductivity Properties of Carbon Black Coated Cotton Fabrics

Gültekin

Usta

2015

Marmara Fen Bil Dergisi

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In this study, the thermal and electrical conductivity properties of carbon black coated cotton fabrics were investigated. To obtain coated cotton fabrics, first carbon black nanoparticles were dispersed in distilled water. To improve dispersion stability of water based carbon black coating solutions, anionic wetting and dispersing agent was used. Plain weaved cotton fabrics were dipped into carbon black dispersion for 5 min. Because of the strong absorption, the cotton fabric was quickly coated by the carbon black dispersion. Then, the fabric with carbon black dispersion was subsequently dried in an oven at 120°C for 10 min to remove water. The dipping-drying process was repeated for 5 times to increase the carbon black loading in cotton fabric. Different carbon black concentrations on coating process were examined. The effects of carbon black loading on thermal and electrical conductivity properties of fabrics were investigated.

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Heat-treatment of carbon blacks obtained by pyrolysis of used tires. Effect on the surface chemistry, porosity and electrical conductivity

Cited by 92 publications

References 35 publications

Influence of pyrolytic carbon black and pyrolytic oil made from used tires on the curing and (dynamic) mechanical properties of natural rubber (NR)/styrene-butadiene rubber (SBR) blends

Influence of pyrolytic carbon black and pyrolytic oil made from used tires on the curing and (dynamic) mechanical properties of natural rubber (NR)/styrene-butadiene rubber (SBR) blends

Pyrolysis of waste tyres: A review

Investigation of Thermal and Electrical Conductivity Properties of Carbon Black Coated Cotton Fabrics

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