Effect of acid catalysts on scrap tyre pyrolysis under fast heating conditions

Olazar, Martı́n; Arabiourrutia, Miriam; López, Gartzen; Aguado, Roberto; Bilbao, Javier

doi:10.1016/j.jaap.2008.03.006

Cited by 50 publications

(25 citation statements)

References 38 publications

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“…Furthermore, the production of isoprene from the pyrolysis of dipentene has also been demonstrated by Davis et al [35]. The fact that maximum isoprene concentrations have been reported at slightly higher pyrolysis temperatures than those for maximum dipentene yields, could be a result of this latter reaction [36][37][38][39]. Thus, as the fragmentation and aromatization of dipentene under pyrolytic conditions seems proven, the decrease of the dipentene yields at higher temperatures is either solely due to these reactions, or due to the combination of them with competitive fragmentation of the main polyisoprene polymer.…”

Section: Reaction Mechanismmentioning

confidence: 74%

“…Actually, about double amounts of dipentene are obtained at 400 and 500 • C [53]. There seems to be a maximum in the dipentene yield within the temperature range 400-500 • C. This maximum is reported at 400 [53], 425 [36,39], 450 [14,37,54], 475 [30], or 500 • C [46] for the different studies. The variation in this temperature for maximum dipentene yield is mainly due to the influences of the other governing variables.…”

Section: Refmentioning

confidence: 84%

“…Furthermore, this catalytic behavior holds both for studies where a separate catalytic bed was used [37,[49][50][51][65][66][67], and for studies where the catalyst was present in the pyrolysis reactor itself (in-situ) [37,[68][69][70]. Apart from these acidic catalysts, only a few other catalysts have been investigated, see Table 6.…”

Section: Refmentioning

confidence: 99%

“…Most of these studies use acidic catalysts (various types of zeolites), see Table 5 [31,37,[49][50][51][65][66][67][68][69][70]. Generally, the objective (and the result) of the usage of this type of catalyst is an increase in the yield of single-ring aromatics.…”

Section: Refmentioning

confidence: 99%

See 3 more Smart Citations

A review of dipentene (dl-limonene) production from waste tire pyrolysis

Danon

Gryp

Schwarz

et al. 2015

Journal of Analytical and Applied Pyrolysis

161

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Section: Reaction Mechanismmentioning

confidence: 74%

Section: Refmentioning

confidence: 84%

Section: Refmentioning

confidence: 99%

Section: Refmentioning

confidence: 99%

See 2 more Smart Citations

A review of dipentene (dl-limonene) production from waste tire pyrolysis

Danon

Gryp

Schwarz

et al. 2015

Journal of Analytical and Applied Pyrolysis

161

View full text Add to dashboard Cite

“…The main pyrolytic products of used tires are pyrolytic oil, pyrolytic gas and pyrolytic carbon black (PCB). Many scholars [2][3][4][5][6][7][8] home and abroad have studied the pyrolysis technology and characterized the properties of PCB. Many researchers [9][10][11] investigated the specific surface area and porosity of PCB.…”

Section: Introductionmentioning

confidence: 99%

The effect of pyrolytic carbon black prepared from junked tires on the properties of ethylene-propylene-diene copolymers (EPDM)

Du¹,

Zhang²,

Wu³

2009

Express Polym. Lett.

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Abstract. Pyrolytic carbon black (PCB) made from used tires was used in ethylene-propylene-diene copolymers (EPDM). The microstructure of PCB was characterized by scanning electron microscopy (SEM). PCB was compounded with EPDM to prepare EPDM vulcanizates. The effects of PCB on the processing properties of EPDM compounds and the mechanical properties of vulcanizates were investigated and compared with other traditional fillers such as semi-reinforcing furnace black (N774), light calcium carbonate (CaCO3) and thermal black (N990). At the same time, the rheological behavior of EPDM compounds filled with different fillers was characterized by capillary rheometrics. The SEM photos showed that the particle shape was quiet different from that of CaCO3 and N990, it was similar to that of N774. The primary particle size was smaller than that of N774, but the aggregate size of PCB was larger than that of N774. The effect of PCB on the processing properties of EPDM compounds was similar to that of other fillers. Among the four fillers, PCB imparted EPDM compounds with higher Mooney viscosity. With the increase of filler content, the scorch time and optimum curing time of EPDM compounds changed little. The reinforcing effect of PCB was similar to that of N990, but inferior to that of N774. With the increase of PCB content, tensile strength, tear strength, and modulus at 100% elongation of EPDM vulcanizates increased significantly. When EPDM was filled with 50 phr PCB, the tear strength of EPDM vulcanizates increased by 3 times, compared with that of EPDM gum vulcanizates. The appearance of EPDM extrudate filled with PCB was coarser than that of other fillers.

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Waste Tire Pyrolysis for the Production of Light Hydrocarbons over Layered Catalysts

Leng

Wang

et al. 2015

Energy Tech

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The pyrolysis of tire waste has attracted widespread attention because valued chemicals (for example aromatic, benzene‐based compounds) can be produced during this process. In this work, a layered catalyst was applied to waste tire pyrolysis to obtain high selectivity for light hydrocarbons (benzene, toluene, xylene, and ethylbenzene). The process was performed in fixed‐bed reactor. The layered catalyst was composed of separate layers of HZSM‐5 (a zeolite‐based catalyst) in the bottom layer and ZnO in the top layer mixed with the tire waste. The layered catalysts showed better performance in the selective production of light hydrocarbons (30.23 %), compared to mixed catalysts and ZnO alone. HZSM‐5 played an important part in secondary cracking of pyrolysis vapors to produce light hydrocarbons. HZMS‐5 could be reused several times and achieve high selectivity of light hydrocarbons over mixture catalysts of regenerated and fresh HZSM‐5 (1:1), and this is proposed a feasible way to achieve successive production.

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Effect of acid catalysts on scrap tyre pyrolysis under fast heating conditions

Cited by 50 publications

References 38 publications

A review of dipentene (dl-limonene) production from waste tire pyrolysis

A review of dipentene (dl-limonene) production from waste tire pyrolysis

The effect of pyrolytic carbon black prepared from junked tires on the properties of ethylene-propylene-diene copolymers (EPDM)

Waste Tire Pyrolysis for the Production of Light Hydrocarbons over Layered Catalysts

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