2021
DOI: 10.1016/j.eti.2021.101455
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Thermal and catalytic pyrolysis of waste polypropylene plastic using spent FCC catalyst

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Cited by 72 publications
(29 citation statements)
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“…Figure 3 shows the influence of temperature on the yield of the pyrolysis products, where it is evident that the formation of solid residues is favored at low temperatures (≤350 °C), while at high temperatures (≈450 °C) gaseous products are favored since the fractionation of the macromolecule results in obtaining low molecular weight molecules by increasing the temperature of the process [ 24 ]. As for the liquid products at low temperatures, they present a percentage of liquids close to 50% that, when the temperature increases, suffer a decrease, and in addition, the pyrolytic oils of the condensable phase visually appear as an oily fluid with a penetrating odor and a brown coloration at temperatures higher than 400 °C, while at 300 °C and 350 °C they appear as a higher viscosity fluid which at room temperature forms precipitates with a waxy appearance and an amber color [ 25 ].…”
Section: Resultsmentioning
confidence: 99%
“…Figure 3 shows the influence of temperature on the yield of the pyrolysis products, where it is evident that the formation of solid residues is favored at low temperatures (≤350 °C), while at high temperatures (≈450 °C) gaseous products are favored since the fractionation of the macromolecule results in obtaining low molecular weight molecules by increasing the temperature of the process [ 24 ]. As for the liquid products at low temperatures, they present a percentage of liquids close to 50% that, when the temperature increases, suffer a decrease, and in addition, the pyrolytic oils of the condensable phase visually appear as an oily fluid with a penetrating odor and a brown coloration at temperatures higher than 400 °C, while at 300 °C and 350 °C they appear as a higher viscosity fluid which at room temperature forms precipitates with a waxy appearance and an amber color [ 25 ].…”
Section: Resultsmentioning
confidence: 99%
“…PP was converted to liquid products with a yield of 82 wt.% and coke deposit of 1.2 wt.%. Eki Tina Aisien et al 36 conducted pyrolysis of waste PP plastic using a batch reactor at the highest temperature of 400°C, with a rate of 15°C/min. By using the FCC catalyst, the product yields of liquid oil and char were 83.3 wt.% and 3.0 wt.%, respectively, while the catalytic pyrolysis had liquid oil and char yields of 77.6 wt.% and 2.7 wt.%, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…(R. Miandad et al, 2016) In the catalytic pyrolysis of polyole ns such as polyethylene (PE) and PP, studied between 420 to 510 •C (Abbas-Abadi et al, 2014), the researchers found that the yield was 92.3% for the highest liquid fraction at 450°C. While Aisien et al (Aisien et al, 2021) reported a liquid fraction of 83.3% using FCC catalysts in PP pyrolysis at different temperatures and 77.6% using FCC spent catalyst at 450°C. The in uence of the catalysts on the obtained fractions depends on the porous surface of the catalyst and its acidity.…”
Section: Introductionmentioning
confidence: 98%