Effect of catalyst properties on the cracking of polypropylene pyrolysis waxes under FCC conditions

Arandes, José M.; Torre, Iker; Azkoiti, Miren J.; Castaño, Pedro; Bilbao, Javier; Lasa, Hugo de

doi:10.1016/j.cattod.2007.12.080

Cited by 43 publications

(26 citation statements)

References 12 publications

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“…Pyrolysis does not pursue H2 production, but the pyrolysis volatiles can be subsequently valorized towards H2 in another step, and thus H2 production can benefit from the advances made in studies on the technology of plastics pyrolysis [43]. Pyrolysis of polyolefins at low temperature (500 ºC) allows the selective production of pyrolysis waxes (C21+) which can be fed into refinery units such as the catalytic cracker or the catalytic reformer, alone or together with the regular feed [36,[44][45][46]. The flexibility of pyrolysis processes also allows the co-treatment of plastic blends together with other materials, such as biomass [47].…”

Section: Introductionmentioning

confidence: 99%

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Ochoa

Bilbao

Gayubo

et al. 2020

Renewable and Sustainable Energy Reviews

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346

158

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Section: Introductionmentioning

confidence: 99%

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Ochoa

Bilbao

Gayubo

et al. 2020

Renewable and Sustainable Energy Reviews

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346

158

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“…The effect of process operating conditions (temperature and contact time) is significant. Catalyst acidity has a significant effect on conversion and on yields and compositions of lumps (Arandes et al, 2008). PP was cracked catalytically in the presence of kaolin and silica-alumina in a semi-batch reactor in the temperature range 400-550°C in order to obtain suitable liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conversion of waste polypropylene to liquid fuel using acid-activated kaolin

Panda

Singh

2014

Waste Manag Res

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Waste polypropylene was subjected to thermal degradation in the presence of kaolin and acid-treated kaolin, with different catalyst-to-plastics ratios, in a semi-batch reactor at a temperature range of 400-550°C to obtain optimized process conditions for the production of liquid fuels. The effects of process temperature, catalyst and feed composition on yield and quality of the oil were determined. For a thermal decomposition reaction at up to 450°C, the major product is volatile oil; and the major products at a higher temperature (475-550°C) are either viscous liquid or wax. The highest yield of condensed fraction in the thermal reaction is 82.85% by weight at 500°C. Use of kaolin and acid-treated kaolin as a catalyst decreased the reaction time and increased the yield of liquid fraction. The major product of catalysed degradation at all temperatures is highly volatile liquid oil. The maximum oil yield using kaolin and acid-treated kaolin is 87.5% and 92%, respectively, at 500°C. The oil obtained was characterized using GC-MS for its composition and different fuel properties by IS methods.

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“…Specifically, these authors observed a higher yield of light cycle oil (LCO) at the expense of slightly faster coke formation with the blend. Regarding streams derived from the consumer society (ii), waste polyolefins have an ideal composition as FCC feedstock and their valorization can be carried out by either dissolving the polymer in the feed [14,15] or performing a previous pyrolysis [16][17][18][19]. Lovás et al [20] compared the catalytic cracking in FCC conditions of high-density polyethylene (HDPE) and polypropylene (PP) waxes together with VGO and it was concluded that PP should be used preferentially in order to boost gasoline production.…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Reaction Network for the Fluid Catalytic Cracking of Waste Feeds

et al. 2018

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Establishing a reaction network is of uttermost importance in complex catalytic processes such as fluid catalytic cracking (FCC). This step is the seed for a faithful reactor modeling and the subsequent catalyst re-design, process optimization or prediction. In this work, a dataset of 104 uncorrelated experiments, with 64 variables, was obtained in an FCC simulator using six types of feedstock (vacuum gasoil, polyethylene pyrolysis waxes, scrap tire pyrolysis oil, dissolved polyethylene and blends of the previous), 36 possible sets of conditions (varying contact time, temperature and catalyst/oil ratio) and three industrial catalysts. Principal component analysis (PCA) was applied over the dataset, showing that the main components are associated with feed composition (27.41% variance), operational conditions (19.09%) and catalyst properties (12.72%). The variables of each component were correlated with the indexes and yields of the products: conversion, octane number, aromatics, olefins (propylene) or coke, among others. Then, a data-driven reaction network was proposed for the cracking of waste feeds based on the previously obtained correlations.

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Effect of catalyst properties on the cracking of polypropylene pyrolysis waxes under FCC conditions

Cited by 43 publications

References 12 publications

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review

Conversion of waste polypropylene to liquid fuel using acid-activated kaolin

A Data-Driven Reaction Network for the Fluid Catalytic Cracking of Waste Feeds

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