Catalytic pyrolysis of waste packaging polyethylene using AlCl3-NaCl eutectic salt as catalyst

Su, Ji; Fang, Changqing; Yang, Mannan; Chen, You; Lin, Qilang; Zhou, Xing; Li, Hang

doi:10.1016/j.jaap.2019.02.015

Cited by 28 publications

(12 citation statements)

References 35 publications

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“…Most homogeneous catalysts for polyolefin degradation have been classical Lewis acids such as AlCl 3 . On the basis of these considerations, Su and coworkers [167] worked on AlCl 3 -NaCl eutectic salt as a catalyst, allowing a reduction in reaction temperature, an increase in reaction rate, a reduction in heavy oil components, and the inhibition of polyolefin formation.…”

Section: Pyrolysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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Today, the scientific community is facing crucial challenges in delivering a healthier world for future generations. Among these, the quest for circular and sustainable approaches for plastic recycling is one of the most demanding for several reasons. Indeed, the massive use of plastic materials over the last century has generated large amounts of long-lasting waste, which, for much time, has not been object of adequate recovery and disposal politics. Most of this waste is generated by packaging materials. Nevertheless, in the last decade, a new trend imposed by environmental concerns brought this topic under the magnifying glass, as testified by the increasing number of related publications. Several methods have been proposed for the recycling of polymeric plastic materials based on chemical or mechanical methods. A panorama of the most promising studies related to the recycling of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) is given within this review.

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Section: Pyrolysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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“…Miandad et al, 2017) This behaviour is assumed to be due to the in uence of the catalyst when the radicals are produced in the initiation and propagation process of reaction. [28,29] In the pyrolysis developed without catalyst, the GC analysis shows that the saturated and unsaturated aliphatic components are the main products and less than 1% of the whole products are aromatic compounds (Fig. 5b).…”

Section: Catalytic Pyrolysismentioning

confidence: 98%

“…The tendency of the degradation curve and temperature using catalysts evidence that in low temperature the gas production is greater so that is why the solid fraction has been reduced. [27][28][29] The results in TGA give a guideline to use in future experiments the applied conditions in this test (batch reactor).…”

Section: Characterization Of the Regenerated Catalyst By Betmentioning

confidence: 99%

“…One of the characteristics of catalysts is their acidity, which depends on Si/Al ratio and it allows the evaluation of their catalytic activity. However, lanthanum can be impregnated in the catalyst support to improve its operating properties (resistance to wear and operating temperature), consequently modifying the acidity but this modi cation helps in the breakdown of high molecular weight molecules (Su et al, 2019;Zhou et al, 2020).…”

Section: Characterization Of the Regenerated Catalyst By Betmentioning

confidence: 99%

“…For example, Ding et al, studied the solvent method to remove sulphur using carbon disul de, ethanol and benzene as solvents, [9,10] the results showed better yield with carbon disul de followed by ethanol. Another method to remove sulphur and carbon is by the gasi cation of catalysts at 450°C (Su et al, 2019), where they are satisfactory converted into sulphur dioxide and carbon dioxide. The leaching process is another interesting method for this purpose, lanthanum for example, is a catalyst that can be recovered applying acidic leaching followed by a heat treatment at 750°C (Zhao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Catalytic pyrolysis of recycled polypropylene using a regenerated FCC catalyst

Palmay

Medina

Donoso

et al. 2022

Preprint

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The increasing generation of plastic wastes forces us to search for final disposal technologies. Pyrolysis becomes an interesting technique in the last few years because it takes advantage of the wastes obtaining important products. Moreover, catalytic pyrolysis develops a great selectivity in the products so, the recovered of catalysts from other processes gain significant interest. In this study, we report the evaluation of the catalytic pyrolysis carried out in a batch reactor with a regenerated FCC catalyst using thermogravimetry (TGA). The regeneration studies were carried using two solvents (ethanol and toluene) at different contact times, then a thermal regeneration at two heating ramps was developed. The catalysts were characterized by SEM-EDS and BET, then used to compare with a commercial catalyst in the pyrolysis process in a 1:10 ratio (catalyst-plastic). The catalytic pyrolysis of polypropylene (PP) was carried out at 450 °C, and the products were quantified. The results showed a better solvent action of the ethanol in 14 hours of contact and longer gasification. The degradation process using recovered catalyst decreases the degradation temperature compared to the no-catalyst process. As a consequence, the yield of the liquid fraction decreases by 10% with greater orientation to aliphatic components.

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Synthesis of Modified River Clay Catalyst for Valuable BTE Production via Catalytic Pyrolysis of Hazardous Plastic Waste

Verma,

Pramanik

2023

ChemistrySelect

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In the present study, silica‐alumina rich river clay calcined at different temperatures are used as low cost natural green catalyst for the production of valuable aromatics benzene, toluene and ethylbenzene (BTE) via multiphase/Mp‐type catalytic pyrolysis of waste expanded polystyrene (WEPS). The calcined river clay catalysts are designated as RHC‐600, RHC‐700, RHC‐800 and RHC‐900 after calcination at the temperature of 600 °C, 700 °C, 800 °C, and 900 °C, respectively. Whereas, the natural river harvested clay is designated as RHC. The RHC‐800 catalyst is found to be the best catalyst for the WEPS pyrolysis due to its highest surface area of 18.83 m2/g and high silica to alumina (Si/Al) ratio of 2.23 among all other river harvested clay catalysts. The styrene content get reduced from 84.74 wt.% to 65.30 wt.% and BTE content increased from 11.38 wt.% to 23.51 wt.% when the process is switched over from thermal to Mp‐type catalytic pyrolysis using RHC‐800 catalyst. The promising results of RHC‐800 indicate that it can be an alternative to commercial catalyst for pyrolysis applications.

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Catalytic pyrolysis of waste packaging polyethylene using AlCl3-NaCl eutectic salt as catalyst

Cited by 28 publications

References 35 publications

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Catalytic pyrolysis of recycled polypropylene using a regenerated FCC catalyst

Synthesis of Modified River Clay Catalyst for Valuable BTE Production via Catalytic Pyrolysis of Hazardous Plastic Waste

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