Stability of ZSM-11 and BETA zeolites during the catalytic cracking of low-density polyethylene

Renzini, María Soledad; Lerici, Laura Carolina; Sedrán, Ulises; Pierella, Liliana B.

doi:10.1016/j.jaap.2011.08.008

Cited by 66 publications

(28 citation statements)

References 20 publications

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“…Peak decomposition temperature was established at 450 °C and complete decomposition around 494.7 °C. The decomposition characteristics are consistent with most results of LDPE samples reported in the literature[35]. The cleaning process during waste segregation removed the impurities and other contaminants, hence there is no other peaks present in the TGA result.…”

supporting

confidence: 89%

Pyrolysis of low density polyethylene waste in subcritical water optimized by response surface methodology

Wong

Amin

Abdullah

et al. 2015

Environmental Technology

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Pyrolysis of low density polyethylene (LDPE) waste from local waste separation company in subcritical water was conducted to investigate the effect of reaction time, temperature, as well as the mass ratio of water to polymer on the liquid yield. The data obtained from the study were used to optimize the liquid yield using response surface methodology. The range of reaction temperature used was 162-338°C, while the reaction time ranged from 37 min to 143 min, and the ratio of water to polymer ranged from 1.9 to 7.1. It was found that pyrolysis of LDPE waste in subcritical water produced hydrogen, methane, carbon monoxide and carbon dioxide, while the liquid product contained alkanes and alkenes with 10-50 carbons atoms, as well as heptadecanone, dichloroacetic acid and heptadecyl ester. The optimized conditions were 152.3°C, reaction time of 1.2 min and ratio of water solution to polymer of 32.7, with the optimum liquid yield of 13.6 wt% and gases yield of 2.6 wt%.

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supporting

confidence: 89%

Pyrolysis of low density polyethylene waste in subcritical water optimized by response surface methodology

Wong

Amin

Abdullah

et al. 2015

Environmental Technology

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“…The temperatures used for the process ranged in 300-900 1C, and the reaction time 30-90 min [21,29]. In case of catalytic pyrolysis, mass ratio of reactant: catalyst varied from 30:1 to 2:1 was used to increase the product yield and selectivity [21,30]. Table 1 Annual production of different plastics in 2012 [2,3].…”

Section: Batch and Semi-batch Reactormentioning

confidence: 99%

Current state and future prospects of plastic waste as source of fuel: A review

Wong

Ngadi

Abdullah

et al. 2015

Renewable and Sustainable Energy Reviews

569

240

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“…KFS-16B and B-Zeolite were prepared according to the methods reported by Yusaku et al [15] and Renzinia et al [16], respectively. Al-SBA-15(wo) was synthesized using a modified synthesis route based on the method previously reported by Bhange et al [17].…”

Section: Catalyst Preparation and Characterizationmentioning

confidence: 99%

Investigation into the Catalytic Activity of Microporous and Mesoporous Catalysts in the Pyrolysis of Waste Polyethylene and Polypropylene Mixture

Lee

Yuan

et al. 2016

Energies

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Catalytic pyrolysis behavior of synthesized microporous catalysts (conventional Zeolite Socony Mobil-5 (C-ZSM-5), highly uniform nanocrystalline ZSM-5 (HUN-ZSM-5) and β-zeolite), Mesoporous catalysts (highly hydrothermally stable Al-MCM-41 with accessible void defects (Al-MCM-41(hhs)), Kanemite-derived folded silica (KFS-16B) and well-ordered Al-SBA-15 (Al-SBA-15(wo)) were studied with waste polyethylene (PE) and polypropylene (PP) mixture which are the main constituents in municipal solid waste. All the catalysts were characterized by Brunauer-Emmett-Teller (BET), X-ray powder diffraction (XRD), and NH3-temperature programmed desorption (TPD). The results demonstrated that microporous catalysts exhibited high yields of gas products and high selectivity for aromatics and alkene, whereas the mesoporous catalysts showed high yields of liquid products with considerable amounts of aliphatic compounds. The differences between the microporous and mesoporous catalysts could be attributed to their characteristic acidic and textural properties. A significant amount of C2-C4 gases were produced from both types of catalysts. The composition of the liquid and gas products from catalytic pyrolysis is similar to petroleum-derived fuels. In other words, products of catalytic pyrolysis of plastic waste can be potential alternatives to the petroleum-derived fuels.

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Stability of ZSM-11 and BETA zeolites during the catalytic cracking of low-density polyethylene

Cited by 66 publications

References 20 publications

Pyrolysis of low density polyethylene waste in subcritical water optimized by response surface methodology

Pyrolysis of low density polyethylene waste in subcritical water optimized by response surface methodology

Current state and future prospects of plastic waste as source of fuel: A review

Investigation into the Catalytic Activity of Microporous and Mesoporous Catalysts in the Pyrolysis of Waste Polyethylene and Polypropylene Mixture

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