Catalytic degradation of polyolefins over hexagonal mesoporous silica: Effect of aluminum addition

Chaianansutcharit, Soamwadee; Katsutath, Rangson; Chaisuwan, Aticha; Bhaskar, Thallada; Nigo, Akio; Muto, Akinori; Sakata, Yusaku

doi:10.1016/j.jaap.2007.04.009

Cited by 51 publications

(26 citation statements)

References 20 publications

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“…The skewed carbon number distribution associated with KFS-16B and Al-MCM-41(hhs) observed in our studies is consistent with several studies reported previously [34,35]. On the other hand, Al-SBA-15(wo) appeared to have good selectivity for the C 13 -C 20 fraction, which is the fraction representative of diesel in terms of carbon numbers.…”

Section: Methodssupporting

confidence: 92%

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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Section: Methodssupporting

confidence: 92%

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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“…While the catalytic effect of the inorganic material in the decomposition of polymers was also observed with several zeolites [16,28,29], MCM-41 materials appear to be more active in this process, probably due to their larger pore diameters [30]. These results suggest that the recycling of the nanocomposites at the end of their lifetime service, by reutilisation in chemical processes or in the production of liquid fuels, would be more favourable [14,31]. Fig.…”

Section: Thermal Characterisationmentioning

confidence: 70%

Hybrid HDPE/MCM-41 nanocomposites: Crystalline structure and viscoelastic behaviour

Cerrada

Pérez

Lourenço

et al. 2010

Microporous and Mesoporous Materials

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a b s t r a c tPolyethylene-based nanocomposites have been prepared by in situ polymerisation of ethylene with mesostructured MCM-41 within a large range of nanofiller concentrations. The structural, thermal and viscoelastic studies have shown that the use of mesoporous MCM-41 as catalyst carrier and its further presence in the final material is an effective route for the successful attainment of nanocomposites. Data shows that minimal changes in crystallinity are observed but crystallites become thicker as MCM-41 content is raised in the nanocomposites. A confinement effect is found and a delay in the crystallisation process of the macrochains within pores and channels is observed. These novel self-reinforced nanocomposites present an enhanced rigidity, which becomes more important as temperature is raised. Accordingly, they exhibit an improved mechanical performance without varying the final processing temperature since T m is the same for all of the specimens. In agreement with other works, it is confirmed that the MCM-41 acts as promoter for polyethylene degradation, an easier degradability being observed in these nanocomposites.

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“…Nowadays, this might be quite interesting in relation to the degradation of these polyolefins into basic petrochemicals as feedstock or fuel for downstream processes after their life service, making these self-reinforced polyolefinic materials environmentally welcome and with an added value. 44 Furthermore, the amount of inorganic solids can also be estimated from these thermogravimetric curves. The contents agree rather well with those obtained from FTIR analysis, as listed in Table I.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Self-Reinforced Hybrid Polyethylene/MCM-41 Nanocomposites: <I>In-Situ</I> Polymerisation and Effect of MCM-41 Content on Rigidity

Campos¹,

Lourenço²,

Pérez³

et al. 2009

J. Nanosci. Nanotech.

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The synthesis of self-reinforced polyethylene-based materials prepared by in-situ polymerisation is described. The methodology developed uses MCM-41 mesoporous material in a triple role: as catalyst carrier for ethylene polymerisation within its pores and channels in a first stage, as nanofiller of the formed polyethylene matrix during its useful lifetime and, finally, as promoter for long-term waste disposal. As evidenced by FTIR analysis, when the polymer is formed under these confined conditions different interactions between the MCM-41 material and the polyethylene matrix occur, when compared to simple blends. The influence of the filler content on the rigidity of the resulting nanocomposites is analysed by microhardness measurements and corroborated by the storage modulus values: a significant increase in rigidity is observed as the filler contents rises. In addition, thermogravimetric studies show interesting features concerning the degradability of these materials. The catalytic action of MCM-41 during degradation involves a reduction of the energetic requirements for their cracking and, therefore, a positive environmental impact.

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Catalytic degradation of polyolefins over hexagonal mesoporous silica: Effect of aluminum addition

Cited by 51 publications

References 20 publications

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

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

Hybrid HDPE/MCM-41 nanocomposites: Crystalline structure and viscoelastic behaviour

Self-Reinforced Hybrid Polyethylene/MCM-41 Nanocomposites: <I>In-Situ</I> Polymerisation and Effect of MCM-41 Content on Rigidity

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