Catalytic co-pyrolysis of ironbark and waste cooking oil using strontium oxide-modified Y-zeolite for high-quality bio-oil production

Dada, Tewodros Kassa; Islam, Md Anwarul; Kumar, Ravinder; Scott, Jason; Antunes, Elsa

doi:10.1016/j.cej.2022.138448

Cited by 13 publications

(1 citation statement)

References 52 publications

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“…It is worth noting that the trace inorganic impurities should also have certain influences on the production of aromatic hydrocarbons. SrO and MgO could enhance the surface basicity of catalysts by providing additional basic sites, which facilitated the deprotonation of carboxylic acid groups to generate carboxylate anions and subsequently aromatic hydrocarbons. , ZnO and Fe 2 O 3 could adjust the electron density and energy level distribution on the catalyst surface by providing extra electrons or modifying the electron distribution. These modifications facilitated the adsorption of aromatic acids, reduced their activation energy, and expedited the decarboxylation process. , SiO 2 , TiO 2 , and Al 2 O 3 could serve as network-forming agents to stabilize the lattice structures of catalysts at high temperatures, indirectly boosting their catalytic activity. , …”

Section: Resultsmentioning

confidence: 99%

Coupling of Steam and CaO Derived from Oyster Shells in the Pyrolysis of Waste Poly(ethylene terephthalate) for the Selective Production of Aromatic Hydrocarbons

Feng,

Luo,

et al. 2024

Energy Fuels

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In light of escalating environmental concerns, the development of innovative and effective recycling techniques for poly(ethylene terephthalate) (PET) waste is crucial for sustainable waste management. In this study, an active CaO was prepared from oyster shells (AOSC) and utilized in the selective conversion of PET into aromatic hydrocarbons (benzene and biphenyl) by coupling steam-assisted prepyrolysis and CaO-catalyzed pyrolysis. The physicochemical properties of AOSC and commercial CaO were characterized. The influences of the catalyst preparation methods, catalytic pyrolysis temperatures (550–750 °C), and AOSC/PET ratios (2–10) on the formation of benzene and biphenyl were systematically investigated using a lab-scale pyrolysis apparatus. The results unveiled that AOSC possessed high specific surface area, large pore volume, and abundant basic sites, which were 2.78, 8.7, and 1.62 times higher than those of commercial CaO, respectively. At the steam-assisted prepyrolysis temperature of 300 °C, catalytic pyrolysis temperature of 650 °C, and AOSC/PET ratio of 6, the yields of benzene and biphenyl could reach 27.34 and 2.97 wt %, significantly higher than those obtained from noncatalytic PET pyrolysis (5.67 and 1.22 wt %). In addition, the spent catalysts were also characterized, demonstrating that AOSC exhibited good anticoke performance with a lower coke amount of 10.37 mg/g compared to that of commercial CaO (20.24 mg/g) after pyrolysis. This study not only lays the foundation for sustainable management of waste PET but also demonstrates the potential of utilizing waste seashells to produce valuable resources, thereby promoting a circular economy and mitigating environmental pollution.

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