Dataset Information

Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts.

ABSTRACT: Insoluble rust waste from the scraping of rusted iron-containing materials represents a cheap, eco-friendly, and available source of iron. LaFeO₃ perovskite-type powders were successfully prepared by solution combustion synthesis using rust waste from an electricity transmission tower manufacturer. Solution combustion synthesis enabled introduction of this insoluble iron precursor directly into the final product, bypassing complex extraction procedures. Catalytic activity in the propylene oxidation of the waste-derived LaFeO₃ with stoichiometric Fe/La ratio was almost identical to the commercial iron nitrate-derived LaFeO₃, thus demonstrating the viability of this recycling solution. The amount of waste iron precursor was varied and its effect on the powder properties was investigated. A lesser stoichiometric amount of precursor produced a LaFeO₃-La₂O₃ binary system, whereas a higher stoichiometric amount led to a LaFeO₃-Fe₂O₃ binary system. Catalytic activity of iron-rich compositions in the propylene oxidation was only slightly lower than the stoichiometric one, whereas iron-poor compositions were much less active. This eco-friendly methodology can be easily extended to other iron perovskites with different chemical compositions and to other iron-containing compounds.

SUBMITTER: Deganello F

PROVIDER: S-EPMC6647980 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts.

Deganello Francesca F Joshi Manisha M Liotta Leonarda F LF La Parola Valeria V Marcì Giuseppe G Pantaleo Giuseppe G

ACS omega 20190418 4

Insoluble rust waste from the scraping of rusted iron-containing materials represents a cheap, eco-friendly, and available source of iron. LaFeO<sub>3</sub> perovskite-type powders were successfully prepared by solution combustion synthesis using rust waste from an electricity transmission tower manufacturer. Solution combustion synthesis enabled introduction of this insoluble iron precursor directly into the final product, bypassing complex extraction procedures. Catalytic activity in the propy ...[more]

PMID: 31459812

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Project description:The escalating issue of plastic waste generation has prompted the search for an effective solution to address these challenges. In this study, we present a novel plasma-enabled strategy for the rapid breakdown of various types of plastic wastes, including mixtures, into high-value carbon nanomaterials and hydrogen. The H2 yield and selectivity achieved through the implemented catalyst-free plasma-enabled strategy are 14.2 and 5.9 times higher, respectively, compared to those obtained with conventional thermal pyrolysis under similar conditions. It is noteworthy that this catalyst-free plasma alone approach yields a significantly higher energy yield of H2 (gH2/kWh) compared to other pyrolysis processes. By coupling plasma pyrolysis with thermal catalytic process, employing of 1 wt . % M/CeO2 (M=Fe, Co, and Ni) atomically dispersed catalysts can further enhance hydrogen production. Specifically, the 1 wt . % Co/CeO2 catalyst demonstrated excellent catalytic performance throughout the 10 cycles of plastic waste decomposition, achieving the highest H2 yield of 46.7 mmol/gplastic (equivalent to 64.4 % of theoretical H2 production) and nearly 100 % hydrogen atom recovery efficiency at the 7th cycle. Notably, the H2 yield achieved over the atomically dispersed Fe on CeO2 surface (1 wt . % Fe/CeO2) in the integrated plasma-thermal catalytic process is comparable to that obtained with Fe particles on CeO2 surface (10 wt . % Fe/CeO2). This outcome, demonstrated with single-atom catalysts, offers a promising avenue for cost-effective and efficient chemical plastic recycling. Through a combination of experimental and computational efforts, we have provided an in-depth understanding of the catalytic mechanisms of the investigated single atom catalysts in the developed plasma-enabled process. This innovative and straightforward approach provides a promising and expedient strategy for continuously converting diverse plastic waste streams, including mixed and contaminated sources, into high-value products conducive to a circular plastic economy.

Dataset Information

Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts.

Publications

Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts.

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