Platinum Nanoparticles Immobilized on Electrospun Membranes for Catalytic Oxidation of Volatile Organic Compounds

Structured catalytic membranes with high porosity and a low pressure drop are particularly suitable for industrial processes carried out at high space velocities. One of these processes is the catalytic total oxidation of volatile organic compounds, which is an economically feasible and environmenta...

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Vydané v:	Membranes (Basel) Ročník 13; číslo 1; s. 110
Hlavní autori:	Soukup, Karel, Topka, Pavel, Kupčík, Jaroslav, Solcova, Olga
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Switzerland MDPI AG 14.01.2023 MDPI
Predmet:	Acids Adsorption Catalysis Catalysts Catalytic activity Catalytic oxidation Electrodes electrospinning electrospun membranes Ethanol Evaporation Gases Low pressure Membranes Nanoparticles Nitrogen Noble metals Organic compounds Oxidation Particle size Platinum platinum catalysts polybenzimidazole Polybenzimidazoles Porosity Pressure drop Thermal stability Toluene VOCs Volatile organic compounds St Louis Missouri United States > US Czech Republic polybenzimidazole electrospun membranes platinum catalysts electrospinning volatile organic compounds
ISSN:	2077-0375, 2077-0375
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Shrnutí:	Structured catalytic membranes with high porosity and a low pressure drop are particularly suitable for industrial processes carried out at high space velocities. One of these processes is the catalytic total oxidation of volatile organic compounds, which is an economically feasible and environmentally friendly way of emission abatement. Noble metal catalysts are typically preferred due to high activity and stability. In this paper, the preparation of a thermally stable polybenzimidazole electrospun membrane, which can be used as a support for a platinum catalyst applicable in the total oxidation of volatile organic compounds, is reported for the first time. In contrast to commercial pelletized catalysts, high porosity of the membrane allowed for easy accessibility of the platinum active sites to the reactants and the catalytic bed exhibited a low pressure drop. We have shown that the preparation conditions can be tuned in order to obtain catalysts with a desired platinum particle size. In the gas-phase oxidation of ethanol, acetone, and toluene, the catalysts with Pt particle sizes 2.1 nm and 26 nm exhibited a lower catalytic activity than that with a Pt particle size of 12 nm. Catalysts with a Pt particle size of 2.1 nm and 12 nm were prepared by equilibrium adsorption, and the higher catalytic activity of the latter catalyst was ascribed to more reactive adsorbed oxygen species on larger Pt nanoparticles. On the other hand, the catalyst with a Pt particle size of 26 nm was prepared by a solvent evaporation method and contained less active polycrystalline platinum. Last but not least, the catalyst containing only 0.08 wt.% of platinum achieved high conversion (90%) of all the model volatile organic compounds at moderate temperatures (lower than 335 °C), which is important for reducing the costs of the abatement technology.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	2077-0375 2077-0375
DOI:	10.3390/membranes13010110