Autors: Boycheva, S. V., Szegedi Á., Lázár K., Popov C., Popova M.
Title: Advanced high-iron coal fly ash zeolites for low-carbon emission catalytic combustion of VOCs
Keywords: Carbon capture; Iron-enriched coal fly ash zeolites; Low-cos

Abstract: Coal fly ash zeolites (CFAZs) with increased iron oxide content were prepared by double-stage alkaline conversion of high-iron lignite coal ash. Catalysts were modified by applying radiofrequency plasma treatment with trifluoromethane (RF CHF3) to increase their surface activity. Textural, compositional, and structural characterization of the parent and plasma-modified zeolites were performed by N2-physisorption, X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FT-IR) spectroscopy. Oxidation state and coordination of iron species were studied by Mössbauer spectroscopy, UV-Vis spectroscopy and temperature-programmed reduction method (TPR). Acidic properties were investigated by FT-IR spectroscopy of adsorbed pyridine. The initial and plasma-modified samples were studied under toluene oxidation.

References

    Issue

    Catalysis Today, vol. 418, pp. 114109, 2023, Netherlands, Elsevier B.V., DOI 10.1016/j.cattod.2023.114109

    Copyright Elsevier B.V.

    Цитирания (Citation/s):
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    Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus