The effect of potassium modification on structural properties and catalytic activity of copper and iron containing SBA-16 catalysts for selective oxidation of ethanol
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Copper and iron SBA-16 catalysts were synthesized using hydrothermal method and modified with potassium. XRD patterns showed that characteristic peaks of SBA-16 for all catalysts did not destroy with metal loading. The metal and potassium loading to SBA-16 structure led to generally the decreasing of specific surface area values. While total pore volume value of SBA-16 increased with copper loading, it decreased with iron loading. Pore diameter values of SBA-16 generally increased with metal loading. It was seen that from TEM images metals settled as nanoparticles to the SBA-16 structure. EDX results demonstrated that potassium modification treatment increased especially the success of metal loading. FTIR spectrums of all catalysts exhibited the characteristic structural bands of SBA-16. It was seen that the peak intensity of both Brønsted and Brønsted + Lewis acid sites of the SBA-16 increased by the metal loading. On the other hand potassium modification improved the acid sites. UV–Vis DR and XPS spectra showed that copper and iron species settled as Cu+2 and Fe+3 form, respectively. The potassium modified catalysts exhibited the highest conversion of 77% and acetaldehyde selectivity of 81% compared to catalysts without potassium modification at reaction temperature of 350 °C. © 2019 Elsevier B.V.
Açıklama
Anahtar Kelimeler
Acetaldehyde Selectivity, Cu-SBA-16, Fe-SBA-16, Potassium Modification
Kaynak
Materials Chemistry and Physics
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
227
Sayı
Künye
Akti, F. (2019). The effect of potassium modification on structural properties and catalytic activity of copper and iron containing SBA-16 catalysts for selective oxidation of ethanol. Materials Chemistry and Physics, 227, 21-28.
