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Metal Pillared Bentonite Synthesis and Its Characteristics Using X-Ray Diffraction

Sisnayati, Said Muhammad, Aprianti Nabila, Komala Ria, Dwipayana Hendra, Faizal Muhammad

Journal of Ecological Engineering

2022

Vol. 23, nr 12

68--74

Modification of bentonite by the Al/Fe metal oxide pillarization process was carried out with metal oxides. The bentonite pillars were successfully characterized using an X-Ray Diffraction (XRD) spectrophotometer. The results of XRD characterization showed the peak diffraction angle (2θ) in metal-pillared bentonite was 26.84° at 698.98 cps. Meanwhile, in thermally and chemically activated bentonite, the peak angles were marked at 20.64° and 26.7°. There is a shift in the peak angle after activation and pillarization. XRD patterns showed dioctahedral smectite and quartz accessory minerals.

Modified bentonite-derived materials as catalystsfor selective catalytic reduction of nitrogen oxides

Szymaszek Agnieszka, Kubeł Maciej, Samojeden Bogdan, Motak Monika

Chemical and Process Engineering

2020

Vol. 41, nr 1

13–-24

In the last few years, cationic layered clays, including bentonites have been investigated as potentialcatalysts for SCR DeNOxsystems. In this work, bentonite as the representative of layered clays wasmodified in order to obtain an alternative, low-cost NH3–SCR catalyst. Samples of raw clay wereactivated with HCl or HNO3, treated with C2H2O4and subsequently pillared with alumina by the ion-exchange. Afterwards, the modified materials were impregnated with iron and copper. The obtainedcatalysts were characterized by XRD and FT-IR. SCR catalytic tests carried out over analyzed samplesindicated the conversion of NO of approximately 90% for the most active sample. The type of acidused for modification and the type of active phase strongly influenced the catalytic properties of theanalyzed materials.