Study on Preparation and Characterization of La₂O₃ Derived from Thai Monazite Ore Processing Supported Coal Fly Ash Catalyst

Abstract:

This research aims to study the preparation and characterization of La₂O₃ supported coal fly ash catalyst. Studied La₂O₃ and coal fly ash (CFA) were obtained from Thai monazite ore processing and local supplier, respectively. The catalyst was prepared by wet impregnation method. The influences of La₂O₃ loading and impregnation temperature on the chemical composition, crystalline phase and surface morphology of the catalyst were examined by varying the amount of La₂O₃ (5, 10 and 20 wt%) and the impregnation temperature (room temperature, 100, 150 and 200 °C). Characterizations such as WDXRF, XRD and SEM were carried out. The XRD results demonstrated that the La₂O₃ was highly dispersed on the CFA support. A high La₂O₃ loading resulted in an increase free CaO dissolvation during the impregnation which inhibited the interaction between SiO₂ and La₂O₃. The impregnation temperature had no significant effect on the chemical and physical properties of the catalyst. The coexist of Fe₃O₄ in the CFA support might impact to hinder the incorporation of La₂O₃ into SiO₂ matrix.

• Periodical: Key Engineering Materials (Volume 861)
• Pages: 365-370
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.861.365
• Online since: September 2020
• Authors: Sasikarn Nuchdang, Wilasinee Kingkam, Orapun Leelanupat, Dussadee Rattanaphra*
• Keywords: Biodiesel, Catalyst, Coal Fly Ash, Impregnation Method, La₂O₃

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