Synthesis and Characterization of Mixed–Metal Oxide Nanoparticles (CeNiO 3 , CeZrO 4 , CeCaO 3 ) and Application in Adsorption and Catalytic Oxidation–Decomposition of Asphaltenes with Different Chemical Structures
作者： F. Dehghani , S. Ayatollahi , S. Bahadorikhalili , M. Esmaeilpour
DOI: 10.1134/S0965544120070038
关键词: Thermogravimetric analysis 、 Adsorption 、 Materials science 、 Nanoparticle 、 Asphaltene 、 Catalysis 、 Oxide 、 Langmuir adsorption model 、 Catalytic oxidation 、 Chemical engineering
摘要: This study investigates the catalytic activity of mixed–metal oxide nanoparticles with different surface acidities on asphaltene adsorption followed by oxidation–decomposition. Three types (CeNiO3, CeCaO3 and CeZrO4) were synthesized, their size, structure, acid properties characterized field–emission scanning electron microscopy (FE–SEM), energy-dispersive X-ray spectroscopy (EDX), high–resolution transmission (HR-TEM), powder diffraction (XRD), Brunauer-Emmett-Teller (BET) area measurement ammonia temperature-programmed desorption (NH3–TPD). Asphaltenes extracted from two Iranian crude oil samples (Kuh-e-Mond API = 12.8 Bangestan 23.8). For all three mixed-metal nanoparticles, isotherm data fitted well to Langmuir model for both types. Results showed that capacity affinity decreases in order CeNiO3 > CeZrO4 adsorbed over subjected oxidation–decomposition a thermogravimetric analyzer (TGA) effect nanoparticles. oxidation−decomposition temperature decreased about 155–180°C Kuh-e-Mond 95–150°C presence showing effect.
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