Browsing by Author "Kumar, Pramod"

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    Catalytic Activity of CeO2 -NiO for Low Temperature Soot Combustion
    (IJERT, 2014-09-20) Mahofa, Eubert Privilege; Narsaiah, T. Bala; Chakra, Shilpa; Kumar, Pramod; Aftabtalab, Adeleh
    CeO2 (Ce) and CeO2-NiO (CeNi) nano- catalysts were synthesized by co-precipitation from nitrate precursors using 25% ammonia solution (NH4OH) as the precipitating agent. The catalysts were calcined in air at 500ºC and 800ºC for 4h to evaluate the thermal stability. XRD and DLS techniques were used for catalyst characterization. A Thermo gravimetric/Differential Thermal Analyzer (TG/DTA) was used to determine the catalytic activity and soot oxidation reactions. Compared with Ce, Ce-Ni nanocomposite showed lower soot oxidation temperature.
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    Effects of Calcination Temperature on properties of Mg-Al mixed oxide nanoparticle.
    (Materials Today: Proceedings 2, 2015-01-01) Govhaa, Joseph; Narasaiaha, T. Bala; Chakrab, Ch.Shilpa; Kumar, Pramod
    The limited size and high density of surface sites that characterize nanoparticles result in unique chemical and physical properties. Magnesium aluminum mixed oxide was synthesized by co-precipitation method using Al2 (SO4)3.16H2O and MgSO4.7H2O precursors in 1:1 molar ratio. The calcination temperature was varied from 250, 300 and 700o C. Nanoparticles synthesized were characterized using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and TGA-DTA. At low temperature synthesized spherical particles are amorphous and they start to transform into spinel crystalline structure around 650o C. Generally particle size increased with increase in temperature.