Optimization and modeling of synthesis parameters of neodymium(III) bromide by dry method using full factorial design analysis |
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Institution: | 1. Laboratoire de Physico-chimie des Matériaux et Catalyse, Faculté des Sciences Exactes, Université de Bejaia, Targa ouzemmour 06000, Algeria;2. Chemical Metallurgy Group, Department of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland |
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Abstract: | The synthesis of neodymium(III) bromide (NdBr3) by sintering brominating of neodymium oxide (Nd2O3) with ammonium bromide (NH4Br) was investigated. The influence of various synthesis parameters (temperature, contact time and stoichiometry) on the reaction yield was studied and optimized. The main interaction effects of the synthesis parameters on the reaction yield were also determined by a full 23 factorial designs with six replicates at the center point.This study showed that the optimum conditions for the synthesis of NdBr3 are following: contact time t = 60 min, stoichiometry in moles Nd2O3:NH4Br = 1:24 and temperature T = 400 °C. The reaction yield for these parameters was equal to 97.80%. The first order model was obtained to predict the reaction yield as a function of these three parameters. It was shown that all parameters have a significant positive influence on reaction yield. In addition it was pointed out also that the interaction effects between them are significant. |
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Keywords: | Neodymium(III) bromide Lanthanide halides Reaction yield Full factorial design |
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