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Synthesis, characterization and performance of CuO/La2O3 composite catalyst for ammonia catalytic oxidation by Chang-Mao Hung is a Engineering article available to read on EtoBox.

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Selective catalytic oxidation (SCO) Tubular fixed-bed reactor (TFBR) Ammonia CuO/La 2 O 3 composite catalyst This work considers the oxidation of ammonia (NH 3 ) by selective catalytic oxidation (SCO) over a CuO/La 2 O 3 composite catalyst at temperatures between 150 and 400 °C. A CuO/La 2 O 3 composite catalyst was prepared by co-precipitation of copper nitrate and lanthanum nitrate at various molar concentrations. This study also considers how the concentration of influent NH 3 (C 0 = 1000 ppm), the space velocity (GHSV = 92,000 l/h), the relative humidity (RH = 12%) and the concentration of oxygen (O 2 = 4%) affect the operational stability and the capacity for removing NH 3 . The catalysts that were characterized using FTIR, XRD, UV-Vis, BET and PSA, have shown that the catalytic behavior is related to the copper (II) oxide, while lanthanum (III) oxide may serve only to provide active sites for the reaction during a catalyzed oxidation run. The experimental results show that the extent of conversion of ammonia by SCO in the presence of the CuO/La 2 O 3 composite catalyst was a function of the molar ratio. The ammonia was removed by oxidation in the absence of CuO/ La 2 O 3 comp

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Author

Chang-Mao Hung

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-5910)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)