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New polymer catalytic membranes for nitrite reduction: experimental assessment

Abstract: In this work we report the experimental assessment of the performance of a new catalytic hollow fiber reactor with supported Pd catalyst for nitrite removal from polluted waters. The reactor configuration facilitates working at low flowrate and hydrogen concentrations in order to improve the selectivity of the reduction reaction towards nitrogen, thus, inhibiting the formation of ammonia. Pd catalyst was supported on propylene and polyethersulfone hollow fibers following a simple impregnation method; the stability of the supported catalyst was checked along the operation time. Experiments of nitrite reduction were carried out in the range of 0.075-1 bar of H2 partial pressure, 0.3-0.4 bar of CO2 partial pressure, 200-400 mL/min of water flowrate and 20-200 mL/min of gas flowrate with an initial nitrite concentration of 150 mg/L. Under the experimental conditions a selectivity to N2 close to 90% with 80% conversion of nitrites was achieved.

 Autoría: Guate M., Ortiz A., Ortiz I.,

 Fuente: Journal of Membrane Science and Research, 2019, 5(2), 157-164

 Editorial: Amirkabir University of Technology - Membrane Processes Research Laboratory

 Fecha de publicación: 01/04/2019

 Nº de páginas: 8

 Tipo de publicación: Artículo de Revista

 DOI: 10.22079/JMSR.2018.93546.1213

 ISSN: 2476-5406

 Proyecto español: CTQ2015-66078-R