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The selective catalytic oxidation of NH3 over Fe-ZSM-5 |
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| Authors: | Aaron Akah Colin Cundy Arthur Garforth |
| Affiliation: | aSchool of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester M60 1QD, UK bSchool of Chemistry, Centre for Microporous Materials, The University of Manchester, Manchester M60 1QD, UK |
| Abstract: | The abatement of NH3 from waste streams has become an important environmental issue. Selective catalytic oxidation (SCO) of NH3 to N2 has emerged as a potential technology for taking care of NH3 slips and NH3 in waste streams. In this work, we describe the catalytic activity of Fe-zeolite catalysts prepared by incipient wetness technique, ion exchange and hydrothermal synthesis in the SCO of NH3 to N2 using a fixed bed flow reactor. Selective catalytic oxidation was carried out at 573–723 K and 105 Pa with gas hourly space velocities (GHSV) between 24 000 and 240 000 h?1. Results obtained showed that Fe-ZSM-5 catalysts prepared by incipient wetness technique were active for NH3 conversion (77–100%) and selectivity to N2 (65–100%). Fe-ASA and Fe-Beta showed good catalytic activity and selectivity, but their activity and selectivity were less than that of Fe-ZSM-5. The effects of water vapour, Fe loading, and activation method on the performance of these catalysts was also investigated. |
| Keywords: | Selective catalytic oxidation Ammonia ZSM-5 Impregnation |
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