Abstract
Vanadia-modified titania and alumina catalytically active membranes have been examined for the reduction of nitrogen oxide with ammonia (de-NOx). A situation was achieved in which nitrogen oxide (which was supplied to the membrane from the side of the support) and ammonia (which was supplied to the membrane from the side of the toplayer) reacted with the membrane layer without penetrating to the opposing side of the membrane. At low rates of nitric oxide, the conversion of nitric oxide within the membrane layer was 100% and the selectivity of nitrogen at 320°C was 75-80%, nitrous oxide being the other reaction product. The penetration of ammonia to the support side of the membrane was prevented by adjusting the total pressure difference across the membrane. Laminar flow through the macroporous support, which was directed towards the membrane layer, could counteract the penetration of ammonia species from the toplayer to the support side of the membrane.
Original language | English |
---|---|
Pages (from-to) | 249-260 |
Number of pages | 12 |
Journal | Applied Catalysis |
Volume | 74 |
Issue number | 2 |
Publication status | Published - 1 Jan 1991 |
Externally published | Yes |