| 摘要 |
<p>Process for lowering the concentration of nitrogen oxide in flue gases by reducing the nitrogen oxides present in hot flue gases (1), by using ammonia (10) in the presence of particles (8) which catalyze the reduction of nitrogen oxides. In order to obtain a maximally good contact between the gases (1) and the catalyst (8), small catalyst particles (8) are mixed with the hot flue-gas flow, the particles being so small that they form with the flue gases a suspension flow, from which the catalyst particles are separated (3, 4) after the reduction of the nitrogen oxide, and are returned (6, 7) to the beginning of the hot flue-gas flow (1). The invention additionally relates to the catalyst used in this process.</p> |
