Evaluation of a pilot-scale scrubber for the mitigation of NH3 emissions from laboratory animal house in the presence of different oxidants

A mixed catalyst prepared by mechanically milling VW/TiO2 and low content of Pt/Al2O3 for SCO of high-concentration NH3

“…25 The peak at 516.1-516.3 eV could be assigned to V 4+ species, and the peak at 517.3 eV could be ascribed to V 5+ species. 17,18 It can be seen from Table S2 (ESI †) that the V 4+ /(V 4+ + V 5+ ) ratio which was calculated from the peak area ratio of V 4+ to V 4+ + V 5+ was 64.20%. The W 4f XPS spectrum of the VW/TiO 2 catalyst is shown in Fig.…”

“…[10][11][12][13][14][15] Numerous studies have shown that during the NH 3 -SCO reaction, NH 3 and O 2 are first adsorbed and activated on the catalyst surface and then react with each other. [12][13][14][15][16][17][18][19][20] In order to gain further insight into the NH 3 adsorption behavior and NH 3 -SCO reaction pathways, a series of in situ DRIFTS experiments were conducted at 300 1C. A detailed description of the experimental procedures can be found in the ESI.…”

“…[17][18][19][20] With the action of a catalyst, NH 3 is selectively oxidized into N 2 and H 2 O (eqn (1)). [18][19][20] NH 3 + 3O 2 -2N 2 + 6H 2 O + 1266 kJ (1) A catalyst plays the key role in the NH 3 -SCO reaction. NH 3 -SCO catalysts can be divided into two categories: noble metal catalysts and transition metal catalysts.…”

“…Compared to other methods, SCO is more suitable to remove NH 3 from high-temperature exhaust gas. 17–20 With the action of a catalyst, NH 3 is selectively oxidized into N 2 and H 2 O (eqn (1)). 18–20 NH 3 + 3O 2 → 2N 2 + 6H 2 O + 1266 kJ…”

“…17–20 With the action of a catalyst, NH 3 is selectively oxidized into N 2 and H 2 O (eqn (1)). 18–20 NH 3 + 3O 2 → 2N 2 + 6H 2 O + 1266 kJ…”