Table 2 Effect of different anions on the ammonia conversion for CWAO of ammonia to N2 over Ru-Cu/C catalyst.

From: The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen

Solution

pH before reaction

Ammonia conversion/%

(NH4)3PO4

8.6

30.8

CH3COONH4

8.5

34.2

(NH4)2SO4

8.9

9.5

NH4Cl

8.4

10.6

NH4NO3

8.5

8.2

  1. Conditions: [NH4 +]0 = 1000 ppm, T = 150 oC, Air pressure = 2 MPa, reaction time = 3 h.
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