Working conditions for the preparation of the four RET catalysts.
| Catalysts | NH3/ppm | NO/ppm | O2/% | H2O/% | SO2/ppm |
|---|---|---|---|---|---|
| Sample 0 | 500 | 500 | 6 | — | — |
| Sample 1 | 500 | 500 | 6 | 6 | — |
| Sample 2 | 500 | 500 | 6 | — | 500 |
| Sample 3 | 500 | 500 | 6 | 6 | 500 |
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