Table 1. Description of Samples and Needles.
sample number | description | APT needle numbers |
---|---|---|
1 | high-Si SAPO-34, calcined | |
2 | low-Si SAPO-34, calcined | |
3 | 29Si enriched, high-Si SAPO-34, calcined | 1–3 |
4 | 29Si enriched, low-Si SAPO-34, calcined | 4, 5 |
5 | large crystals SAPO-34, fresh | 6–11 |
6 | large crystals SAPO-34, calcined | 12–16 |
7 | large crystals SAPO-34, MTH reacted | 17–22 |