Acidity of all studied zeolite Y and beta materials in mmol gcat−1, determined by NH3-Temperature Programmed Desorption (NH3-TPD). The acidity in the low (LT), intermediate (IT) and high temperature (HT) regimes are given separately from the total acidity.
Sample | Acidity (mmol g−1) | ||||
---|---|---|---|---|---|
LT (100–250 °C) | IT (250–400 °C) | LT (400–600 °C) | Total | Acidity ratio | |
Y | 0.15 | 0.26 | 0.08 | 0.49 | 1.00 |
Y-AL2 | 0.02 | 0.05 | 0.01 | 0.07 | 0.15 |
Y-HT2-AL2 | 0.02 | 0.03 | 0.01 | 0.05 | 0.11 |
Y-HT6-AL2 | 0.03 | 0.05 | 0.01 | 0.09 | 0.19 |
Y-HT24-AL2 | 0.03 | 0.05 | 0.01 | 0.10 | 0.21 |
BH | 0.30 | 0.24 | 0.06 | 0.60 | 1.00 |
BH-AL2 | 0.07 | 0.13 | 0.02 | 0.22 | 0.37 |
BH-HT2-AL2 | 0.08 | 0.13 | 0.02 | 0.24 | 0.39 |
BH-HT6-AL2 | 0.08 | 0.12 | 0.01 | 0.20 | 0.33 |
BH-HT24-AL2 | 0.10 | 0.14 | 0.01 | 0.25 | 0.42 |