Weak acidity

Medium acidity

Strong acidity

Catalysts

Amount of desorbed NH₃

(mmol·g⁻¹)

Density of acid sites

(10⁻⁴ mmol·m⁻²)

Amount of desorbed NH₃

(mmol·g⁻¹)

Density of acid sites

(10⁻⁴ mmol·m⁻²)

Amount of desorbed NH₃

(mmol·g⁻¹)

Density of acid sites

(10⁻⁴ mmol·m⁻²)

ZrO₂

0.37

41.08

0.78

87.25

0.75

82.80

SO₃H-ZrO₂

0.22

78.23

0.20

72.23

0.15

54.00

Al-SBA-15

0.07

2.37

0.08

2.61

---

---

SO₃H-SBA-15

0.11

13.41

0.05

5.68

---

---

H-ZSM-5

1.84

45.66

7.91

195.82

3.00

74.3

SO₃H-ZSM-5

2.26

75.70

4.17

140.01

---

---