Catalyst

code

Catalyst

composition

Acidity

n^H+ (mmol/g)

ALH 28

HfO₂

2.6

ALH 29

${\text{HfO}}_{\text{2}}/{\text{SO}}_4^{2-}$ (0.5 M)

12

ALH 30

${\text{HfO}}_{\text{2}}/{\text{SO}}_4^{2-}$ (1 M)

14

ALH 31

HfO₂/Nb (3%)

3.5

ALH 32

HfO₂/Nb (5%)

4