Catalyst

code

Catalyst composition

Surface

area (m²/g)

Nature of

phase

ALH 3

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

65.3

Tetragonal

ALH 11

${\text{ZrO}}_{\text{2}}{\text{-SO}}_4^{2-}$

88

Tetragonal

ALH 7

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

101

Tetragonal

ALH 13

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

104

Anatase

ALH 18

${\text{TiO}}_{\text{2}}{\text{-SO}}_4^{2-}$

142.8

Anatase

ALH 23

TiO₂

250

Anatase

ALH 33

MCM-41

1090

Hexagonal arrangement of pores

ALH 34

Nb-MCM-41

1050

Hexagonal arrangement of pores

ALH 39

SBA-15

790

Hexagonal arrangement of pores

ALH 40

Nb-SBA-15

660

Hexagonal arrangement of pores