Review Article
Heterogeneous Tin Catalysts Applied to the Esterification and Transesterification Reactions
Table 4
Physical properties of sulfated metal oxides catalysts [
28].
| | | (wt.%) | BET surface area (m2/g) | Crystalline (%) | Crystallite (nm) | Crystal Structure | Color |
| STO-1
(SnCl4) | 2.0 | 142 | 88.2 (Sn) | 3.2 | Tetragonal | Yellow | STO-2
(SnO2) | 2.6 | 151 | 88.2 (Sn) | 3.5 | Tetragonal | White | | SZ | 3.0 | 165 | 89.4 (Zr) | 11.5 | Tetragonal | White |
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