Titanium Silicalite-2 (TS-2) zeolite catalyst is a second-generation titanium–silicon molecular sieve oxidation catalyst and an important member of the titanium silicalite family. Unlike TS-1 (MFI structure), TS-2 belongs to the MEL-type zeolite framework, TS-2 exhibits an almost one-dimensional straight channel system, which significantly affects molecular transport behavior within the catalyst.
TS-2 zeolite catalyst is developed as a structural and diffusion-enhanced counterpart to TS-1 in order to overcome the intrinsic limitations of the MFI-type framework, particularly the restricted access of bulky reactant molecules. The straight and less-interconnected pore architecture of TS-2 provides a more open diffusion pathway, enabling larger organic molecules to enter, react, and exit more efficiently, while reducing the probability of pore blocking and diffusion limitations commonly observed in TS-1.
TS-2 zeolite catalyst demonstrates superior performance in reactions involving medium to large-sized organic substrates, where steric hindrance plays a critical role. The improved mass transport characteristics make TS-2 particularly suitable for large-molecule selective oxidation processes, while still maintaining the high selectivity associated with framework-isolated titanium active sites.
TS-2 molecular sieve combines the advantages of isolated titanium active sites with an improved diffusion architecture. It provides a practical solution to mass transfer limitations in zeolite catalysis, positioning it as an important catalyst for expanding the scope of titanium-silicalite materials toward larger and more complex organic oxidation reactions.
| Crystal Type | TS-2 |
| Apprearance | White powder |
| Crystal Structure | MEL |
| Pore Size(nm) | 0.56~0.74 |
| Crystal Size(μm) | 0.1~2.0 |
| BET Surface Area(m2/g) | >280 |
| SiO2/Ti2O2(mol/mol) | 30~70 |
| Na2O(wt%) | ≤0.1 |
* Petroleum Oxidation Catalyst
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