Hydrothermal synthesis of TS-1 film with mixed templates on cordierite support

摘要

Titanium silicalite-1 (TS-1) molecular sieves were successfully synthesised and planted on the surface of honeycomb shaped cordierite support by hydrothermal method. The film formed on the internal wall of cordierite was characterised by Brunauer-Emmett-Teller (BET), XRD, Fourier transform infrared (FT-IR) and environmental scanning electron microscope (ESEM). The results showed that after pretreatment with acids, cordierite supports lost 2-6% of their weight whereas the specific surface area increased by 5-10 times. The highest specific surface area was that of the support pretreated by 37% hydrochloric acid for only one time, which had superior performance in molecular sieve growth to the others. In order to get well shaped and unique crystalline of TS-1, a higher ratio of TBA+/TEA+ was needed. When the ratio is <1˙88, the TS-2 crystal could be formed and found on XRD pattern at the triplet peaks 2θ≈45°. Then, the effects of other conditions, such as temperature, duration time, on the growth of TS-1 film were also discussed.