Intrinsic activity of titanium sites in TS-1 and Al-free Ti-Beta

被引：0

作者：

Wilkenhöner, U

Gammon, DW

van Steen, E ^{[1
]}

机构：

[1] Univ Cape Town, Dept Chem Engn, Catalysis Res Unit, ZA-7701 Rondebosch, South Africa

[2] Univ Cape Town, Dept Chem, Catalysis Res Unit, ZA-7701 Rondebosch, South Africa

来源：

IMPACT OF ZEOLITES AND OTHER POROUS MATERIALS ON THE NEW TECHNOLOGIES AT THE BEGINNING OF THE NEW MILLENNIUM, PTS A AND B | 2002年 / 142卷

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The intrinsic activity of Ti-sites in the pores of TS-1 and Al-free Ti-Beta in the phenol hydroxylation with water and methanol as a solvent is estimated using the Thiele-modulus approach. The observed kinetic data were modelled using 2(nd) order rate expressions. The intra-crystalline diffusivity of phenol was determined using Zero Length Column chromatography. The intrinsic rate constant for phenol consumption with water as a solvent over TS-1 is smaller than the one over Al-free Ti-Beta. Due to strong selective adsorption of phenol with water as a solvent, definite conclusions on the intrinsic activity of Ti-sites in these two titano-silicates with water as a solvent cannot be made. Selective adsorption is not important with methanol as a solvent. Based on the intrinsic activity with methanol as a solvent, it can be concluded that titanium sites in TS-1 are more active than those in Ti-Beta.

引用

页码：619 / 626

页数：8

共 17 条

[1] Spectroscopic characterization of silicalite-1 and titanium silicalite-1 [J].