Sn改性TS-1分子筛对苯氧化反应的催化性能研究

采用Sn对TS-1分子筛进行改性，利用XRD、N2吸附-脱附、XRF、NH3-TPD和IR等手段对分子筛进行表征，并研究其对苯氧化反应的催化性能。结果表明：Sn改性可以调变TS-1分子筛微结构和表面酸性，部分微孔转变为介孔，外比表面积增加，一些强酸中心转变为弱酸中心；经0.5%Sn改性的分子筛的催化活性大幅度提高，苯的转化率可达到21.20%，苯酚和苯二酚的产率也大幅提高，分别是改性前的3.7倍和7.2倍。

STUDY ON BENZENE OXIDATION CATALYZED BY Sn MODIFIED TS-1

The benzene catalytic oxidation performance of TS-1 modified by NH4AC and 0.5wt% Sn was studied. The zeolite was characterized by XRD，N2 adsorption - desorption，XRF，NH3-TPD，IR technologies. And the results indicate that the Sn can modulate the pore structure and surface acidity of TS-1. Mesopores are formed from micropores，extra surface area is increased, and a portion of strong acid sites are transformed into weak acid centers. The conversion of benzene on the zeolite with 0.5% Sn reaches 21.20%; phenol and hydroquinone yields are greatly improved by 3.7 times and 7.2 times after the modification , respectively.