HTS-1分子筛表面酸催化的探针反应研究  

Probe Reactions Catalyzed by Surface Acid Sites of HTS-1

作　　者：刘绚艳[1,3] 尹笃林[1] 朱华元[2] 沈刚[2] 

机构地区：[1]湖南师范大学精细催化合成研究所,资源精细化与先进材料湖南省高校重点实验室,湖南长沙410081 [2]中国石油化工股份有限公司湖南建长石化股份有限公司,湖南岳阳414012 [3]湖南化工职业技术学院,湖南株洲412004

出　　处：《催化学报》2010年第1期72-77,共6页

基　　金：基金来源:国家自然科学基金(20572021);中国石油化工股份有限公司催化剂分公司(kjc070701)

摘　　要：以1,2-环氧环己烷水解为主要探针反应研究了钛硅分子筛HTS-1的表面酸催化性能.结果表明,HTS-1表面酸中心具有较高的催化活性,它的扩散性能和溶剂极性对反应活性的影响很大.还采用吸附吡啶的红外光谱和紫外光谱对HTS-1催化剂表面酸性进行了定性和定量分析.这些结果不仅拓展了HTS-1在精细有机合成中的应用,而且为有效提高HTS-1的催化氧化性能提供了依据.Hydrolysis of 1,2-epoxycyclohexane as a probe reaction was employed to investigate the surface acid properties of titanium-silicate zeolite （HTS-1） catalyst under various conditions. The results indicated that the hydrolysis reaction was mainly affected by solvent polarity and diffusion limitation, and HTS-1 showed outstanding catalytic performance for this reaction. Quantitative and qualitative analysis of acidity and acid sites by means of pyridine adsorption was performed using UV-Vis and FT-IR spectroscopy, respectively, which can distinguish Bronsted acidic sites and Lewis acidic sites and to calculate precisely the surface acid amount of HTS-1. These results not only expand the applications of HTS-1 in fine chemical synthesis but also provide a basis for effectively improving the catalytic performance of HTS- 1 in oxidation.

关 键 词：钛硅分子筛 HTS-1 酸性 1  2-环氧环己烷 水解 

分 类 号：O643.32[理学—物理化学]