催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (1): 72-77.

• 研究论文 • 上一篇    下一篇

HTS-1分子筛表面酸催化的探针反应研究

刘绚艳 1,3, 尹笃林 1, 朱华元 2, 沈刚 2   

  1. 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
  • 收稿日期:2010-01-25 出版日期:2010-01-25 发布日期:2010-01-25

Probe Reactions Catalyzed by Surface Acid Sites of HTS-1

LIU Xuanyan1,3, YIN Dulin1,*, ZHU Huayuan2, SHEN Gang2   

  1. 1Key Laboratory of Resource Fine-Processing and Advanced Materials, Universities of Hunan Province, Institute of Fine Catalysis and Synthesis, Hunan Normal University, Changsha 410081, Hunan, China 2Hunan Jianchang Petrochemical Co. Ltd., SINOPEC, Yueyang 414012, Hunan, China 3Hunan Professional Institute of Chemical Technology, Zhuzhou 412004, Hunan, China
  • Received:2010-01-25 Online:2010-01-25 Published:2010-01-25

PDF

1046

被引次数

10

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.

关键词: 钛硅分子筛, HTS-1, 酸性, 1, 2-环氧环己烷, 水解

Abstract: 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 Brønsted 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.

Key words: titanium-silicate zeolite, HTS-1, acidity, 1, 2-epoxycyclohexane, hydrolysis