几种加氢裂化催化剂的太赫兹光谱研究

摘要

采用太赫兹时域光谱(THz-TDS)方法,本文研究了几种Y型加氢裂化催化剂(NaY、ReY、USY和HY)在0.2-1.2THz频段的光谱特性.与此同时,对其中的NaY分子筛进行了加热处理,测量了其经过不同温度处理后的太赫兹时域光谱.通过快速傅里叶变换,分别得到了不同种类和不同温度处理后催化剂的太赫兹吸收谱和折射率谱.研究结果表明,太赫兹时域光谱技术既能用于催化剂的种类鉴别和性能表征,又能给出不同温度下催化剂本身内部结构变化对应的太赫兹光谱响应.本研究工作的展开,证明了太赫兹方法用于催化剂性质表征的可行性,对太赫兹技术在催化领域的应用具有一定的指导意义.%Spectral characteristic of several Y type hydrocracking catalysts (NaY,ReY,USY and HY) are studied using terahertz time-domain spectroscopy (THz-TDS) in the range of 0.2-1.2THz.Meanwhile,molecular sieve NaY was heated at different temperatures and then was measured by THz-TDS.Through fast fourier transformation,both terahertz absorption spectra and refractive spectra of catalysts,which have different class and have been processed by different temperatures,were obtained.The results indicated that THz-TDS technology can not only be used to identify species and characterize properties of catalysts,but also provide terahertz spectral response corresponds to the changes of internal structure of catalysts at different temperatures.Through this work,the feasibility for characterization of catalysts using terahertz method is demonstrated,which can offer guidance in applications of THz technology in catalysis.