原位红外技术在分子筛催化剂研究中的应用进展

Application Progress of In situ Infrared Technology in the Study of Zeolite Catayst

原位红外光谱技术在分子筛催化剂研究中是一种应用广泛的技术,可用于分子筛催化剂吸附形态、表面酸性、活性中心等的表征,并可对反应过程、反应动力学进行深入研究。通过分子筛催化剂表面酸性测定及研究、结构研究、表面羟基研究及反应过程研究几方面简述了原位红外技术在分子筛催化剂研究中的应用进展。并从不同探针分子进行酸性的测试结果进行了分析,通过原位红外可以对表面吸附物种或者OH基团的数量进行准确的测定,此外可以通过与其他高精度的分析方法结合使用,实现原位红外对酸量测试在定量分析。

In situ infrared spectroscopy is a widely used technique in the study of zeolite catalyst. It can be used to characterize the adsorption morphology, surface acidity and active center of molecular sieve catalyst, and can be employed for in-depth study of reaction process and kinetics. The application progress of In situ infrared technology in the research of zeolite catalyst was reviewed, including the determination of surface acidity of zeolite catalyst, the structure of zeolite, the surface hydroxyl and reaction process. Different probes were used to measure the acidity and it was found, the amount of adsorbed species or hydroxyls can be accurately determined by In situ infrared spectroscopy. In addition, it can be combined with other high precision analysis methods to realize the quantitative analysis acid concentration.