沸石分子筛是一类固体酸催化剂,常用吡啶及其衍生物这类碱性物质来测定其酸中心的类型和酸度.近年来,有些作者利用空间位阻胺在酸中心上的选择吸附性质,来进行固体酸催化剂表面的Bronsted酸和Lewis酸的测定.实验发现,同一种吡啶衍生物在不同的沸石分子筛上的吸附稳定性不同,不同的吡啶衍生物在同一种固体酸催化剂上的吸附稳定性也不相同.利用这一性质,我们曾用脉冲色谱法和红外光谱法研究了吡啶对于2,6-二甲 Zeolites are a class of solid acid catalysts commonly used for determining the type and acidity of their acid centers, such as pyridine and its derivatives. In recent years, some authors have used the selective adsorption of sterically hindered amines on acid sites to The determination of Bronsted acid and Lewis acid on the surface of solid acid catalyst showed that the adsorption stability of the same pyridine derivative on different zeolites was different and the adsorption stability of different pyridine derivatives on the same solid acid catalyst Is not the same .To use this nature, we have studied by pulse and infrared spectroscopy pyridine for 2,6 - dimethyl