β分子筛的酸性和孔道对α-蒎烯催化转化性能的影响

Effect of Acid Property and Pore Structure of Zeoliteβfor Isomerization ofα-Pinene

高等物理化学实验是我校理科化学专业学生的必修课,催化剂的制备与表征是其中不可或缺的部分。本实验是对高等物理化学教学实验“NH3-TPD法分析材料的酸性质”及“催化剂活性及选择性的测定”的改进,改进后方案将原实验方案中考察单一催化剂上反应物在不同反应温度和反应时间下的转化率和选择性,更改为具有不同孔道结构和酸量的三种催化剂在同一反应条件下的催化性能对照,同时结合仪器分析实验“N2物理吸附”等相关化学实验,使学生连贯地学习催化剂的制备、改性与表征技术,更清晰地认识影响催化剂催化性能的影响因素。旨在使学生将在多门课程中所学习到的理论知识融会贯通,深入了解β分子筛在较大尺寸反应物分子的转化反应中发挥催化作用的原理。

Advanced Physical Chemistry Lab is a mandatory course for undergraduate students majored in chemistry at our university,in which the preparation and characterization of catalysts is an indispensable part.This study improves upon the original“The Analysis of the Acid Property of Materials by NH3-TPD Method”and“Measurement of Catalytic Activity and Selectivity of the Catalyst”experiments.The original experiments involve the effect of reaction temperatures and reaction times on the catalytic activity and selectivity of a single catalyst,as well as the principles of NH3-TPD methods and the measurement of the acidic properties of materials.Conversely,the improved experiment focuses on the connection between the acidic properties and pore structure of the catalytic performance by comparing the catalytic performance of three different catalysts under the same reaction conditions.In addition,the improved experiment takes advantages of the results of the N2 physical adsorption experiment,so that students can comprehensively understand the preparation,modification,and characterization technology of catalysts and have a clearer understanding of the factors affecting the catalytic performance of catalysts.The purpose is to enable students to integrate the theoretical knowledge in related courses and have a deeper understanding of the principle of zeoliteβ,which plays a catalytic role in the transformation of large reactants.