分子筛/水体系的吸附脱附量平衡性质的研究

摘要

An experimental method was referred to measure the amount equilibrium properties in four types of zeolitewater adsorption pairs. With the use of present method, the adsorption amount of water vapor adsorption on 3A,4A,5A and 13X zeolite were determined at various temperature from 30℃ to 120℃ and under saturated pressure of water vapor. The desorption ratios of various zeolites were measured as well. Based on adsorption theories, the Langmuir model was used to correlate the equilibrium data, the adsorption equilibrium equation was also developed, furthermore, it validated the opinion that adsorption amount has max volume and optimum temperature range. Through the analysis of desorption data, we knew that zeolite's desorption is independent of adsorption and a opinion that zeolite with larger pore volume has more "dead volume" was put forward.%提出一套测量分子筛静态水饱和吸附量的实验方案，克服了以往测量方法中对水饱和蒸气压的影响因素，并在此基础上测定了3A、4A、5A和13X 4种分子筛在30～120℃温度范围内不同温度下对水的饱和吸附量，并以单分子层吸附理论为基础拟合了13X分子筛的饱和吸附平衡方程，提出分子筛/水吸附存在最适宜温度区和最大吸附量的理论。还测定了4种分子筛在320℃真空条件下的脱附率，比较结果后提出脱附是独立于吸附的过程，以及饱和孔体积越大的吸附剂其"死体积"也越大。