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采用流动重量法测定了533～653K和3.33～106.0kPa范围内正丁烷和正庚烷在小球5A分子筛上的平衡吸附容量。用Langmuir方程、Wilkins方程以及Dubinin-Astakhov方程对平衡吸附容量数据进行了拟合。结果表明,在实验条件范围内,Wilkins方程和Dubinirt-Astakhov方程能很好地表达实验结果。根据Dubinin-Astakhov方程,利用Clausius-Clapeyron方程,计算得到了正丁烷和正庚烷在5A分子筛上的等量吸附热和吸附熵。
The equilibrium adsorption capacities of n-butane and n-heptane on 5A zeolites were measured by flow-gravimetric method in the range of 533 ~ 653K and 3.33 ~ 106.0kPa. The equilibrium adsorption capacity data were fitted using the Langmuir equation, the Wilkins equation, and the Dubinin-Astakhov equation. The results show that the Wilkins equation and Dubinirt-Astakhov equation can well express the experimental results within the experimental conditions. According to the Dubinin-Astakhov equation, Clausius-Clapeyron equation was used to calculate the isothermal adsorption enthalpy and adsorption entropy of n-butane and n-heptane on 5A molecular sieve.