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本文着重研究了在C_5~0/C_6~0全异构化工艺过程中所采用的吸附分离条件下正戊烷和正己烷在5A分子筛上的吸附热力学.测定了533～653K和5.32～199.5kPa下正戊烷和正己烷在5A分子筛上的吸附平衡数据.用Langmuir方程、D-A方程等对实验吸附等温线数据进行拟合的结果表明,在低压范围内,Langmuir方程可以很好地拟合实验结果,但在较宽的压力范围内,D-A方程对实验结果拟合得更好.利用拟合得到的D-A吸附等温线方程进行内插,并通过Clausius-Clapeyron方程计算出了正戊烷和正己烷在5A分子筛上的等量吸附热以及吸附熵.计算结果表明,随着吸附容量的增大,吸附热也出现增大的趋势.
In this paper, the adsorption thermodynamics of n-pentane and n-hexane on 5A molecular sieve under the conditions of adsorption and separation used in the process of C_5 ~ 0 / C_6 ~ 0 isomerization process were studied emphatically.The effects of 533 ~ 653K and 5.32 ~ 199.5kPa The adsorption equilibrium data of n-pentane and n-hexane on 5A molecular sieve.The results of fitting the experimental adsorption isotherm data with Langmuir equation and DA equation show that the Langmuir equation can well fit the experiment in the low pressure range As a result, the DA equation fits better with the experimental results over a wide range of pressures. The fitted DA adsorption isotherm equation was used to interpolate and the Clausius-Clapeyron equation was used to calculate the n-pentane and n- The isothermal adsorption heat and adsorption entropy of alkane on 5A zeolite show that the adsorption heat also increases with the increase of adsorption capacity.