利用自制的聚二甲基硅氧烷/聚醚酰亚胺（PDMS/PEI）非对称平板复合膜，以正戊烷/氮气混合体系作为研究对象,考察了原料气浓度、原料气流量、原料气压力、操作温度、渗透侧压力对分离过程的影响。实验结果表明：随着原料气浓度或流量增大,正戊烷的渗透率及分离系数均增大;而随着操作温度升高、原料气压力增大或渗透侧压力增大,正戊烷的渗透率及分离系数均减小。
Abstract
The removal of n-pentane from nitrogen has been investigated using a home-made polydimethylsiloxane (PDMS)/polyetherimide (PEI) asymmetric flat composite membrane. The effects of varying the operating conditions (feed n-pentane concentration, feed flow rate, operating temperature, feed pressure, and pressure in the permeate) on the separation process have been studied. It was shown that n-pentane permeance and separation factor increased with increasing feed n-pentane concentration or feed flow rate, and decreased with increasing operating temperature, feed pressure or pressure in the permeate.
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