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Removal of benzene from nitrogen by using polypropylene hollow fiber gas-liquid membrane contactor

机译：用聚丙烯中空纤维气液膜接触器脱除氮气中的苯

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In this paper, an experimental and theoretical study was carried out to evaluate the performance of gas-liquid membrane contactor in benzeneitrogen separation process by using an aqueous N-Formylmorpholine (NFM) solution as absorbent. The effects of operating parameters such as the gas and liquid flow rates, the feed gas and the initial liquid concentrations, the liquid temperature, the absorbent concentration and the long term operation on the benzene flux and removal efficiency were investigated. A mathematical model was developed to simulate the absorption process in order to gain an insight into the experimental observation. Both simulative and experimental results show that benzene mass transfer flux increases with the gas flow rate and the feed gas concentration, while the liquid flow rate has no significant effect on it. The increase in liquid temperature and initial liquid benzene concentration results in a decrease in benzene flux. Long term performance test shows that the aqueous NFM solution is a suitable absorbent to be applied to the polypropylene (PP) hollow fiber gas-liquid membrane contactor.
机译：本文以N-甲酰基吗啉水溶液为吸收剂，进行了气液膜接触器在苯/氮分离过程中的性能评价实验和理论研究。研究了气体，液体流速，原料气和初始液体浓度，液体温度，吸收剂浓度和长期操作等操作参数对苯通量和去除效率的影响。开发了一个数学模型来模拟吸收过程，以深入了解实验观察结果。模拟和实验结果均表明，苯传质通量随气体流速和原料气浓度的增加而增加，而液体流速对其没有明显影响。液体温度的升高和液体苯的初始浓度的增加导致苯通量的降低。长期性能测试表明，NFM水溶液是一种适用于聚丙烯（PP）中空纤维气液膜接触器的吸收剂。

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