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Membrane gas separation module with pulsed retentate for low-permeable component recovery

Battalov Stanislav V., Trubyanov Maxim M., Puzanov Egor S., Sazanova Tatyana S., Drozdov Pavel N, Vorotyntsev Ilya V.

Chemical and Process Engineering

2019

Vol. 40, nr 1

57–-65

The paper presents the experimentalstudy of a novel unsteady-statemembrane gas separation approachfor recovery of a slow-permeant component in the membrane module with periodical retentate with-drawals. The case study consisted in the separation of binary test mixtures based on the fast-permeantmain component (N2O, C2H2) and the slow-permeant impurity (1% vol. of N2)using a radial counter-current membrane module. The novel semi-batch withdrawal technique was shown to intensify theseparation process and provide up to 40% increase in separation efficiency compared to a steady-stateoperation of the same productivity.