Authors
Zhongyun Liu, Yang Liu, Gongping Liu, Wulin Qiu, William J Koros
Publication date
2019/10/16
Journal
Industrial & Engineering Chemistry Research
Volume
59
Issue
12
Pages
5333-5339
Publisher
American Chemical Society
Description
Robust high-performance hollow fiber membranes are needed for sour natural gas separation. In this study, a semi-rigid, cross-linkable, defect-free 6FDA-based polyimide hollow fiber membrane was developed and evaluated under pure H2S and three realistic sour natural gas feeds. No cross-linking-induced decline of H2S permeance was observed, indicating that the delicate asymmetric nanostructures of hollow fibers were well preserved during the cross-linking process due to the rigid molecular structure. For sour natural gas feed with low H2S concentration (0.5% H2S, 20% CO2, 79.5% CH4), the cross-linked hollow fiber membrane exhibited H2S permeance and H2S/CH4 permselectivity as high as 32 GPU and 30, respectively, at 450 psi and 35 °C. The CO2 permeance and CO2/CH4 permselectivity were also well maintained with values of 35 GPU and 32, respectively. Under more aggressive sour natural …
Scholar articles
Z Liu, Y Liu, G Liu, W Qiu, WJ Koros - Industrial & Engineering Chemistry Research, 2019