High‐rate hydrogen separation using an MIEC oxygen permeable membrane reactor. Issue 4 (27th September 2016)

• Record Type: Journal Article
• Authors: Li, Wenping; Cao, Zhongwei; Zhu, Xuefeng; Yang, Weishen
• Is Part Of: AIChE journal. Volume 63:Issue 4(2017)
• Page Start: 1278
• Page End: 1286
• Publication Date: 2016-09-27
• Subjects: hydrogen separation -- MIEC membrane reactor -- water splitting -- high‐purity hydrogen -- oxygen permeation; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.15502
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : In this study, we propose using mixed ionic‐electronic conducting (MIEC) oxygen permeable membrane to separate hydrogen via the water splitting reaction. To do that, steam was fed to one side of the membrane (side I) and a low‐purity hydrogen was fed to the other side (side II). Oxygen from water splitting on side I permeates through the membrane driven by an oxygen chemical potential gradient across the membrane to react with the low‐purity hydrogen on side II. After condensation and drying, high‐purity hydrogen is acquired from side I. Thus, the hydrogen separation process is realized based on the fact that the low‐purity hydrogen is consumed and high‐purity hydrogen is acquired. We achieved a high hydrogen separation rate (13.5 mL cm −2 min −1 ) at 950°C in a reactor equipped with a 0.5‐mm‐thick Ba0.98 Ce0.05 Fe0.95 O3‐δ membrane. This research proofed that it is feasible to upgrade hydrogen purity using an MIEC oxygen permeable membrane. © 2016 American Institute of Chemical Engineers AIChE J, 63: 1278–1286, 2017