CO2-tolerant U-shaped hollow fiber membranes for hydrogen separation. (16th February 2017)

• Record Type: Journal Article
• Authors: Liu, Hui; Chen, Yan; Wei, Yanying; Wang, Haihui
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 7(2017)
• Page Start: 4208
• Page End: 4215
• Publication Date: 2017-02-16
• Subjects: Hydrogen permeation -- Membrane separation -- Hollow fiber -- Tungstates -- CO2; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.09.132
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Tungstates (Ln6 WO12 ) are considered as one of the most promising candidates for hydrogen separation membrane materials. Among varies Ln6 WO12 materials, the molybdenum doped neodymium tungsten oxides have attracted increasing attention due to their sufficient mixed proton-electron conductivity and high tolerance towards acid gases, such as CO2 and H2 S. The hydrogen permeation properties of the U-shaped Nd5.5 W0.5 Mo0.5 O11.25-δ (NWM) hollow fiber membranes have been studied systematically in this work. A high hydrogen permeation flux of 1.29 mL/min·min 2 was obtained at 975 °C using 80% H2 –20% He as feed gas and humidified Ar as sweep gas. Furthermore, the U-shaped NWM hollow fiber membrane present a hydrogen permeation flux with only a slight decrease during 80 h's operation feeding with the CO2 -containing gas. Highlights: U-shaped NWM hollow fiber membrane has been prepared and used for H2 separation. A H2 permeation flux of 1.29 mL/min·min 2 can be obtained at 975 °C. NWM hollow fiber membrane shows good CO2 stability.