CO preferential oxidation in a novel Au@ZrO2 flow-through catalytic membrane reactor with high stability and efficiency. (17th August 2016)

• Record Type: Journal Article
• Authors: Zhu, Feng; Zhang, Yuting; Gu, Xuehong; Chen, Changlin; Jin, Wanqin; Ke, Xuebin
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 31(2016)
• Page Start: 13513
• Page End: 13520
• Publication Date: 2016-08-17
• Subjects: Catalytic membrane reactor -- Gold nano-particle -- Hollow fiber -- CO preferential oxidation -- H2 purification; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.05.210
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: CO preferential oxidation (CO-PROX) achieves much interest as a strategy to remove trace CO in reformed gases for hydrogen utilization. Herein, we reported a novel Au@ZrO2 catalytic membrane reactor by embedding gold nano-particles in ZrO2 hollow fiber membrane for CO-PROX. The flow-through catalytic membrane exhibited high catalytic activity and oxygen selectivity, which gave a turnover frequency of 4.73 s −1 at 60 °C, 2–3 times higher than conventional catalyst pellets. CO conversion of >95% was achieved over the catalytic membrane, which maintained great operational stability during 500-h operation even CO2 and H2 O were added in the feed stream. The excellent catalytic performance of the flow-through catalytic membrane makes gold catalyst possible for practical application in the removal of CO from hydrogen. Graphical abstract: Highlights: Au@ZrO2 catalytic membranes were prepared by embedding gold nano-particles in ZrO2 hollow fiber membranes. The introduction of catalytic membrane reactor helps to enhance the catalytic activity and TOF value. Au@ZrO2 catalytic membranes exhibited high stability and tolerance to CO2 and H2 O.