Preferential Oxidation of CO in a Hydrogen-Rich Gas Through Au/NaY Catalytic Membranes

• Published in: Tsinghua science and technology 2010-08, Vol.15 (4), p.397-403
• Main Author: 朱自萍 刘艳梅 杨占照 顾学红 徐南平
• Format: Article
• Language: English
• Subjects: CO oxidation; membrane reactor; nano-sized gold; NaY zeolite membrane; NaY分子筛; 一氧化碳; 催化膜; 富氢气体; 射线衍射分析; 离子交换过程; 纳米金粒子
• ISSN: 1007-0214; 1878-7606; 1007-0214
• DOI: 10.1016/S1007-0214(10)70079-1

This paper describes novel Au/NaY catalytic membranes for preferential oxidation of CO （CO-PROX） in an H2-rich gas. NaY zeolite membranes with a high CO2/N2 separation factor were loaded with nanosized Au particles using an ion-exchanged method. X-ray diffraction analyses showed that the structure of the NaY zeolite was not damaged by the ion exchange process. CO-PROX experiments showed that the catalytic membranes had excellent catalytic performance for selective oxidation of CO. The CO/H2 molar ratio on the permeate side decreased with increasing operating temperature in the range of 80-200℃. At 200℃, almost no CO was detected from the permeate stream of a catalytic membrane with the feed con- taining 0.67% CO, 1.33% 02, 32.67% H2, and He in balance. Thus, these Au/NaY catalytic membranes show a promise for CO removal from hydrogen fuels.