Catalytic (Pt-Y) membranes for the purification of H2-rich streams
Catalytic (Pt-Y) membranes for the purification of H2-rich streams
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DOI：
10.1016/j.cattod.2005.12.011
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发表时间：
2006-10
期刊：
影响因子：
5.3
通讯作者：
P. Bernardo;C. Algieri;G. Barbieri;E. Drioli
中科院分区：
文献类型：
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作者：
P. Bernardo;C. Algieri;G. Barbieri;E. Drioli
在使用负载 Pt 的催化膜的膜反应器 (MR) 中研究了用于纯化富氢流的 CO 选择性氧化 (Selox)。催化膜是通过 FAU (Na-Y) 沸石膜的离子交换制备的，该膜是通过二次生长方法在管状 α-Al2O3 载体上合成的。进行催化 MR 测试，分析所需反应的 CO 转化率、O2 选择性和产率。考虑不同的进料成分（CO、O2、H2 和 N2 含量以及 O2/CO 比率）、温度和压力，时空值范围为 0.27–1.2mgPtmin/cm3(STP)。初步试验CO含量为10%，其他试验为1%。还使用了模拟重整油变换气体混合物（H2=60%）。还提供了与使用不同膜类型和采用 Pt 基催化剂的填充床传统反应器的 MR 的其他文献数据的比较。确定的操作条件范围（温度、压力、进料摩尔 O2/CO 比和进料浓度）表明，在燃料处理器的低温水煤气变换单元将碳氢化合物转化为富氢气体之后，在相似的温度条件下操作，使用催化 MR（Pt-Y 沸石膜）进行 CO Selox 是有利可图的。
CO selective oxidation (Selox) for the purification of hydrogen-rich streams was studied in membrane reactors (MRs) using Pt-loaded catalytic membranes. The catalytic membranes were prepared by the ion-exchange of FAU (Na-Y) zeolitic membranes that were synthesized on tubular α-Al2O3supports by a secondary growth method. The catalytic MR tests were performed analysing the CO conversion, O2selectivity and yield of the desired reaction. Different feed compositions (CO, O2, H2and N2content and O2/CO ratio), temperatures and pressures were considered with space-time values in the range 0.27–1.2mgPtmin/cm3(STP). The CO content in preliminary tests was 10%, 1% in the other experiments. A simulated reformate shifted gas mixture (H2=60%) was also used. A comparison with other literature data for MRs utilizing different membrane types and packed bed traditional reactors with Pt-based catalysts is also provided. The identified ranges of operating conditions (temperature, pressure, feed molar O2/CO ratio and feed concentration) suggest a profitable use of the catalytic MR (Pt-Y zeolite membranes) for CO Selox after the low-temperature water gas shift unit of a fuel processor converting hydrocarbons into hydrogen-rich gas, operating at similar temperature conditions.