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    • 5. 发明授权
    • Method for producing a hydrogen-rich fuel stream
    • 富氢燃料流的制造方法
    • US06409939B1
    • 2002-06-25
    • US09583618
    • 2000-05-31
    • Suheil F. AbdoCynthia A. DeBoyGeralyn F. Schroeder
    • Suheil F. AbdoCynthia A. DeBoyGeralyn F. Schroeder
    • C07C102
    • C01B3/583B01J23/462C01B2203/044C01B2203/047
    • Disclosed is a hydrogen generation process for use with fuel cells which includes a preferential oxidation step to reduce the concentration of carbon monoxide. The preferential oxidation step includes contacting a fuel stream comprising hydrogen and carbon monoxide in the presence of an oxygen at a preferential oxidation temperature of between about 70° and about 160° C. with preferential oxidation catalyst for reducing the concentration of carbon monoxide to produce a treated fuel gas stream comprising less than about 50 ppm-vol carbon monoxide. The preferential oxidation catalyst comprises ruthenium metal dispersed on a shaped alumina carrier, wherein at least 60 percent of the ruthenium metal is present in a band extending from the surface towards the center and having a width of about 50 percent of the distance from the surface to the center of the shaped alumina carrier. Superior performance at low preferential oxidation temperatures below 130° C. was observed when the band comprised 50 percent of the alumina carrier and contained at least 60 percent of the ruthenium metal. The preferential oxidation catalyst may be employed to reduce carbon monoxide in fuel gas streams supplied to fuel cells wherein carbon monoxide will poison the active noble metal membrane and higher preferential oxidation temperatures may reduce the hydrogen content of the gas stream.
    • 公开了一种用于燃料电池的氢气生成方法,其包括优先氧化步骤以降低一氧化碳的浓度。 优选氧化步骤包括在优选氧化温度为约70°至约160℃之间的氧气存在下使包含氢气和一氧化碳的燃料流与优先氧化催化剂接触,以降低一氧化碳的浓度,从而产生 处理的燃料气流包含小于约50ppm体积的一氧化碳。 优选的氧化催化剂包括分散在成形氧化铝载体上的钌金属,其中至少60%的钌金属存在于从表面朝向中心延伸的带中,其宽度为从表面到 成型氧化铝载体的中心。 当带包含50%的氧化铝载体并且含有至少60%的钌金属时,观察到在低于130℃的低优先氧化温度下的优异性能。 可以使用优先氧化催化剂来减少供应到燃料电池的燃料气流中的一氧化碳,其中一氧化碳将中毒活性贵金属膜,并且较高的优先氧化温度可降低气流的氢含量。