Selective oxidation of carbon monoxide in a hydrogen-rich fuel cell feed using a catalyst coated microstructured reactor
Selective oxidation of carbon monoxide in a hydrogen-rich fuel cell feed using a catalyst coated microstructured reactor
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DOI：
10.1016/j.cattod.2005.09.008
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发表时间：
2005-12
期刊：
影响因子：
5.3
通讯作者：
V. Cominos;V. Hessel;C. Hofmann;G. Kolb;R. Zapf;A. Ziogas;E. R. Delsman;J. J. Schouten-J.
中科院分区：
文献类型：
--
作者：
V. Cominos;V. Hessel;C. Hofmann;G. Kolb;R. Zapf;A. Ziogas;E. R. Delsman;J. J. Schouten-J.
已知一氧化碳对质子交换膜燃料电池催化剂是有毒的。富氢重整产物流中一氧化碳的选择性氧化被认为是一种最有潜力将浓度降低到耐受水平的实用方法。在目前的工作中，使用微结构反应器在过量氢气和二氧化碳的存在下，在15500 h-1的GHSV和高达160°C的温度下，研究了九种不同的贵金属催化剂。活性最高的是Pt-Ru/γ-Al_2O_3、Rh/γ-Al_2O_3和Pt-Rh/γ-Al_2O_3，但最稳定的是Pt-Rh/γ-Al_2O_3。还使用湿进料并在31000 h-1的GHSV下研究了其活性。发现水促进催化剂活性，而在更高的GHSV下，需要更高的温度来实现完全的一氧化碳转化。该催化剂在微结构反应器中稳定运行50 h，当氧碳比为4时，一氧化碳可降到10 ppm，降率为1.12%。
Carbon monoxide is known to be poisonous to the proton exchange membrane fuel cell catalyst. Selective oxidation of carbon monoxide in a hydrogen-rich reformate stream is considered to be a practical method with the most potential for reducing concentrations down to tolerant levels. In the present work, nine different noble metal catalysts were investigated using a microstructured reactor in the presence of excess hydrogen and carbon dioxide at a GHSV of 15500h−1and at temperatures up to 160°C. The most active were Pt–Ru/γ-Al2O3, Rh/γ-Al2O3and Pt–Rh/γ-Al2O3yet the most stable was Pt–Rh/γ-Al2O3. Its activity was also investigated using a wet feed and also at a GHSV of 31000h−1. Water was found to promote the catalyst activity while at higher GHSV higher temperatures were required to achieve full carbon monoxide conversion. The catalyst exhibited steady performance in the microstructured reactor for 50h while reducing 1.12% carbon monoxide to 10ppm with inlet oxygen to carbon monoxide ratio of 4.