Application of a new color detection based method for the fast parallel screening of DeNO(x) catalysts.
Application of a new color detection based method for the fast parallel screening of DeNO(x) catalysts.
复制标题
应用基于颜色检测的新方法快速并行筛选 DeNO(x) 催化剂。
DOI：
10.1021/ja020629x
复制
发表时间：
2002
影响因子：
15
通讯作者：
F. Schüth
中科院分区：
文献类型：
--
作者：
O. Busch;C. Hoffmann;T. Johann;H. Schmidt;W. Strehlau;F. Schüth
建立了一种用于固体催化剂第一阶段筛选的快速平行检测新方法。这种方法是基于有机染料在反应气流中存在生成物或反应产物时的颜色变化。作为例子，研究了丙烯在贫氧和富氧条件下的NO分解和还原。通过将浸渍有机染料2，2‘-azinobis(3-ethylbenzthiazoline-6-sulfonic酸(ABTS)的滤纸从无色到蓝绿色的颜色变化来检测气流中NO的存在，并将其置于催化剂床后的气流中。催化剂文库由混合金属氧化物组成，通过浸渍活性碳和金属氧化物前驱体溶液并随后燃烧碳基质来合成。以γ-Al_2O_3为参比催化剂，比较了这些金属氧化物和铂的催化活性。然后，在高精度的平行流试验台上，对最活跃的化合物在静止和循环倾斜/到达操作下的Deno(X)性质进行了详细的研究。发现了一种很有前途的新型NO(X)储存催化剂。
A new fast parallel detection method for stage I screening of solid catalysts has been developed. This method is based on the color change of organic dyes in the presence of either educts or reaction products in a reaction gas flow. As an example, NO decomposition and NO reduction with propylene under lean or rich conditions were studied. The presence of NO in a gas stream was detected by the color change from colorless to blue-green of filter paper impregnated with an organic dye, 2,2'-azinobis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS), which was placed in the gas stream after the catalyst bed. The catalyst library was made up of mixed metal oxides, synthesized by impregnation of activated carbon with metal oxide precursor solutions and subsequent combustion of the carbon matrix. Catalytic activity of these metal oxides was compared to platinum on gamma-alumina as a reference catalyst. The most active compounds were then studied in detail for their DeNO(x)properties in a high precision parallel flow test rig under a stationary and cyclic lean/reach operation. A new promising NO(x) storage catalyst was discovered.