NO_x adsorbent formulation research by uniform design

In order to develop a nitric oxides adsorbent, some kinds of natural minerals were used in the presented study. A series of adsorbents were prepared according to uniform design and the adsorbing abilities were determined. The regression equations were drawn and the best formulation named JA was obtained from the equations. JA was prepared according to the formulation, and the adsorbability was also determined. Results showed that the absorbent JA can adsorb 156.7mg of NO and 289.9mg of NO₂ simultaneously in 3 hrs and the saturated adsorption quantity of NO_x is 22.2% in experiment conditions, which is far better than that of active carbon. Comparing with traditional orthogonal design, experiments designed by uniform design can attain the purpose by fewer experiments. It can also obtain quantitative regression equations accurately on the basis of the results of the experiments. The equations are also helpful in results analysis.