Preparation and catalytic properties of honeycomb catalyst for hydrogen isotope oxidation

作者：Wu Quanwen; Zheng Zhenhua; Huang Zhiyong; Meng Daqiao; Luo Wenhua^*

来源：Fusion Engineering and Design, 2015, 92: 46-51.

DOI：10.1016/j.fusengdes.2015.01.013

• Honeycomb catalyst
• Noble metal
• Al2O3 wash coating
• Hydrogen oxidation
• Detritiation

The method of catalytic oxidation and adsorption is widely used for atmosphere detritiation. But traditional particle catalyst has large gas resistance, which limited the space velocity for detritiation. Honeycomb catalyst can enormously increase the gas handling capacity due to its low pressure drop and high dispersity of active ingredients, but has not been used in detritiation so far. A coating of alumina was deposited on the honeycomb substrate of cordierite using ultrasonic technology. By the method of excessive impregnating, noble metal (Pt or Pd) supported catalysts were prepared. The catalysts were characterized by X-ray diffraction (XRD), N-2-adsorption/desorption (Brunauer-Emmet-Teller - BET method), scanning electron microscope (SEM) and laser particles sizer. The result shows that the alumina coatings are well distributed, well knitted and the specific surface area of honeycomb catalyst rises to about 20 m(2)/g. Catalytic activities were evaluated by H-2 conversion rate in gas mixture (with different H-2 concentration and various flow rates). The results indicated that all catalysts exhibited excellent catalytic performance for Hy oxidation; the conversions of hydrogen were 100% at room temperature when the gas space velocity was up to 6 x 10(5) h(-1). 2015 Elsevier B.V.

• 出版日期2015-3
• 单位中国工程物理研究院