耐温800℃陶瓷疏水催化剂的研制

Preparation of Ceramic Hydrophobic Catalyst Capable of Withstanding Temperature up to 800℃

用强酸对多孔疏水材料进行表面改性,获得疏水多孔陶瓷载体。采用浸渍法制备出耐温达800℃陶瓷基疏水催化剂,分别在低浓度氢-空气环境(φ(H2)=10-3)和低活度氚水环境(氚的放射性浓度1 570 kBq/L)中对其催化氧化效率和催化交换效率进行了测试,结果表明,在该疏水催化剂存在条件下,催化氧化反应的单程转化率为95%;同位素催化交换的单程转化率为81.7%。

In order to prepare hydrophobic catalyst which can withstand higher temperature and can be used for catalisis of reaction between hydrogen and oxygen and used for decontamination of tritium-containing gases.The ceramic hydrophobic catalyst carrier was prepared by processing porous hydrophobic zeolite with strong acid.Then the ceramic hydrophobic carrier was cavered with platinum by chemical deposition of Pt from a H2PtCl6 solution in acetone.Its catalytic-oxidation activation in lower hydrogen atmosphere and its isotopic exchanging activation in lower HTO solution were studied.The results show that the catalyst can withstand temperature up to 800 ℃.When the catalyst is used at room temperature a conversion efficiency of 95% for catalyzing the oxidation of hydrogen,and a conversion efficiency of 81.7% for catalizing the T-H isotopic exchange between HTO-H2 are observed.