论文部分内容阅读
采用一种改进的胶束辅助合成方法,成功地制备了一系列含铜钴氧化物的xCuyCo/NS-MS-s介孔分子筛催化剂.以气相甲苯作为VOCs的代表污染物,考察了催化剂对甲苯的去除效果.通过各种表征手段,对催化剂的结构、形貌以及Cu-Co双金属物种的化学状态等物理、化学性质进行了详细的表征.结果表明,当双金属之比控制为nCu:nCo=1:3时,催化剂具有最佳的甲苯催化燃烧活性(甲苯转化率50％时的温度T50=232℃,甲苯转化率99％时的温度T99=239℃)以及良好的稳定性.“,”A series of dual copper-cobalt oxides-containing mesoporous molecular sieve catalysts xCuyCo/NS-MS-s were successfully fabricated by an improved micelle-assisted synthetic method. Taking gaseous toluene as the repre-sentative pollutant of VOCs, the removal effect of toluene by the catalysts was investigated. The physicochemical properties including structure, the morphology of catalysts, and the chemical status of Cu-Co bimetallic species were detailedly identified through various characterizations. The results showed that when the ratio of bimetal was con-trolled as nCu:nCo=1:3, the catalyst had the best catalytic combustion activity of toluene (T50=232 ℃, T99=239 ℃, where T50 is the reaction temperature when the toluene conversion is 50％, and T99 is the reaction temperature when the toluene conversion is 99％) and good stability.