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为使CO在常温下氧化为CO_2,本工作选择了活性碳纤维作为催化剂载体,以PdCl_2-CuC_2-Cu(NO_3)2为活性组份,比较了三种活化方法制备的活性碳纤维其比表面积及羧基含量的变化。用FT-IR及XPS方法测试了载体表面含氧官能团与活性组份之间的相互作用。考察了载体比表面不同时,对CO氧化性能的影响。研究了钯含量、温度、预饱和水温对催化活性的影响。对反应动力学进行了初步考察,测定的表观活化能约为15.8千卡/克分子。催化剂在20—40℃、空速为10000小时~(-1)的条件下,可使浓度为4×10~3ppm的CO有效的氧化为CO_2。
In order to oxidize CO to CO_2 at room temperature, activated carbon fiber was selected as the catalyst carrier and PdCl_2-CuC_2-Cu (NO_3) 2 as the active component. The activated carbon fibers prepared by the three activation methods were compared in their specific surface area and carboxyl group Changes in content. The interaction between the oxygen-containing functional groups on the support surface and the active components was tested by FT-IR and XPS methods. The effect of different specific surface area on the oxidation performance of CO was investigated. The effects of palladium content, temperature and pre-saturated water temperature on the catalytic activity were studied. The reaction kinetics was initially investigated, and the apparent activation energy measured was about 15.8 kcal / mol. Under the condition of 20-40 ℃ and airspeed of 10,000 h -1, the catalyst can effectively oxidize CO 4 × 10 ~ 3ppm into CO 2.