采用柠檬酸络合法制备了一系列不同含量Ba掺杂的ZrO2,再用浸渍法制备了K-Ru/Ba-ZrO2催化剂并将其用于氨合成反应.采用X射线衍射和CO2程序升温脱附技术考察了Ba含量对催化剂结构与性能的影响.结果表明,Ba掺入ZrO2后形成的BaZrO3有助于其负载的Ru催化剂氨合成活性的显著提高.在5.0MPa,10000h-1,425℃时,Ru/Ba-ZrO2(Ba∶Zr摩尔比为1∶1)催化剂活性最高,出口氨浓度和反应速率分别达9.24％和29.77mmol/(g·h).这主要归因于载体的强电子传导性能和碱性提高.
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