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分别以K2RuO4,Ru(Ac)3和RuC13为Ru前驱体,制备了Ru/MgO-CeO2催化剂,并运用X射线衍射、X射线荧光光谱,CO吸附、N2物理吸附和H2程序升温还原等技术对催化剂进行了表征,考察了Ru前驱体对Ru/MgO-CeO2催化剂氨合成性能的影响.结果表明,Ru前驱体对载体MgO-CeO2和Ru的还原件能、氯残留量和催化剂比表面积的影响都很大,从而导致催化剂的氨合成性能的不同.其中以K2RuO4为Ru前驱体制备的催化剂的载体和Ru容易还原,无氯离子,且比表面积较高,因而催化剂活性和氨合成转换频率较高.在10MPa,425℃,10 000h-1条件下,K2RuO4,Ru(Ac)3和RuC13作前驱体制备的催化剂上氨合成转换频率比为1.33:1.05:1.

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