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Structure and properties of copper-based catalysts for methanol synthesis prepared by different precipitation methods
Author(s): 
Pages: 9-13
Year: Issue:  2
Journal: NATURAL GAS CHEMICAL INDUSTRY

Keyword:  甲醇合成铜基催化剂CuO/ZnO/Al2O3沉淀方式;
Abstract: 采用3种不同的沉淀方式(正加、反加和并流)制备出3个具有相同组成的甲醇合成催化剂样品CuO/ZnO/Al2O3,它们的活性顺序为:并流法样品>反加法样品>正加法样品;还原温度由低到高的顺序为:反加法样品<并流法样品<正加法样品.通过对催化剂前驱物进行DTA分析,证实了3种沉淀过程中相应的Cu2+和Zn2+的沉淀行为,即在并流和反加沉淀过程中,Cu2+和Zn2+同时均匀地沉淀,而在正加沉淀过程中,Cu2+和Zn2+发生分步沉淀.催化剂氧化态的IR结果表明了由3种沉淀方式所获得的样品中CuO和ZnO组分间相互作用的强弱.
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