制备条件对Cu-Fe系催化剂活性的影响

研究表明,cu-Fe系催化剂对于脂肪酸甲酯加氢制备高级脂肪醇具有很好的活性。本文研究了组成,pH值和焙烧温度等因素对其活性的影响。

制备高碳醇Cu-Fe系催化剂的TPD研究

采用Ｈ２－ＴＰＤ方法对比研究了不同条件下制备的Ｃｕ－Ｆｅ系催化剂及单组分样品．结果表明，共沉淀样品都有两个脱附峰，它对应了Ｈ２在催化剂表面上的两种结合状态，为Ｈ２的均裂和异裂提供了根据．根据脱附峰的大小，从活性位的角度解释了不同条件下制备的Ｃｕ－Ｆｅ系催化剂活性差异的原因．与单组分样品相比，由Ｈ２－ＴＰＤ峰脱附温度Ｔｍ的变化，讨论了催化剂组分间的相互作用，并根据加氢产物的ＩＲ谱，说明了两类活性中心的协同作用．

Iron-Oxide Cu-Au Mineralizing Systems： Eastern Yakutia Perspective

The GIS （geographic information system） used for predicting the associated with upper-intrusive zone of hydrothermal alteration IOCG （iron-oxide copper gold） mineralizing systems is shown by example of the northeast of Russian. IOCG ore deposits can have enormous geological resources with significant reserves of base, precious and strategic metals, are economically attractive targets for mineral exploration worldwide, but are still unknown in the northeast Russian. It was localized in Tarinskiy ore node （eastern Yakutia） field of brecciated altered rocks with sulfide and iron-oxide cement is a first in eastern Yakutia nature anomaly of IOCG-type with iron-oxide Cu-Au ± U specialization, that was formed close to the surface of Rep-Yuruinskiy pluton. It should be of interest as a new precious metals world class deposit type in northeast of Russia.

制备高碳醇用Cu－Fe系催化剂的活性相

用共沉淀法制备了Ｃｕ－Ｆｅ系催化剂，它是由脂肪酸甲酯加氢制备高碳醇的新催化体系．催化剂经焙烧后的物相为ＣｕＯ，γ－Ｆｅ２Ｏ３和ＭｇＯ，形成了活性相的结构前驱．在反应条件下，ＣｕＯ首先被还原为金属态的Ｃｕ０，然后γ－Ｆｅ２Ｏ３被还原为Ｆｅ３Ｏ４；Ｃｕ０和Ｆｅ３Ｏ４共同参与催化该反应．本文用ＸＲＤ，ＴＧ－ＤＴＡ和Ｍｏｓｓｂａｕｅｒ谱等手段，结合催化剂的活性测定，确定了催化剂的活性相为Ｃｕ０和Ｆｅ３Ｏ４；ＭｇＯ可改变催化剂的电子结构和几何构型。