母体相组成对CO低变铜系催化剂性能的影响

使用XRD、TPR、TPD和活性评价装置等技术设备,研究Cu-Zn-Al催化剂母体相组成对其催化性能的影响。结果表明,母体为HZ相的催化剂活性高,母体为FC相的热稳定性好,母体以ML相为主相的催化剂性能差。通过选择适宜的Cu/Zn/Al比和控制制备条件,获得适宜比例的FC、HZ、ML三相态混合母体是制备性能优良的低变催化剂的基础。制备出了活性高、热稳定性好的CO低温变换催化剂。

THE EFFECTS OF THE PRECURSOR COMPOSITION OF A Cu-BASED CATALYST FOR CO LOW TEMPERATURE SHIFT ON ITS PROPERTY

By using XRD, TPR, TPD and activity evaluation technique, the effect of precursor composition of catalyst on its properties has been studied. The results show that the property of catalyst depends highly on its precursor composition. The catalyst made from HZ precursor has a high activity. The catalyst made from FC precursor has high thermal stability. However, the catalyst made from ML precursor has a low activity and thermal stability. Selecting Cu/Zn/Al ratio, controling experimental conditions, and mixing precursor of various ratio between FC, HZ and ML are the bases for the preparation of catalysts with high quality. An alternative approach of catalyst preparation is the use of mixing precursor of suitable ratio as the precursor for the catalyst. A good catalyst for CO low temperature shift has been developed.