加氢催化剂载体工业焙烧方式的研究

STUDY ON INDUSTRIAL CALCINATION TECHNIQUES OF HYDROGENATION CATALYST SUPPORT

采用氮气吸附-脱附、红外光谱、氨程序升温脱附、X射线衍射等表征手段,分别对热辐射式和热风循环式焙烧技术制备的加氢催化剂载体的机械强度、堆密度、孔体积、比表面积、晶相、酸性等进行对比分析。结果显示:热辐射式焙烧技术所得载体具有较高的强度、较低的堆密度,晶体生长过程更平稳;热风循环式焙烧技术所得载体比表面积较大,小孔比例增加,具有更适宜的酸性中心分布,表现出更高的加氢活性。

The mechanical strength,bulk density,pore volume,specific surface,crystalline phase and acidity of hydrogenation catalyst support treated by heat radiation or hot air circulation calcination were characterized and compared using N 2 adsorption-desorption,FT-IR,NH 3-TPD and XRD.The results showed that the thermal radiation treated support had higher strength and lower density,and the crystal growth process was more stable.The support obtained by hot air circulating calcination technology possessed larger specific surface area,larger proportion of small pores,more suitable acidic center distribution and higher hydrogenation activity.