制备条件对SO_4^(2-)/ZrO_2固体超强酸含硫量的影响

Influence of preparation conditions on the sulphur content of SO_4^(2-)/ZrO_2 solid superacid

利用硫酸钡重量法对SO42-/ZrO2固体超强酸中的硫含量进行了分析。结果表明:随焙烧温度的升高SO42-/ZrO2存在两个SO42-的快速流失温度区,并与晶相转变温度相对应。此外,ZrOCl2,H2SO4,NH3·H2O的浓度及焙烧时间等制备条件对SO42-/ZrO2中的硫含量都存在较大影响。

The gravimetry of BaSO4 was used to determine the sulphur content of-/ZrO2. The results indicated that there are two temperature regions, which are corresponding to the temperatu re of crystalline transition, for sulphur removal along with calcinations temper ature rising. In addition the sulphur content was affected by other preparation conditions such as the concentration of ZrOCl2,H2SO4,NH3· H2O and calcinations time.