易潮解化合物AlCl_3和FeCl_3在载体表面的分散状态及分散量

DISPERSION STATE AND DISPERSION CAPACITY OF AlCl 3 AND FeCl 3 ON γ Al 2O 3 SURFACE

易潮解化合物ＡｌＣｌ３和ＦｅＣｌ３在载体表面的分散状态及分散量宗越潘晓民段连运＊谢有畅（北京大学物理化学研究所，北京１００８７１）关键词氯化铝，氯化铁，氧化铝，分散状态，分散阈值，Ｘ射线衍射无水ＡｌＣｌ３和无水ＦｅＣｌ３同属Ｌ酸，在酸催化中起着重要的...

It is difficult to investigate the dispersion of anhydrous AlCl 3 and FeCl 3 on support surfaces because of their deliquescence. A special sample holder equipped with waterproof cover was used for studying the dispersion state of AlCl 3 and FeCl 3 by using XRD method. The data collected show that both anhydrous AlCl 3 and FeCl 3 can disperse spontaneously onto γ Al 2O 3 surface, and the dispersion thresholds of AlCl 3 and FeCl 3 are 3 3 and 2 1 mg/m 2 respectively. These values exceed their maximum dispersion capacity based on the close packing monolayer model. This result suggests that the multilayer structure of AlCl 3 and FeCl 3 formed on the Al 2O 3 surface owing to that the AlCl 3 and FeCl 3 prefer to polymerize.