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  dispersion capacity
    DISPERSION STATE AND DISPERSION CAPACITY OF AlCl 3 AND FeCl 3 ON γ Al 2O 3 SURFACE
    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
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    The effect of various factors on the dispersion of ZnO on NaY surface has been studied by XRD and Raman spectroscopy. The utmost dispersion capacity of ZnO has been obtained through prolonged drying and by increasing the times of impregnation (0.46gZnO/gNaY),which is reasonably higher than the value of reference (0.22gZnO/gNaY).
    利用XRD、Raman光谱分析了影响ZnO在NaY表面分散的各种因素,发现延长干燥时间和多次浸渍能促进ZnO的分散,测得ZnO的最大分散量为0.46g/gNaY,已远大于文献结果。
短句来源
  dispersion capacity
    DISPERSION STATE AND DISPERSION CAPACITY OF AlCl 3 AND FeCl 3 ON γ Al 2O 3 SURFACE
    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
短句来源
    The effect of various factors on the dispersion of ZnO on NaY surface has been studied by XRD and Raman spectroscopy. The utmost dispersion capacity of ZnO has been obtained through prolonged drying and by increasing the times of impregnation (0.46gZnO/gNaY),which is reasonably higher than the value of reference (0.22gZnO/gNaY).
    利用XRD、Raman光谱分析了影响ZnO在NaY表面分散的各种因素,发现延长干燥时间和多次浸渍能促进ZnO的分散,测得ZnO的最大分散量为0.46g/gNaY,已远大于文献结果。
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By mixing(NH_4)_6M_(o7)O_(24)·4H_2O with mordenite zeolite and using microwave radiation technique,we have prepared the high dispersion catalyst successfully.The XRD results show that MoO_3 exists in the form of noncrystal in mordenite zeolite .At the radiation power 390 W and the radiation time 30 minute, the dispersion level reaches 100%, and the maximal dispersion value is 0. 198g/g by calculating the peaks intensity.。

将(NH_4)_6M_(o7)O_(24)·4H_2O与丝光沸石混合,用微波加热进行分解-分散制备MoO_3/NaM型催化剂-X射线衍射结果表明,MoO_3组分以非晶相存在于丝光沸石中,丝光沸石的晶体结构基本不受MoO_3分散的影响。经390W功率加热15min或260W功率加热30min,MoO_3分散率可达100%,由XRD峰强度法求得丝光沸石上MoO_3的最大分散量为0.198g/g.

Samples of NiO/Al2O3 and NiO/TiO2-Al2O3 were prepared by. impregnation. XRD and EXAFS were used to investigate the dispersity of NiO in the samples.The maximun dispersion values of NiO on Al2O3 and TiO2-Al2O3 were 0.065g NiO/100m2 and 0.081g NiO/100m2 respectively. It was found that Ni atoms were surrounded by fewer neighbour Ni atoms in NiO/TiO2-Al2O3 than in NiO/Al2O3 at low NiO loadings. Both the effects could be attributed to the addition of TiO2.

采用浸渍法制备了系列NiO/γ-Al2O3,NiO/TiO2-Al2O3催化剂样品,用XRD,EXAFS等方法对这些样品进行了分析.XRD相定量方法测得NiO在γ-Al2O3载体上的最大分散量为0.065gNiO/100m2Al2O3,而NiO在TiO2-Al2O3载体上的最大分散量为0.081gNiO/100m2TiO2Al2O3。EXAFS分析结果表明:TiO2的引入改变了NiO在载体表面上的分散状态.

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...

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.

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...

 
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