NiO在NaY分子筛上的分散研究  

STUDY OF NiO DISPERSION ON THE SURFACE OF NaY ZEOLITE

作　　者：汪跃民[1] 臧雅茹[1] 赵学庄[1] 缪方明[1] 王瑾玲[1] 

机构地区：[1]南开大学化学系,天津师范大学化学系

出　　处：《Chinese Journal of Catalysis》1995年第6期482-486,共5页催化学报（英文）

基　　金：国家自然科学基金

摘　　要：用ＸＲＤ和ＩＲ对ＮｉＯ在ＮａＹ分子筛上的分散进行了研究．结果表明，采用多次侵渍能提高ＮｉＯ的分散量，而焙烧温度的改变对此没有明显的影响．得到ＮｉＯ的最大分散量为２５％．同时发现，ＮｉＯ分散相与ＮａＹ之间存在着较强的相互作用，使分子筛的热稳定性降低；随着ＮｉＯ分散量的增大，ＮａＹ结构遭到破坏的程度加大．对ＮｉＯ在ＮａＹ表面存在的状态提出了选择分布的模型．iO dispersion on NaY surface has been investigated by using XRD and iR spectroscopy. The results show that the NiO dispersion capacity can be enhanced through Increasing the number of times of impregnation, but can not be changed by the calcination temperature. The utmost dispersion capacity is about 25%.It is also found that the dispersed NiO phase interacts strongly with NaY. As a result, the thermal stability of the zeolite decreases, and the more the dispersed NiO content, the more the crystalline structure of NaY is destroyed. A selective distribution model concerning the NiO state on the internal surface of NaY has been proposed.

关 键 词：氧化镍 分子筛 分散量 分散模型 

分 类 号：TQ426.81[化学工程]