异型晶种对NaY分子筛合成的影响  

Impact of heterogenous crystal seeds on synthesis of NaY zeolite

作　　者：赵红娟 王久江 刘宇航 李宁[2] 曹庚振 刘宏海 ZHAO Hongjuan;WANG Jiujiang;LIU Yuhang;LI Ning;CAO Gengzhen;LIU Honghai(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China;Lanzhou Petrochemical Company,PetroChina,Lanzhou 730060,China)

机构地区：[1]中国石油石油化工研究院兰州化工研究中心,甘肃兰州730060 [2]中国石油兰州石化分公司,甘肃兰州730060

出　　处：《无机盐工业》2023年第4期120-124,共5页Inorganic Chemicals Industry

基　　金：中国石油天然气股份有限公司基金项目(2022ZG16)。

摘　　要：通过向NaY分子筛合成凝胶中添加不同量的异型晶种菱沸石,探讨了其对NaY分子筛合成的影响。结果表明,凝胶中不添加异型晶种菱沸石时,合成的NaY分子筛中并没有杂晶产生,相对结晶度达到了95%,SEM图显示全部为NaY分子筛的晶体形貌。而向其中添加少量的菱沸石后,就会导向凝胶生成菱沸石晶体,XRD物相分析和SEM表征都证实了菱沸石的存在。当添加量为0.8%时,发现有少量的菱沸石晶体形成,而添加量增加到1.2%和2.5%时,形成的菱沸石晶体含量增多,使NaY分子筛的相对结晶度低于80%,同时比表面积和酸性都有下降,严重影响了NaY分子筛的合成质量。By adding different amounts of heterogenous seeds of chabazite to the gel synthesized by NaY zeolite,the effect of them on the synthesis of NaY zeolite was discussed.The results showed that when no heterogenous crystal seeds was added to the aluminosilica gel for NaY synthesis,there was no impurity crystal in the synthesized NaY zeolite,and the rela⁃tive crystallinity of NaY was 95%.SEM images showed all the crystals were typical morphology of NaY zeolite.However,When a small amount of heterogenous seeds of chabazite was added,it would be directed to the gel to generate siderite crys⁃tals.XRD phase analysis and SEM characterization confirmed the existence of chabazite.When the adding amount was 0.8%,a small amount of chabazite crystals was formed.When the adding amount was increased to 1.2%and 2.5%,the crys⁃tal content of chabazite was increased greatly.The relative crystallinity of NaY zeolite was less than 80%.And also the sur⁃face area and acidity were decreased which seriously affected the quality of NaY zeolite.

关 键 词：NAY分子筛 异型晶种 菱沸石 

分 类 号：O643.36[理学—物理化学]