不同K源对NaY分子筛合成的影响  

Impact of different K on synthesis of NaY zeolite

作　　者：赵红娟 谢恒 刘宇航 王久江 刘宏海 张君屹 Zhao Hongjuan;Xie Heng;Liu Yuhang;Wang Jiujiang;Liu Honghai;Zhang Junyi(Lanzhou Petrochemical Research Centre,Petrochemical Research Institute,PetroChina,Lanzhou 730060,Gansu,China;Lanzhou Petrochemical Company,PetroChina,Lanzhou 730060,Gansu,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：《工业催化》2024年第6期44-49,共6页Industrial Catalysis

基　　金：兰州市科技计划项目(2022-1-3);中国石油科技项目(2022ZG16)。

摘　　要：通过向水玻璃中添加不同的钾源(KCl和KOH),考察其对NaY分子筛合成的影响,并采用XRD、N 2物理吸附-脱附及SEM对样品进行表征。结果表明,当水玻璃中的K+浓度为0.1 mol·L^(-1)时,无论何种K源都不会对NaY分子筛的合成造成影响。而K+浓度增加到0.2 mol·L^(-1)时,添加KCl的合成体系中有极少量的杂晶生成,相对结晶度降至74%,进一步增加K+浓度到0.3 mol·L^(-1)、0.4 mol·L^(-1)时,样品中出现了大量的无定型物质。而在添加KOH的体系中,相同K添加量下,KOH对NaY分子筛的影响要远小于KCl。随着添加量的增加,相对结晶度和比表面积也呈下降趋势。SEM表征结果表明,KOH添加量增加到0.3 mol·L^(-1)、0.4 mol·L^(-1)时,合成样品中没有无定形物质形成,但出现了大量菱沸石,说明KOH导向生成菱沸石。By adding different potassium(KCl and KOH)into water glass,the effects of K on the synthesis of NaY zeoilte were investigated.The prepared samples were characterized by XRD,N 2 adsorption-desorption,and SEM.The results indicated that when the concentration of K+in water glass was 0.1 mol·L^(-1),both K compound had no negative impacts on synthesized NaY zeolite.When the K+concentration increased to 0.2 mol·L^(-1),a very small amount of heterocrystals were generated in the synthesis system with KCl added,and the relative crystallinity decreased to 74%.Further increasing the K+concentration to 0.3 mol·L^(-1)and 0.4 mol·L^(-1)resulted in a large amount of amorphous substances in the sample.However with the addition of KOH,the effect of KOH on the synthesis of NaY zeolite was much smaller than that of KCl at the same K addition amount.As the KOH increased,the relative crystallinity and specific surface area decresed.The SEM characterization results showed that even when the addition of KOH increased to 0.3 mol·L^(-1)or 0.4 mol·L^(-1),there was no amorphous substance formed in the synthesized sample,but a large amouant of chabasite appeared.

关 键 词：催化剂工程 NAY分子筛 KCL KOH K源 

分 类 号：TQ426.6[化学工程] TQ424.25