无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (4): 120-124.doi: 10.19964/j.issn.1006-4990.2022-0367

• 催化材料 • 上一篇    下一篇

异型晶种对NaY分子筛合成的影响

赵红娟1(), 王久江1, 刘宇航2, 李宁2, 曹庚振1, 刘宏海1()   

  1. 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
  • 收稿日期:2022-06-16 出版日期:2023-04-10 发布日期:2023-04-13
  • 通讯作者: 刘宏海(1969— ),男,博士,教授级高级工程师,主要研究方向为催化新材料的研究和催化裂化催化剂的开发; E-mail:liuhonghai@petrochina.com.cn
  • 作者简介:赵红娟(1977— ),女,硕士,高级工程师,主要研究方向为分子筛材料的合成和应用;E-mail:zhj_snowman@163.com
  • 基金资助:
    中国石油天然气股份有限公司基金项目(2022ZG16)

Impact of heterogenous crystal seeds on synthesis of NaY zeolite

ZHAO Hongjuan1(), WANG Jiujiang1, LIU Yuhang2, LI Ning2, CAO Gengzhen1, LIU Honghai1()   

  1. 1. Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China
    2. Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, China
  • Received:2022-06-16 Published:2023-04-10 Online:2023-04-13

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。

关键词: NaY分子筛, 异型晶种, 菱沸石

Abstract:

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 relative 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 crystals.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 crystal content of chabazite was increased greatly.The relative crystallinity of NaY zeolite was less than 80%.And also the surface area and acidity were decreased which seriously affected the quality of NaY zeolite.

Key words: NaY zeolite, heterogenous seed, chabazite

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