高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (7): 1470-1476.doi: 10.7503/cjcu20200197

• 庆祝《高等学校化学学报》复刊40周年专栏 • 上一篇    下一篇

使用四乙基氢氧化铵作为有机模板剂和常规硅铝源直接合成SSZ-13沸石分子筛

栾慧敏1,陈伟2,吴勤明1,*(),徐好1,韩世超1,孟祥举1,郑安民2,肖丰收1,*()   

  1. 1.浙江大学化学系, 浙江省应用化学重点实验室, 杭州 310028
    2.中国科学院武汉物理与数学研究所, 波谱与原子分子国家重点实验室, 武汉磁共振中心, 武汉 430071
  • 收稿日期:2020-04-11 出版日期:2020-07-10 发布日期:2020-05-11
  • 通讯作者: 吴勤明,肖丰收 E-mail:qinmingwu@zju.edu.cn;fsxiao@zju.edu.cn
  • 基金资助:
    国家自然科学基金(21720102001);国家自然科学基金(91634201);国家自然科学基金(21703203)

Direct Synthesis of SSZ-13 Zeolite Using Tetraethylammonium Hydroxide as an Efficient Organic Template in the Presence of Conventional Aluminum and Silicon Sources

LUAN Huimin1,CHEN Wei2,WU Qinming1,*(),XU Hao1,HAN Shichao1,MENG Xiangju1,ZHENG Anmin2,XIAO Fengshou1,*()   

  1. 1. Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2020-04-11 Online:2020-07-10 Published:2020-05-11
  • Contact: Qinming WU,Fengshou XIAO E-mail:qinmingwu@zju.edu.cn;fsxiao@zju.edu.cn
  • Supported by:
    † National Natural Science Foundation of China(21720102001);National Natural Science Foundation of China(91634201);National Natural Science Foundation of China(21703203)

摘要:

使用四乙基氢氧化铵作为有机模板剂, 利用常规铝源和硅源而不需要高硅Y沸石作为起始原料, 同时加入适量的沸石晶种直接合成了SSZ-13沸石分子筛. 所合成的沸石产物结晶度好, 具有良好的水热稳定性, 并在氨选择性催化还原(NH3-SCR)反应中显示出优异的催化性能, 为其在工业上广泛应用提供了可能.

关键词: SSZ-13沸石, 四乙基氢氧化铵, 常规原料, 直接合成, NH3-SCR

Abstract:

High silica CHA zeolite(SSZ-13) has been commercially applied in selective catalytic reduction of NOx with ammonia currently, but the use of costly organic templates of N,N,N-trimethyl-adamantammonium hydroxide(TMAdaOH) in the synthesis strongly limits its industrial application. To solve this problem, it is developed a synthetic route using relatively low-cost organic templates such as tetraethylammonium hydroxide(TEAOH), but in this case it is necessary to use costly high silica Y zeolite as a starting source. In this report, we for the first time show that SSZ-13 zeolite could be synthesized directly from conventional silicon and aluminum sources using TEAOH as an efficient organic template by carefully adjusting the starting gels in the presence of SSZ-13 seeds. The obtained aluminosilicate SSZ-13 product has good crystallinity, uniform crystals, and excellent hydrothermal stability. Furthermore, copper-exchanged SSZ-13 zeolite has excellent catalytic performance in NH3-SCR reaction before and after hydrothermal treatment. The combination of good catalytic performance with low-cost synthesis offers a good opportunity for wide applications of this zeolite in the future.

Key words: SSZ-13 zeolite, TEAOH, Conventional source, Design synthesis, NH3-SCR

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