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  

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

作　　者：栾慧敏 陈伟 吴勤明[1] 徐好 韩世超 孟祥举[1] 郑安民[2] 肖丰收[1] LUAN Huimin;CHEN Wei;WU Qinming;XU Hao;HAN Shichao;MENG Xiangju;ZHENG Anmin;XIAO Fengshou(Key Laboratory of Applied Chemistry of Zhejiang Province,Department of Chemistry,Zhejiang University,Hangzhou 310028,China;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)

机构地区：[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

出　　处：《高等学校化学学报》2020年第7期1470-1476,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21720102001,91634201,21703203)资助.

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.High silica CHA zeolite(SSZ-13)has been commercially applied in selective catalytic reduction of NO x 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 NH 3-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.

关 键 词：SSZ-13沸石 四乙基氢氧化铵 常规原料 直接合成 NH3-SCR 

分 类 号：O643[理学—物理化学]