高等学校化学学报2021，Vol.42Issue(6)：1716-1722,7.DOI:10.7503/cjcu20200855
利用适用于SAPO-34的有机结构导向剂合成SSZ-13分子筛
Exploring Organic Structure-directing Agents Used for SAPO-34 to Synthesize SSZ-13
摘要
Abstract
The aluminosilicate zeolite SSZ-13 and zeolitic silicoaluminophosphate molecular sieve(SAPO MS)SAPO-34 have been widely used in commercialized catalytic applications,such as the methanol-to-olefins (MTO)process and the selective catalytic reduction of NOx with NH3(NH3-SCR). Nowadays,a variety of commercialized organic structure-directing agents(OSDAs)have been utilized for preparing SAPO-34,while the OSDAs for synthesizing SSZ-13 still mainly relies on the classical N,N,N-trimethyladamantammonium hydroxide(TMAdaOH). Therefore,it is of great significance to seek for the suitable OSDAs,which can direct the synthesis of SSZ-13 with higher cost performance and appliable high silicon-to-alumina ratio(SAR). Herein,three OSDAs used for preparing SAPO-34[diisopropylamine(DIPA),dipropylamine(DPA) and n-butylamine(nBA)]were successfully employed for synthesizing SSZ-13 by partial replacing the expensive TMAdaOH with or without the assistance of seeds. Systemic investigation focused on SSZ-13 preparation was explored by powder X-ray diffraction(PXRD)and solid-state nuclear magnetic resonance(ss-NMR)analyses. As a result,the as-synthesized SSZ-13 zeolites possess a tunable range of SARs(11―22)and Cu-SSZ-13 cata-lysts show excellent NH3-SCR performance compared with commercialized ones. The crystallization mechanism of SSZ-13 synthesized by DIPA and TMAdaOH were also studied and the addition of DIPA would accelerate the crystallization process,improve the yields,and prevent the formation of amorphous phase. The work pre-sented here might provide new insights for identifying more efficient and commercialized OSDAs for preparing SSZ-13 with tailored properties.关键词
多孔材料/分子筛/结构导向剂/SSZ-13/SAPO-34Key words
Porous material/Zeolite/Organic structure-directing agent/SSZ-13/SAPO-34分类
化学化工引用本文复制引用
王磊,孙毯毯,闫娜娜,马超,刘晓娜,田鹏,郭鹏,刘中民..利用适用于SAPO-34的有机结构导向剂合成SSZ-13分子筛[J].高等学校化学学报,2021,42(6):1716-1722,7.基金项目
国家自然科学基金(批准号:21972136,21676262,21991091)、中国科学院百人计划(批准号:Y706071202)、中国科学院洁净能源创新研究院合作基金(批准号:DNL201908)和中国科学院前沿科学重点研究计划(批准号:QYZDBSSW-JSC040)资助. This paper is supported by the National Natural Science Foundation of China(Nos.21972136,21676262,21991091),the CAS Pioneer Hundred Talents Program(No.Y706071202),the Dalian National Laboratory for Clean Energy(DNL)Cooperation Fund,Chinese Academy of Sciences(No.DNL201908)and the Key Re-search Program of Frontier Sciences,Chinese Academy of Sciences(No.QYZDBSSW-JSC040). （批准号:21972136,21676262,21991091）
