A low-temperature approach to synthesize low-silica SAPO-34 nanocrystals and their application in the methanol-to-olefins (MTO) reaction
文献类型：期刊论文
| 作者 | Liu, Zhongmin1; Gao, Beibei1,2; Yang, Miao1; Qiao, Yuyan1,2; Li, Jinzhe1; Xiang, Xiao1,2; Wu, Pengfei1,2; Wei, Yingxu1; Xu, Shutao1; Tian, Peng1 |
| 刊名 | CATALYSIS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 6期号:20页码:7569-7578 |
| ISSN号 | 2044-4753 |
| DOI | 10.1039/c6cy01461e |
| 文献子类 | Article |
| 英文摘要 | A low-temperature strategy is developed for the synthesis of low-silica SAPO-34 with a tunable Si content and relatively uniform Si distribution in the crystals, which is hitherto difficult to achieve. It is demonstrated that a lower crystallization temperature and a silicon source with relatively low reactivity are important factors leading to successful synthesis. The crystal size of SAPO-34 could be effectively decreased to 200 nm through a seed-assisted approach. The local atom environments of low-silica samples are investigated by solid state MAS NMR, which confirms the unique existence of Si(4Al) species in the framework. The obtained low-silica SAPO-34 exhibits excellent catalytic performance in the MTO reaction and the occurrence of catalyst deactivation varies with the acid properties. Through optimizing the Si content of the samples, a long catalyst life and a high initial/maximum selectivity to ethylene plus propylene could be achieved simultaneously over SAPO-34 with a Si content of Si/(Si + Al + P) = 0.047. This result would be valuable for the improvement of the catalytic properties of SAPO-34 used for a commercial MTO fluidized-bed reactor. However, SAPO-34 with a very low Si content (e.g. Si/(Si + Al + P) = 0.039) exhibits a shortened catalyst life due to the insufficient Bronsted acid sites in spite of the high selectivity to light olefins. |
| WOS关键词 | SILICOALUMINOPHOSPHATE MOLECULAR-SIEVES ; SOLID-STATE NMR ; REACTION-MECHANISM ; HYDROCARBON FORMATION ; CATALYTIC-ACTIVITY ; THERMAL-STABILITY ; LIGHT OLEFINS ; CO-REACTION ; ZEOLITE ; DEACTIVATION |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000386210100021 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169978]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Liu, Zhongmin; Tian, Peng |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zhongmin,Gao, Beibei,Yang, Miao,et al. A low-temperature approach to synthesize low-silica SAPO-34 nanocrystals and their application in the methanol-to-olefins (MTO) reaction[J]. CATALYSIS SCIENCE & TECHNOLOGY,2016,6(20):7569-7578. |
| APA | Liu, Zhongmin.,Gao, Beibei.,Yang, Miao.,Qiao, Yuyan.,Li, Jinzhe.,...&Tian, Peng.(2016).A low-temperature approach to synthesize low-silica SAPO-34 nanocrystals and their application in the methanol-to-olefins (MTO) reaction.CATALYSIS SCIENCE & TECHNOLOGY,6(20),7569-7578. |
| MLA | Liu, Zhongmin,et al."A low-temperature approach to synthesize low-silica SAPO-34 nanocrystals and their application in the methanol-to-olefins (MTO) reaction".CATALYSIS SCIENCE & TECHNOLOGY 6.20(2016):7569-7578. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。