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 | Gao, Beibei1,2; Yang, Miao1; Qiao, Yuyan1,2; Li, Jinzhe1; Xiang, Xiao1,2; Wu, Pengfei1,2; Wei, Yingxu1; Xu, Shutao1; Tian, Peng1; Liu, Zhongmin1 |
| 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 |
| 通讯作者 | Tian, peng(tianpeng@dicp.ac.cn) ; Liu, zhongmin(liuzm@dicp.ac.cn) |
| 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 |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000386210100021 |
| 出版者 | ROYAL SOC CHEMISTRY |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374995 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Tian, Peng; Liu, Zhongmin |
| 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 | Gao, Beibei,Yang, Miao,Qiao, Yuyan,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 | Gao, Beibei.,Yang, Miao.,Qiao, Yuyan.,Li, Jinzhe.,Xiang, Xiao.,...&Liu, Zhongmin.(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 | Gao, Beibei,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. |
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