Boosting the turnover number of core-shell Al-ZSM-5@B-ZSM-5 zeolite for methanol to propylene reaction by modulating its gradient acid site distribution and low consumption diffusion
文献类型：期刊论文
| 作者 | Deng, Feng1; Xu, Jun1; Gong, Yanjun2,3; Zhang, Luoming2,3; Ma, Tong2,3; Wang, Wenxuan2,3; Song, Yu2,3; Shang, Yunshan2,3; Zhang, Shaolong2,3; Zhai, Yanliang2,3 |
| 刊名 | CATALYSIS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2019-02-07 |
| 卷号 | 9期号:3页码:659-671 |
| ISSN号 | 2044-4753 |
| DOI | 10.1039/c8cy02177e |
| 英文摘要 | Herein, a specific core-shell MFI zeolite was designed for the methanol to propylene (MTP) reaction. The core-shell structure of Al-ZSM-5@B-ZSM-5 and Al-ZSM-5@silicalite-1 were easily obtained via a two-step procedure, in which Al-ZSM-5 aggregate acted as the core and B-ZSM-5 or silicalite-1 as the shell. Their core-shell structures, acidity distribution and pore properties were characterized systemically, and new insights were gained into the synergetic effect of acid property and diffusion on the MTP reaction. The Al-ZSM-5@B-ZSM-5 zeolite exhibited a superior catalytic performance with a lifetime of 350 h (WHSV = 3 h(-1)), propylene selectivity of 49% and high turnover number of 4.3 x 10(6), while for the Al-ZSM-5 core, the corresponding values were 210 h, 43% and 5.2 x 10(5), respectively. Al-ZSM-5@silicalite-1 displayed the second best performance with the values of 250 h, 45% and 2.9 x 10(6), respectively. Gradient strong acid reduction from the core to the shell via the epitaxial growth of the silicalite-1 or B-ZSM-5 shell combined with an appropriate strong/weak acid ratio plays a vital role in inhibiting the hydrogen transfer reaction and thus gives a low consumption of propylene and low coke deposition. For the hydrogen transfer reaction of alkenes to form alkanes and aromatics, strong acid sites are required. Moreover, the acid sites originally existing on the external surface of the Al-ZSM-5 core were converted into internal acid sites due to the formation of an interface zone in the core-shell zeolite, possessing micropore characteristics, which in turn improve the shape selectivity and suppress coke deposition. Especially, the Al-ZSM-5@B-ZSM-5 zeolite displayed more weak acid sites and few strong acid sites on its shell surface, which are beneficial for the low formation of external coke and also account for the highest utilization of acid sites in the MTP reaction, high propylene selectivity and long lifetime. |
| WOS关键词 | ZSM-5 ZEOLITE ; HIERARCHICAL ZSM-5 ; COKE FORMATION ; CATALYTIC PERFORMANCE ; BORON INCORPORATION ; CRYSTALLITE SIZE ; HZSM-5 ZEOLITE ; CONVERSION ; HYDROCARBONS ; H-ZSM-5 |
| 资助项目 | State Key Development Program for Basic Research of China[2012CB215002] ; National Natural Science Foundation of China[21276278] ; National Natural Science Foundation of China[U1662116] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000459731200010 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 资助机构 | State Key Development Program for Basic Research of China ; State Key Development Program for Basic Research of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Development Program for Basic Research of China ; State Key Development Program for Basic Research of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Development Program for Basic Research of China ; State Key Development Program for Basic Research of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Development Program for Basic Research of China ; State Key Development Program for Basic Research of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/14286]  |
| 专题 | 中国科学院武汉物理与数学研究所 |
| 通讯作者 | Gong, Yanjun |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Hubei, Peoples R China 2.China Univ Petr, Key Lab Catalysis CNPC, Beijing 102249, Peoples R China 3.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, Feng,Xu, Jun,Gong, Yanjun,et al. Boosting the turnover number of core-shell Al-ZSM-5@B-ZSM-5 zeolite for methanol to propylene reaction by modulating its gradient acid site distribution and low consumption diffusion[J]. CATALYSIS SCIENCE & TECHNOLOGY,2019,9(3):659-671. |
| APA | Deng, Feng.,Xu, Jun.,Gong, Yanjun.,Zhang, Luoming.,Ma, Tong.,...&Zhai, Yanliang.(2019).Boosting the turnover number of core-shell Al-ZSM-5@B-ZSM-5 zeolite for methanol to propylene reaction by modulating its gradient acid site distribution and low consumption diffusion.CATALYSIS SCIENCE & TECHNOLOGY,9(3),659-671. |
| MLA | Deng, Feng,et al."Boosting the turnover number of core-shell Al-ZSM-5@B-ZSM-5 zeolite for methanol to propylene reaction by modulating its gradient acid site distribution and low consumption diffusion".CATALYSIS SCIENCE & TECHNOLOGY 9.3(2019):659-671. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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