期刊
JOURNAL OF THE ENERGY INSTITUTE
卷 96, 期 -, 页码 31-37出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.joei.2021.02.003
关键词
Fischer-tropsch synthesis; Zr modification; Cobalt surface species; The impregnation sequence
资金
- National Natural Science Foundation of China [21736007, 21872162, U1710104, 21902170]
- Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences [XDA 21020202]
- ShanXi Provincial Research Foundation for Basic Research [201903D121039]
Regulating the impregnation order and amount of Zr and Co can significantly enhance the performance of Fischer-Tropsch synthesis. The co-impregnation of Zr and Co shows the most attractive catalytic performance, attributed to higher reducibility of the catalyst and the formation of Co-Zr interface.
In order to investigate the enhancement of Zr in FTS performance, a series of Zr-modified 20 wt% Co/Al2O3 catalysts has been prepared by regulating the Zr and Co impregnation order and Zr amount and then the catalytic performance were evaluated in a fixed reactor. The Zr addition leads to a significant increase in activity, olefin/paraffin ratio for C-3 and C-4 at a similar CO conversion, and selectivity to C-5(+); compared with the Co/Al2O3 catalysts. The co-impregnation of Zr and Co shows the most attractive catalytic performance. This can be attributed to the higher reducibility of the catalyst as well as the formation of Co-Zr interface. The introduction of Zr can enhance the interaction between C* and cobalt active sites and weaken the C O bond, making CO easier to be dissociated and the selectivity of C-5(+) is improved. (C) 2021 Energy Institute. Published by Elsevier Ltd. All rights reserved.
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