1. Long-chain α-olefins production over Co-MnOx catalyst with optimized interface.
- Author
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Zhu, Min-Li, Liu, Xingwu, Niu, Yiming, Yang, Guo-Qing, Bao, Jun, Song, Yong-Hong, Yan, Yi-Fan, Du, Ning, Shui, Mei-Ling, Zhu, Kaiyu, Zhang, Bingsen, Liu, Zhao-Tie, Ma, Ding, and Liu, Zhong-Wen
- Subjects
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CATALYSTS , *WATER gas shift reactions , *STYE - Abstract
In this work, we report a carbon-mediated strategy to construct supported Co-MnO x nano-interfacial catalyst that enables highly selective synthesis of long-chain linear α-olefins (C 5+ =) via the Fischer-Tropsch (FT) reaction. The co-impregnation of glucose as the carbon precursor and metal salt aqueous solution over SiO 2 followed by pyrolysis and oxidation creates a catalyst with stable and rich Co-MnO x nano-interfaces after reduction and under FT conditions, which are convincingly revealed from characterizations of the catalysts at different stages. The optimal catalyst is stable for over 400 h without an observably decreased CO conversion, and the highest space-time yield of C 5+ = is achieved to be 0.79 g·g Co −1·h−1, which are mainly originated from the suppressed sintering of metallic Co and favored CO adsorption/dissociation with a reasonably inhibited H 2 co-adsorption. The simple procedure and broad availability of precursors make our developed strategy a practically important surface-engineering method capable of precisely fabricating stable nano-interfacial catalysts. [Display omitted] • Carbon-mediated method is explored for constructing Co-MnO x nano-interfacial catalyst. • The developed Co-MnO x catalyst is highly active and stable for Fischer-Tropsch reaction. • STY of 0.79 g·g Co −1·h−1 for C 5+ olefins is achieved over the optimal Co-MnO x catalyst. • Maximized Co-MnO x perimeter facilitates a high surface coverage ratio of CO* (C*)/H*. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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