1. Stabilized ε-Fe2C catalyst with Mn tuning to suppress C1 byproduct selectivity for high-temperature olefin synthesis.
- Author
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Qian, Fei, Bai, Jiawei, Cai, Yi, Yang, Hui, Cao, Xue-Min, Liu, Xingchen, Liu, Xing-Wu, Yang, Yong, Li, Yong-Wang, Ma, Ding, and Wen, Xiao-Dong
- Subjects
ALKENES ,PRUSSIAN blue ,CATALYSTS ,CATALYTIC activity ,MANUFACTURING processes - Abstract
Accurately controlling the product selectivity in syngas conversion, especially increasing the olefin selectivity while minimizing C1 byproducts, remains a significant challenge. Epsilon Fe
t>2C is deemed a promising candidate catalyst due to its inherently low CO 2 selectivity, but its use is hindered by its poor high-temperature stability. Herein, we report the successful synthesis of highly stable ε-Fe2 C through a N-induced strategy utilizing pyrolysis of Prussian blue analogs (PBAs). This catalyst, with precisely controlled Mn promoter, not only achieved an olefin selectivity of up to 70.2% but also minimized the selectivity of C1 byproducts to 19.0%, including 11.9% CO2 and 7.1% CH4 . The superior performance of our ε-Fe2 C-xMn catalysts, particularly in minimizing CO2 formation, is largely attributed to the interface of dispersed MnO cluster and ε-Fe2 C, which crucially limits CO to CO2 conversion. Here, we enhance the carbon efficiency and economic viability of the olefin production process while maintaining high catalytic activity. Epsilon Fe2C is considered a promising catalyst for syngas conversion due to its inherently low CO2 selectivity, but its application is limited by poor high-temperature stability. Here the authors present a successful method for synthesizing highly stable ε-Fe2C using a nitrogen-induced strategy through the pyrolysis of Prussian blue analogs. [ABSTRACT FROM AUTHOR] more...- Published
- 2024
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