Carbon monolith supported Fe-Based catalyst Boosts olefins production performance of Fischer-Tropsch synthesis via enhanced Mass-Transfer effect

Yang Wang, Ruosong He, Kaixuan Huo, Pei Dong*, Xiaoli Fu, Shujie Sun, Feng Qiu, Yiwu Lu, Qiang Liu, Guangbo Liu, Noritatsu Tsubaki, Mingbo Wu

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

抄録

Even though the carbon-based Fischer-Tropsch synthesis (FTS) catalysts deliver excellent performance owing to the outstanding physicochemical property of carbon materials, the poor mechanical strength and difficulty in formability are the bottlenecks for their practical and industrial applications, especially in a fixed-bed reactor. To tackle this obstacle, we propose a stepwise heat treatment protocol to successfully fabricate a biomass-derived monolithic carbon material with favorable mechanical strength. The carbon monolith can be employed as promising Fe-based active sites carrier to boost the olefins production performance of FTS. Compared with the powdered counterpart under the same reaction conditions (260 °C, 3 MPa, CO:H2 = 1:2, GHSV = 3000 mL gcat−1h−1), the catalytic activity of the monolithic catalyst is significantly increased from 37.2 % to 64.3 % while maintaining the high selectivity of olefin products (68.1 %), therefore the maximum olefin space–time yield approaching to extremely high value of 666 mg gFe3O4-1h−1 (260 °C, 3 MPa, CO:H2 = 1:2, GHSV = 6000 mL gcat−1h−1). Multiple characterizations reveal that the formation of interconnected monolithic structure can be attributed to the dehydration-polymerization reaction between the biomass carbon and binder. Based on the heat and mass transfer simulations, it is obvious that the monolithic catalyst possesses superior mass and heat transfer performance and better reactants diffusion behaviors, which contribute to the formation of more χ-Fe5C2 active phase for C-O bond activation and C-C bond coupling. This work will shed new light on the rational design of highly efficient monolithic FTS catalyst with remarkable strength for practical application at large scale.

本文言語英語
論文番号162502
ジャーナルChemical Engineering Journal
512
DOI
出版ステータス出版済み - 2025/05/15

ASJC Scopus 主題領域

  • 化学一般
  • 環境化学
  • 化学工学一般
  • 産業および生産工学

引用スタイル