标題: Comparative Study of Different Mesostructured Silica-supported Nano-iron Catalysts for Fischer-Tropsch Synthesis

作者: Liu, YQ (Liu, Yaqian); Wu, F (Wu, Feng); You, ZX (You, Zhixiong); Li, JJ (Li, Jinjun)

來源出版物: CATALYSIS LETTERS  DOI: 10.1007/s10562-024-04764-1  Early Access Date: JUN 2024  Published Date: 2024 JUN 21  

摘要: Fischer-Tropsch synthesis (FTS) converts syngas into multi-carbon products, whose distribution is highly dependent on the catalyst structure. Here, nano-iron catalysts with different silica supports were prepared, and their activities and durability for Fischer-Tropsch to olefins (FTO) process were investigated. Fe/KCC-1 demonstrated the best FTO catalytic selectivity of 25.0% for C2-4= and an olefin-to-paraffin ratio of 1.68. Its open pore structure allowed primary olefins to escape quickly from the catalyst surface, lowering the probability for secondary reactions. However, its durability was lower than Fe/SBA-15 due to coke formation, pore structure collapse and Fe particle agglomeration. The thermal stability of SBA-15 resulted in its better durability, and the encapsulated Fe particles inside the cylindrical mesopores also allowed better resistance to sintering. However, the less open structure of Fe/SBA-15 led to longer residence time for the primary olefins and increased possibility for secondary reactions, causing undesired chain growth.

作者關鍵詞: Light olefin; Fischer-Tropsch synthesis; Iron-based catalysts; Mesoporous silica; Catalyst morphology

KeyWords Plus: PORE-SIZE; PERFORMANCE; SYNGAS; ACID

地址: [Liu, Yaqian; Wu, Feng; You, Zhixiong; Li, Jinjun] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

通訊作者地址: Li, JJ (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

電子郵件地址: lijinjun@whu.edu.cn

影響因子：2.3