TPR and TPD studies of effects of Cu and Ca promotion on Fe-Zn-based Fischer-Tropsch catalysts

Journal of Chemical Sciences

Sudip Maity1¹  Biswajit Chowdhury²  Olusola O James1 2¹ 

[1] Liquid Fuels Section, Central Institute of Mining and Fuels Research (CIMFR), Digwadih Campus, PO FRI 828 108, Dhanbad, India$$;Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, India$$

关键词: Iron-based Fischer-Tropsch catalysts;    TPR;    TPD;    carburization.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) were used to study the effects of Cu and Ca promotion on Fe-Zn-based Fischer-Tropsch catalysts. The reduction temperature for Fe2O3 → Fe3O4 was unaffected by Ca addition but decreased when promoted with Cu. Fe-Zn promoted with Cu and Ca showed even much lower reduction temperature for Fe2O3→Fe3O4. Ca promotion enhances carburization and increases surface acidity and basicity of the Fe-Zn oxide precursor. While Cu inhibits carburization and decreases the surface acidity and basicity of the Fe-Zn oxide precursor. The implications of these effects on the application of catalysts for FT are discussed.

【 授权许可】

Unknown