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Co / pillared clay bifunctional catalyst for controlling the product distribution of fischer − tropsch synthesis / Qing-Qing Hao in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9004–9011 Titre : Co / pillared clay bifunctional catalyst for controlling the product distribution of fischer − tropsch synthesis Type de document : texte imprimé Auteurs : Qing-Qing Hao, Auteur ; Guang-Wei Wang, Auteur ; Zhao-Tie Liu, Auteur Année de publication : 2010 Article en page(s) : pp. 9004–9011 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pillared  clays  Catalyst Résumé : Pillared interlayer clays (PILCs) were synthesized by pillaring montmorillonite with SiO2, Al2O3, and ZrO2, and Co-supported PILCs were prepared by the impregnation method. For comparison, Co/SiO2 and Co-supported montmorillonite treated with dilute HNO3 (acid-clay) were also prepared. The materials were characterized by XRD, H2-TPR, NH3-TPD, O2 titration, and N2 adsorption−desorption. The Co-supported catalysts were comparatively investigated for Fischer−Tropsch (FT) synthesis in a fixed-bed reactor under the conditions of 1 MPa, 508 K, H2/CO = 2, and W/F = 5.02 g·h·mol−1. The results indicate that the activities of the catalysts (i.e., CO conversions) increase in the order of Co/Na-Clay Co/Si-PILC ≈ Co/acid-clay ≈ Co/Al-PILC < Co/Zr-PILC ≈ Co/SiO2. Moreover, Co/PILCs can effectively narrow the product distribution of FT synthesis showing significantly increased C5−C12 selectivity and much decreased C21+ selectivity. The results are well explained based on the acidic properties of the PILCs together with the textural properties, pore size distributions, and reduction behaviors of the catalysts. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101163w [article] Co / pillared clay bifunctional catalyst for controlling the product distribution of fischer − tropsch synthesis [texte imprimé] / Qing-Qing Hao, Auteur ; Guang-Wei Wang, Auteur ; Zhao-Tie Liu, Auteur . - 2010 . - pp. 9004–9011. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9004–9011 Mots-clés : Pillared  clays  Catalyst Résumé : Pillared interlayer clays (PILCs) were synthesized by pillaring montmorillonite with SiO2, Al2O3, and ZrO2, and Co-supported PILCs were prepared by the impregnation method. For comparison, Co/SiO2 and Co-supported montmorillonite treated with dilute HNO3 (acid-clay) were also prepared. The materials were characterized by XRD, H2-TPR, NH3-TPD, O2 titration, and N2 adsorption−desorption. The Co-supported catalysts were comparatively investigated for Fischer−Tropsch (FT) synthesis in a fixed-bed reactor under the conditions of 1 MPa, 508 K, H2/CO = 2, and W/F = 5.02 g·h·mol−1. The results indicate that the activities of the catalysts (i.e., CO conversions) increase in the order of Co/Na-Clay Co/Si-PILC ≈ Co/acid-clay ≈ Co/Al-PILC < Co/Zr-PILC ≈ Co/SiO2. Moreover, Co/PILCs can effectively narrow the product distribution of FT synthesis showing significantly increased C5−C12 selectivity and much decreased C21+ selectivity. The results are well explained based on the acidic properties of the PILCs together with the textural properties, pore size distributions, and reduction behaviors of the catalysts. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101163w