Documents disponibles écrits par cet auteur

Attrition studies of an iron fischer–tropsch catalyst used in a pilot-scale stirred tank slurry reactor / Tie-jun Lin in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13123–13131 Titre : Attrition studies of an iron fischer–tropsch catalyst used in a pilot-scale stirred tank slurry reactor Type de document : texte imprimé Auteurs : Tie-jun Lin, Auteur ; Xuan Meng, Auteur ; Shi Li, Auteur Année de publication : 2012 Article en page(s) : pp. 13123–13131 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalysts Résumé : Attrition resistance is a key design parameter for catalysts used in slurry phase Fischer–Tropsch (F–T) reactors, especially for industrial-scale reaction. It is well-known that iron F–T catalyst particles undergo physical attrition and chemical stresses caused by phase transformations. Here we report on attrition properties of a Fe–Cu–K–SiO2 catalyst used in a pilot-scale stirred tank slurry reactor (STSR) under low temperature F–T reaction conditions. The wax-free catalysts were characterized by SEM, EDS, BET surface area measurements, and a Mastersizer 2000 for particle size analysis. The results show that, after 408 h of reaction in an STSR, the particle size reduction due to erosion/abrasion and fracture was apparent. Large reductions in the Sauter mean diameter (93.45%) and the volume moment diameter (71.67%) were observed. The increase in the fractions of particles smaller than 5 and 10 μm was 18.25 and 30.11%, respectively. We concluded therefore that the catalyst underwent more severe attrition in industrial application and the attrition was mainly caused by the fracture of larger or smaller particles. Further study is needed to improve the catalyst attrition resistance. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014428 [article] Attrition studies of an iron fischer–tropsch catalyst used in a pilot-scale stirred tank slurry reactor [texte imprimé] / Tie-jun Lin, Auteur ; Xuan Meng, Auteur ; Shi Li, Auteur . - 2012 . - pp. 13123–13131. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13123–13131 Mots-clés : Catalysts Résumé : Attrition resistance is a key design parameter for catalysts used in slurry phase Fischer–Tropsch (F–T) reactors, especially for industrial-scale reaction. It is well-known that iron F–T catalyst particles undergo physical attrition and chemical stresses caused by phase transformations. Here we report on attrition properties of a Fe–Cu–K–SiO2 catalyst used in a pilot-scale stirred tank slurry reactor (STSR) under low temperature F–T reaction conditions. The wax-free catalysts were characterized by SEM, EDS, BET surface area measurements, and a Mastersizer 2000 for particle size analysis. The results show that, after 408 h of reaction in an STSR, the particle size reduction due to erosion/abrasion and fracture was apparent. Large reductions in the Sauter mean diameter (93.45%) and the volume moment diameter (71.67%) were observed. The increase in the fractions of particles smaller than 5 and 10 μm was 18.25 and 30.11%, respectively. We concluded therefore that the catalyst underwent more severe attrition in industrial application and the attrition was mainly caused by the fracture of larger or smaller particles. Further study is needed to improve the catalyst attrition resistance. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3014428

Evaluation of laboratory methods for the acquisition of catalyst from fischer–tropsch wax/catalyst mixtures / Tie-jun Lin in Industrial & engineering chemistry research, Vol. 51 N° 44 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14511-14516 Titre : Evaluation of laboratory methods for the acquisition of catalyst from fischer–tropsch wax/catalyst mixtures Type de document : texte imprimé Auteurs : Tie-jun Lin, Auteur ; Meng Xuan, Auteur ; Li Shi, Auteur Année de publication : 2013 Article en page(s) : pp. 14511-14516 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Wax  Catalyst Résumé : Catalyst breakdown by physical attrition and chemical stresses is a problem of great and continuing concern in the slurry phase Fischer―Tropsch Synthesis. To reach a better understanding of the morphology and composition of a working catalyst, it requires first the removal of wax from the catalyst. In this work, Improved Soxhlet Extraction (ISE) in comparison of Standard Soxhlet Extraction was evaluated concerning their separation efficiency and relevancy for characterization of working catalysts. ISE extracted a greater amount of wax and recovered nearly all of the catalyst. In addition, ISE does not change the morphology and particle size distribution of working catalysts whereas Soxhlet extraction fails to reflect the actual information on the catalyst. The ISE is appropriate for the rapid and accurate analysis in plant operation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620365 [article] Evaluation of laboratory methods for the acquisition of catalyst from fischer–tropsch wax/catalyst mixtures [texte imprimé] / Tie-jun Lin, Auteur ; Meng Xuan, Auteur ; Li Shi, Auteur . - 2013 . - pp. 14511-14516. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14511-14516 Mots-clés : Wax  Catalyst Résumé : Catalyst breakdown by physical attrition and chemical stresses is a problem of great and continuing concern in the slurry phase Fischer―Tropsch Synthesis. To reach a better understanding of the morphology and composition of a working catalyst, it requires first the removal of wax from the catalyst. In this work, Improved Soxhlet Extraction (ISE) in comparison of Standard Soxhlet Extraction was evaluated concerning their separation efficiency and relevancy for characterization of working catalysts. ISE extracted a greater amount of wax and recovered nearly all of the catalyst. In addition, ISE does not change the morphology and particle size distribution of working catalysts whereas Soxhlet extraction fails to reflect the actual information on the catalyst. The ISE is appropriate for the rapid and accurate analysis in plant operation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620365