An investigation of the physical structure of MCM-41 novel mesoporous materials using a corrugated pore structure model

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• 作者：Salmas ; C.E. ; Stathopoulos ; V.N. ; Pomonis ; P.J. ; Rahiala ; H. ; Rosenholm ; J.B. ; Androutsopoulos ; G.P.
• 关键词：Pore structure ; Nitrogen sorption ; MCM-41 ; CPSM model ; Tortuosity
• 刊名：Applied Catalysis A: General
• 出版年：2001
• 出版时间：August 1, 2001
• 年：2001
• 卷：216
• 期：1-2
• 页码：23-39
• 全文大小：368 K

文摘

The preparation and pore structure characterization of MCM-41 materials with or without Al or Ti addition during synthesis are presented in this work. Such solids are intended for use as catalysts supports possessing advantageous pore structure, total acidity and thermal stability characteristics. BET surface areas up to 1483m²/g were determined and compared with cumulative surface areas obtained by methods like the conventional Roberts’ and the newly reported corrugated pore structure model-nitrogen (CPSM-nitrogen) [Ind. Eng. Chem. Res. I 39 (2000) 3747; Ind. Eng. Chem. Res. II 39 (2000) 3764]. CPSM predictions are in perfect agreement with estimates obtained by the BET monolayer adsorption variant. Pore size distributions (PSDs) were deduced by using both the Roberts’ and the CPSM methods. The superiority of the latter method was confirmed, since apart from the prediction of intrinsic PSDs, enabled the determination of tortuosity factors ranging ca. τ_CPSM