Preparation of hierarchical SSZ-13 by NH4F etching

被引：17

作者：

Babic, Viktoria ^{[1
]}

Koneti, Siddardha ^{[2
]}

Moldovan, Simona ^{[2
]}

Nesterenko, Nikolai ^{[3
]}

Gilson, Jean-Pierre ^{[1
]}

Valtchev, Valentin ^{[1
]}

机构：

[1] Normandie Univ, Lab Catalyse & Spectrochim, CNRS, ENSICAEN,UNICAEN, F-14000 Caen, France

[2] Rouen Univ, Inst Sci Appl Rouen, Grp Phys Mat GPM, F-76801 Rouen, France

[3] Total Res & Technol Feluy TRTF, Zone Ind Feluy C, B-7181 Seneffe, Belgium

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2021年 / 314卷

关键词：

Zeolite; Hierarchical; Fluoride etching; SSZ-13;

D O I：

10.1016/j.micromeso.2020.110863

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

NH4-SSZ-13 is etched with an aqueous solution of 40 w/% NH4F under different time/temperature conditions to obtain hierarchical derivatives. The etched zeolites are characterized by XRD, SEM, N-2 physisorption, Si-29/Al-27/F-19 MAS NMR, ICP-AES, and their acidity monitored by in situ FTIR spectroscopy using acetonitrile as a probe molecule. The results highlight that the zeolite is very sensitive to high temperature and high liquid-solid ratio treatments leading to substantial crystallinity losses. These two parameters need careful tuning to obtain hierarchical derivatives retaining important characteristics as micropore volume and framework Si/Al ratio. The catalytic activity of the modified SSZ-13 is evaluated in the n-propanol conversion.

引用

页数：12

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