Y zeolite depolymerization-recrystallization: Simultaneous formation of hierarchical porosity and Na dislodging

被引：15

作者：

Guzman-Castillo, M. L. ^{[1
]}

Armendariz-Herrera, Hector ^{[1
]}

Perez-Romo, P. ^{[1
]}

Hernandez-Beltran, F. ^{[1
]}

Ibarra, S. ^{[1
]}

Valente, J. S. ^{[1
]}

Fripiat, J. J. ^{[1
]}

机构：

[1] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2011年 / 143卷 / 2-3期

关键词：

Acid Y Faujasite; Depolymerization-recrystallization; In situ sodium exchange; AREA;

D O I：

10.1016/j.micromeso.2011.03.020

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of the depolymerization-recrystallization (DR) process upon Na dislodging on Y zeolites was studied. A Na-Y zeolite was depolymerized with glycerol at 200 and 250 degrees C and partially recrystallized in presence of either a structure directing agent (CTAB) or ammonium ions (NH4NO3/NH4OH). The DR process produced a recrystallized Y zeolite and a non-crystalline mesoporous material acting as a support of zeolite. When recrystallization was carried out with CTAB, the pore size distribution in the support was narrower than in samples where ammonium was used. In both cases, sodium was dislodged away from its exchange sites, yielding a NH4-Y zeolite after recrystallization. Depending on the DR conditions, it is possible to modulate the amount of exchanged sodium of the recrystallized V zeolite as well as the textural properties of the mesoporous alumino-silicate support. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：375 / 382

页数：8

共 27 条

[1] *ASTM, D436595 ASTM
[2] Highly ordered mesoporous MSU-SBEA/zeolite beta composite material
Bagshaw, Stephen A.
Baxter, Neville I.
Brew, Daniel R. M.
Hosie, Camilla F.
Nie, Yuntong
Jaenicke, Stephan
Khuan, Chuah Gaik
[J]. JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (23) : 2235 - 2244
[3] IMBIBITION OF ELECTROLYTES BY POROUS CRYSTALS
BARRER, RM
WALKER, AJ
[J]. TRANSACTIONS OF THE FARADAY SOCIETY, 1964, 60 (4931): : 171 - &
[4] BARRER RM, 1984, INCLUSION COMPOUNDS, V1, P191
[5] Breck DW., 1974, Zeolite Molecular Sieves
[6] The synthesis of a hierarchically porous BEA zeolite via pseudomorphic crystallization
Choi, Minkee
Na, Kyungsu
Ryoo, Ryong
[J]. CHEMICAL COMMUNICATIONS, 2009, (20) : 2845 - 2847
[7] Engelhardt G., 1987, High-resolution solid-state NMR of silicates and zeolites
[8] MOLECULAR-SIEVE ZEOLITE TECHNOLOGY - THE 1ST 25 YEARS
FLANIGEN, EM
[J]. PURE AND APPLIED CHEMISTRY, 1980, 52 (09) : 2191 - 2211
[9] New Strategy to Synthesis of Hierarchical Mesoporous Zeolites
Gu, Fang Na
Wei, Feng
Yang, Jia Yuan
Lin, Na
Lin, Wei Gang
Wang, Ying
Zhu, Jian Hua
[J]. CHEMISTRY OF MATERIALS, 2010, 22 (08) : 2442 - 2450
[10] HUGHES TR, 1967, J PHYS CHEM-US, V71, P7

← 1 2 3 →