Localization of Cu+sites and framework Al positions in high-silica zeolites: Combined experimental and theoretical study

2004 ◽  
Vol 6 (9) ◽  
pp. 2003-2007 ◽  
Author(s):  
Roman Bulánek ◽  
Pavel Čičmanec ◽  
Petr Knotek ◽  
Dana Nachtigallová ◽  
Petr Nachtigall
Keyword(s):  
Theoretical Study ◽  
High Silica ◽  
High Silica Zeolites

scholarly journals Alcohol-assisted synthesis of high-silica zeolites in the absence of organic structure-directing agents

2021 ◽  
Vol 42 (4) ◽  
pp. 563-570
Author(s):  
Huimin Luan ◽  
Chi Lei ◽  
Ye Ma ◽  
Qinming Wu ◽  
Longfeng Zhu ◽  
...  
Keyword(s):  
Organic Structure ◽  
High Silica ◽  
High Silica Zeolites ◽  
Structure Directing Agents

Framework composition and activity of platinum-containing high-silica zeolites in n-hexane isomerization

2009 ◽  
Vol 50 (2) ◽  
pp. 247-254 ◽  
Author(s):  
A. L. Lapidus ◽  
M. N. Mikhailov ◽  
I. V. Mishin ◽  
A. A. Dergachev ◽  
V. Z. Mordkovich
Keyword(s):  
High Silica ◽  
High Silica Zeolites ◽  
Framework Composition

Catalytic properties of high-silica zeolites in hydrotreatment of coal liquefaction products

Fuel ◽  
1997 ◽  
Vol 76 (7) ◽  
pp. 683-685 ◽  
Author(s):  
Andrey A. Krichko ◽  
Anatoly S. Maloletnev ◽  
Olga A. Mazneva ◽  
Sergey G. Gagarin
Keyword(s):  
Catalytic Properties ◽  
Coal Liquefaction ◽  
High Silica ◽  
High Silica Zeolites ◽  
Coal Liquefaction Products

scholarly journals Substrate heating method for coating metal surfaces with high-silica zeolites: ZSM-5 coatings on stainless steel plates

2007 ◽  
Vol 101 (3) ◽  
pp. 374-380 ◽  
Author(s):  
Melkon Tatlier ◽  
Mesut Demir ◽  
Begüm Tokay ◽  
Ayşe Erdem-Şenatalar ◽  
Lioubov Kiwi-Minsker
Keyword(s):  
Stainless Steel ◽  
Metal Surfaces ◽  
Steel Plates ◽  
Heating Method ◽  
Substrate Heating ◽  
High Silica ◽  
High Silica Zeolites

Influence of thermal and hydrothermal activation on the adsorptive, acidic and catalytic properties of high-silica zeolites

1984 ◽  
Vol 24 (3-4) ◽  
pp. 277-280 ◽  
Author(s):  
Yu. V. Shumovskii ◽  
S. N. Khadzhiev ◽  
M. I. Levinbuk ◽  
T. V. Limova
Keyword(s):  
Catalytic Properties ◽  
High Silica ◽  
High Silica Zeolites

scholarly journals Adsorption of Lower Alcohols from Water Solutions on High Silica Zeolites, Mesoporous MCM-41 and AlPO4-5

1997 ◽  
Vol 15 (4) ◽  
pp. 289-299 ◽  
Author(s):  
Ivar M. Dahl ◽  
Elisabeth Myhrvold ◽  
Åse Slagtern ◽  
Michael Stöcker
Keyword(s):  
Zeolite Y ◽  
Micropore Volume ◽  
Water Solutions ◽  
Alkyl Chains ◽  
Β Zeolite ◽  
High Silica ◽  
High Silica Zeolites ◽  
Hydrophobic Adsorbents ◽  
Enhanced Adsorption ◽  
Mcm 41

Two dealuminated β-zeolites, zeolite Y and MCM-22 as well as silicalite, MCM-41 and AlPO4-5 have been studied as hydrophobic adsorbents in water solutions. Dealuminated β-zeolite, MCM-22 and silicalite all adsorb alcohols from water solutions. Enhanced adsorption is obtained for alcohols with longer alkyl chains. Adsorption in the practically most interesting 10–80% range of zeolite filling may adequately be described by Langmuir isotherms. The Langmuir adsorption constants are similar for β-zeolite, MCM-22 and silicalite. This indicates that the adsorption is independent of the pore structure for the alcohols tested in this study. The surface silanol density is however important, such that a low SiOH density is required to give lipophilic properties. In line with this, dealuminated zeolite Y, as prepared here, and MCM-41 give only a poor preference for alcohols from water. For the β-zeolite, the dealumination procedure is important for retaining the micropore volume and adsorption capacity of the zeolite. AlPO4-5 shows no potential as an adsorbent for alcohols from water solutions.

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