Influence of alkali metal cations on the formation of zeolites under hydrothermal conditions with no organic structure directing agents
Antony Nearchou,Asel Sartbaeva +1 more
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In this paper, the interplay between Na and Cs cations in the formation of zeolite RHO is investigated, and it is shown that pure RHO can only be obtained at a very specific Cs to Na ratio.Abstract:
Alkali metal cations play an important role in directing formation of zeolite frameworks in the absence of organic structure directing agents. The interplay between Na and Cs cations in directing formation of zeolite RHO is the main focus of this study. Depending on the ratio of Na and Cs in the precursor gel, with no organic structure directing agents, several different zeolites form during synthesis. This indicates that pure zeolite RHO can only be obtained at a very specific Cs to Na ratio. More generally, this may shed light on the bigger question of how zeolite pores form in the absence of organic structure directing agents.read more
Citations
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Local and Average Structural Changes in Zeolite A upon Ion Exchange
TL;DR: In this paper, the authors show that some structural modifications occur after partially exchanging the extra framework Na + ions with monovalent, Li +, K +, Rb + and NH 4 + and divalent, Ca 2 + cations.
Journal ArticleDOI
Flexible Template-Free RHO Nanosized Zeolite for SelectiveCO 2 Adsorption
Julien Grand,Nicolas Barrier,Maxime Debost,Edwin B. Clatworthy,Fabien Laine,Philippe Boullay,Nikolai Nesterenko,Jean-Pierre Dath,Jean-Pierre Gilson,Svetlana Mintova +9 more
TL;DR: In this paper, flexible small-pore zeolites are used for flue and natural gas processing due to their high selectivity and high CO2/CH4 capacity.
Journal ArticleDOI
Targeted Synthesis of Ultrastable High-Silica RHO Zeolite Through Alkali Metal–Crown Ether Interaction
Quanli Ke,Quanli Ke,Tianjun Sun,Hao Cheng,Chen Haijun,Xiaowei Liu,Xiaowei Liu,Xiaoli Wei,Xiaoli Wei,Shudong Wang +9 more
TL;DR: High-silica RHO zeolite was directly synthesized using an alkali metal-crown ether (AMCE) complex as organic structure-directing agent (OSDA) to demonstrate considerably high reaction activity in NOX removal, making them promising candidates for diesel exhaust treatment.
Journal ArticleDOI
Systematic approaches towards template-free synthesis of EMT-type zeolites
TL;DR: In this article, a method to synthesise pure zeolite EMC-2 using a lower amount of 18crown-6 ether than previously reported was reported. But this method did not show that FAU-type zeolites were not seen to co-crystallise.
Journal ArticleDOI
Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture
TL;DR: In this article, up to 70% of the Cs+ cations could be substituted by much cheaper K+cations and thus the synthesis costs of RHO zeolites could be impressively reduced.
References
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Book
Atlas of Zeolite Framework Types
TL;DR: F framework type data sheets (arranged by 3-letter code in alphabetical order) and isotypic material index.
BookDOI
Collection of Simulated XRD Powder Patterns for Zeolites Fifth (5th) Revised Edition
Michael Treacy,J.B. Higgins +1 more
TL;DR: Powder patterns are simulations of disordered intergrowths as discussed by the authors, and they can be used for identification and identification of patterns, as shown in Table 1 : Powder Pattern Identification Table.
Book
Collection of Simulated Xrd Powder Patterns for Zeolites
TL;DR: Powder patterns are simulations of disordered intergrowths as mentioned in this paper, and they can be used for identification and identification of patterns, as shown in Table 1 : Powder Pattern Identification Table.
Journal ArticleDOI
Investigation of the structure of zeolites by solid-state high-resolution silicon-29 NMR spectroscopy
Book
Zeolite Catalysts: Principles and Applications
TL;DR: In this paper, the authors present an overview of metal-loaded Zeolite Catalysts and their application in CHEMISTRY, MECHANISM, and METAL ZEOLITE CATALYSTs.