metropolis monte carlo simulation
Recently Published Documents


TOTAL DOCUMENTS

13
(FIVE YEARS 1)

H-INDEX

6
(FIVE YEARS 0)

2021 ◽  
Vol 197 ◽  
pp. 110638
Author(s):  
Yehui Zhang ◽  
Bing Wang ◽  
Yilv Guo ◽  
Qiang Li ◽  
Jinlan Wang




2019 ◽  
Author(s):  
Koki Muraoka ◽  
Yuki Sada ◽  
Atsushi Shimojima ◽  
Watcharop Chaikittisilp ◽  
Tatsuya Okubo

In order to realize designed synthesis, understanding the formation mechanism of zeolites at an atomic level has long been aspired, but remains challenging due to the fact that knowledge of atomic configurations of the species formed during the process is limited. We focus on a synthesis system that crystallizes <b>CHA</b> zeolite from <b>FAU</b> zeolite as the sole source of tetrahedral atoms of Si and Al, so that end-to-end characterization can be conducted. Solid-state <sup>29</sup>Si MAS NMR is followed by high-throughput computational modeling to under-stand how atomic configurations changed during the interzeolite conversion. This reveals that the structural motif commonly found in <b>FAU</b> and <b>CHA</b> is not preserved during the conversion; rather, there is a specific rearrangement of silicates and aluminates within the motif. The atomic configuration of <b>CHA</b> seems to be influenced by that of the starting <b>FAU</b>, considering that <b>CHA</b> synthesized without using <b>FAU</b> results in a random Al distribution. A Metropolis Monte-Carlo simulation combined with a lattice minimization technique reveals that <b>CHA</b> derived from <b>FAU</b> has energetically favorable, biased atomic locations, which could be a result of atomic configurations of the starting <b>FAU</b>. These results suggest that by choosing the proper reactant, Al placement could be designed, to enhance targeted properties of zeolites for catalysis and adsorption.



2019 ◽  
Author(s):  
Koki Muraoka ◽  
Yuki Sada ◽  
Atsushi Shimojima ◽  
Watcharop Chaikittisilp ◽  
Tatsuya Okubo

In order to realize designed synthesis, understanding the formation mechanism of zeolites at an atomic level has long been aspired, but remains challenging due to the fact that knowledge of atomic configurations of the species formed during the process is limited. We focus on a synthesis system that crystallizes <b>CHA</b> zeolite from <b>FAU</b> zeolite as the sole source of tetrahedral atoms of Si and Al, so that end-to-end characterization can be conducted. Solid-state <sup>29</sup>Si MAS NMR is followed by high-throughput computational modeling to under-stand how atomic configurations changed during the interzeolite conversion. This reveals that the structural motif commonly found in <b>FAU</b> and <b>CHA</b> is not preserved during the conversion; rather, there is a specific rearrangement of silicates and aluminates within the motif. The atomic configuration of <b>CHA</b> seems to be influenced by that of the starting <b>FAU</b>, considering that <b>CHA</b> synthesized without using <b>FAU</b> results in a random Al distribution. A Metropolis Monte-Carlo simulation combined with a lattice minimization technique reveals that <b>CHA</b> derived from <b>FAU</b> has energetically favorable, biased atomic locations, which could be a result of atomic configurations of the starting <b>FAU</b>. These results suggest that by choosing the proper reactant, Al placement could be designed, to enhance targeted properties of zeolites for catalysis and adsorption.



2019 ◽  
Vol 27 (2) ◽  
pp. 1262 ◽  
Author(s):  
Yuan Xu ◽  
Yusi Chen ◽  
Zhen Tian ◽  
Xun Jia ◽  
Linghong Zhou


2011 ◽  
Vol 417 (1-3) ◽  
pp. 1082-1085 ◽  
Author(s):  
Evgeny E. Zhurkin ◽  
Dmitry Terentyev ◽  
Marc Hou ◽  
Lorenzo Malerba ◽  
Giovanni Bonny


Polymer ◽  
2005 ◽  
Vol 46 (11) ◽  
pp. 3914-3926 ◽  
Author(s):  
May May Teoh ◽  
Tai-Shung Chung ◽  
David A. Schiraldi ◽  
Si-Xue Cheng




2000 ◽  
Vol 331 (2-4) ◽  
pp. 278-284 ◽  
Author(s):  
Mark A. Miller ◽  
Lynn M. Amon ◽  
William P. Reinhardt


Sign in / Sign up

Export Citation Format

Share Document