MD - Simulation of diffusion of methane in zeolites of type LTA

被引:15
作者
Fritzsche, S [1 ]
Gaub, M [1 ]
Haberlandt, R [1 ]
Hofmann, G [1 ]
机构
[1] UNIV LEIPZIG, FAK PHYS & GEOWISSENSCH, INST THEORET PHYS, D-04109 LEIPZIG, GERMANY
关键词
MD; zeolites; diffusion processes;
D O I
10.1007/s0089460020286
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Using molecular dynamical computer simulations (MD) the dynamics of kinetic processes in zeolites will be discussed on a molecular level. Small changes in lattice parameters can cause dramatical changes in the diffusion coefficient. The presence of cations Na+, Ca2+ also strongly influences the diffusion. Changes of the self-diffusivities will be discussed that appear if a vibrating lattice instead of a rigid one is used. Nonequilibrium simulations show the correlation between transport-diffusion and self-diffusion in zeolites.
引用
收藏
页码:286 / 292
页数:7
相关论文
共 18 条
[11]   AN MD SIMULATION ON THE APPLICABILITY OF THE DIFFUSION EQUATION FOR MOLECULES ADSORBED IN A ZEOLITE [J].
FRITZSCHE, S ;
HABERLANDT, R ;
KARGER, J ;
PFEIFER, H ;
HEINZINGER, K .
CHEMICAL PHYSICS LETTERS, 1992, 198 (3-4) :283-287
[12]  
FRITZSCHE S, 1996, UNPUB CHEM PHYS LETT
[13]  
HABERLANDT R, 1995, MOLEKULARDYNAMIK
[14]   SELF-DIFFUSION MEASUREMENTS OF NORMAL-ALKANES IN ZEOLITE NACAA BY PULSED-FIELD GRADIENT NUCLEAR-MAGNETIC-RESONANCE [J].
HEINK, W ;
KARGER, J ;
PFEIFER, H ;
SALVERDA, P ;
DATEMA, KP ;
NOWAK, A .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (03) :515-519
[15]   PFG NMR-STUDY OF THE INFLUENCE OF THE EXCHANGEABLE CATIONS OF THE SELF-DIFFUSION OF HYDROCARBONS IN ZEOLITES [J].
HEINK, W ;
KARGER, J ;
ERNST, S ;
WEITKAMP, J .
ZEOLITES, 1994, 14 (05) :320-325
[16]  
Karger J., 1992, Diffusion in zeolites and other microporous solids
[17]   A MOLECULAR-DYNAMICS STUDY OF METHANE IN ZEOLITE NAY [J].
YASHONATH, S ;
DEMONTIS, P ;
KLEIN, ML .
CHEMICAL PHYSICS LETTERS, 1988, 153 (06) :551-556
[18]  
1991, J CHEM SOC FT, V87, P1797