Mass Transport of Volatile Molecules in Porous Materials: Evaporation–Condensation Phenomena Described by NMR Diffusometry

2011 ◽  
Vol 115 (38) ◽  
pp. 18776-18781 ◽  
Author(s):  
Caroline Carrara ◽  
Guilhem Pagès ◽  
Corinne Delaurent ◽  
Stéphane Viel ◽  
Stefano Caldarelli
Keyword(s):  
Mass Transport ◽  
Porous Materials ◽  
Nmr Diffusometry

scholarly journals The Impact of Microstructure Geometry on the Mass Transport in Artificial Pores: A Numerical Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Matthias Galinsky ◽  
Ulf Sénéchal ◽  
Cornelia Breitkopf
Keyword(s):  
Mass Transport ◽  
Porous Materials ◽  
Effective Diffusion ◽  
Direct Simulation Monte Carlo ◽  
Numerical Approach ◽  
Porous System ◽  
Length Scales ◽  
General Evaluation ◽  
Pulse Experiment ◽  
The Impact

The microstructure of porous materials used in heterogeneous catalysis determines the mass transport inside networks, which may vary over many length scales. The theoretical prediction of mass transport phenomena in porous materials, however, is incomplete and is still not completely understood. Therefore, experimental data for every specific porous system is needed. One possible experimental technique for characterizing the mass transport in such pore networks is pulse experiments. The general evaluation of experimental outcomes of these techniques follows the solution of Fick’s second law where an integral and effective diffusion coefficient is recognized. However, a detailed local understanding of diffusion and sorption processes remains a challenge. As there is lack of proved models covering different length scales, existing classical concepts need to be evaluated with respect to their ability to reflect local geometries on the nanometer level. In this study, DSMC (Direct Simulation Monte Carlo) models were used to investigate the impact of pore microstructures on the diffusion behaviour of gases. It can be understood as a virtual pulse experiment within a single pore or a combination of different pore geometries.

Mass transport in porous materials under combined gradients of composition and pressure

AIChE Journal ◽  
1969 ◽  
Vol 15 (4) ◽  
pp. 507-514 ◽  
Author(s):  
Robert D. Gunn ◽  
C. Judson King
Keyword(s):  
Mass Transport ◽  
Porous Materials

Single molecule fluorescence imaging of nanoconfinement in porous materials

2021 ◽  
Author(s):  
Bin Dong ◽  
Nourhan Mansour ◽  
Teng-Xiang Huang ◽  
Wenyu Huang ◽  
Ning Fang
Keyword(s):  
Heterogeneous Catalysis ◽  
Mass Transport ◽  
Porous Materials ◽  
Fluorescence Imaging ◽  
Single Molecule ◽  
Reaction Dynamics ◽  
Single Molecule Fluorescence

This review surveys the application of single molecule fluorescence imaging in understanding the nanoconfinement effect in porous materials, with a focus on the mass transport behaviors and reaction dynamics during the heterogeneous catalysis.

Heat and mass transport in microwave drying of porous materials in a spouted bed

AIChE Journal ◽  
2001 ◽  
Vol 47 (7) ◽  
pp. 1499-1512 ◽  
Author(s):  
H. Feng ◽  
J. Tang ◽  
R. P. Cavalieri ◽  
O. A. Plumb
Keyword(s):  
Mass Transport ◽  
Porous Materials ◽  
Microwave Drying ◽  
Spouted Bed ◽  
Heat And Mass Transport

NMR IMAGING AS A TOOL FOR STUDYING MASS TRANSPORT IN POROUS MATERIALS

2006 ◽  
pp. 353-374
Author(s):  
I.V. KOPTYUG ◽  
A.A. LYSOVA ◽  
A.V. MATVEEV ◽  
L.YU. ILYINA ◽  
R.Z. SAGDEEV ◽  
...  
Keyword(s):  
Mass Transport ◽  
Porous Materials ◽  
Nmr Imaging
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