Predicting packed-bed breakthrough behavior from PFG NMR diffusion data

Pulsed field gradient (PFG) NMR measurements have been conducted to measure self‐diffusion coefficients of gases within porous media. Analysis of these microscopic data with the use of a previously developed long‐range diffusion model has enabled us to accurately predict breakthrough curves for tran...

Full description

Saved in:
Bibliographic Details
Published in:AIChE journal 2004-03, Vol.50 (3), p.589-595
Main Authors: Rittig, Frank, Farris, Thomas S., Zielinski, John M.
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Chemical engineering
Diffusion
Exact sciences and technology
Gases
Heat and mass transfer. Packings, plates
NMR
Nuclear magnetic resonance
Packed bed reactors
Porous materials
Research methodology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pulsed field gradient (PFG) NMR measurements have been conducted to measure self‐diffusion coefficients of gases within porous media. Analysis of these microscopic data with the use of a previously developed long‐range diffusion model has enabled us to accurately predict breakthrough curves for transport through packed‐bed adsorption columns, and the length of unused bed (LUB). This methodology enables the evaluation of mass‐transfer coefficients without the complications associated with transient sorption experiments, that is, heat effects, and thereby offers a reasonable alternative to conventional breakthrough experimentation for the evaluation of mass‐transfer coefficients, and LUB for large‐scale unit operations. 2004 American Institute of Chemical Engineers AIChE J, 50:589–595, 2004)
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.10053