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  4. The impact of sorbent geometry on the sulphur adsorption under supercritical water conditions: a numerical study
 
research article

The impact of sorbent geometry on the sulphur adsorption under supercritical water conditions: a numerical study

Maxim, Florentina
•
Niceno, Bojan
•
Testino, Andrea
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2017
Biomass Conversion and Biorefinery

A numerical model to show the impact of the adsorption bed geometry on the desulfurization process of wet biomass under supercritical water (SCW) gasification process has been developed. Three different geometries, straight channels (pipe), sharp-edged channels (sharp) and packed bed of particles (pebbles) have been considered for the sorbent bed. The influence of the flow patterns on the sulphur distribution inside the bed and on the saturation of the sorbent has been analysed. The results show that, when the flow is unidirectional with a parabolic profile, as in the pipe geometry, the adsorption process can be explained based on the 1D plug-flow model. In the case of more complex flow structures, when torus-shaped vortices appeared in the sharp or pebbles geometries, the 3D flow effects should be considered. The present work might provide useful information for the evaluation of sulphur sorption under SCW conditions. The models obtained by computational fluid dynamic, which are under experimental validation using neutron imaging, will help for the sorbent design and production by 3D printing techniques, which represent an advanced engineered tool to improve the process efficiency and sorbent material selection.

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Type
research article
DOI
10.1007/s13399-017-0265-7
Web of Science ID

WOS:000415217300009

Author(s)
Maxim, Florentina
Niceno, Bojan
Testino, Andrea
Ludwig, Christian  
Date Issued

2017

Publisher

Springer Heidelberg

Published in
Biomass Conversion and Biorefinery
Volume

7

Issue

4

Start page

479

End page

485

Subjects

Biomass gasification

•

Supercriticalwater

•

Sulphur poisoning

•

Desulfurization

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GR-LUD  
Available on Infoscience
May 19, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/137466
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