Imperial College London
Alternate

DrTakeshiKurotori

Faculty of Engineering, Department of Chemical Engineering

Research Associate
 
 
 
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Contact

 

takeshi.kurotori13

 
 
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Location

 

ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kurotori:2019:10.1016/j.ces.2018.11.001,
author = {Kurotori, T and Zahasky, C and Hosseinzadeh, Hejazi SA and Shah, S and Benson, S and Pini, R},
doi = {10.1016/j.ces.2018.11.001},
journal = {Chemical Engineering Science},
pages = {366--383},
title = {Measuring, imaging and modelling solute transport in a microporous limestone},
url = {http://dx.doi.org/10.1016/j.ces.2018.11.001},
volume = {196},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The analysis of dispersive flows in heterogeneous porous media is complicated by the appearance of anomalous transport. Novel laboratory protocols are needed to probe the mixing process by measuring the spatial structure of the concentration field in the medium. Here, we report on a systematic investigation of miscible displacements in a  microporous limestone over the range of Péclet numbers, . Our approach combines pulse-tracer tests with the simultaneous imaging of the flow by Positron Emission Tomography (PET). Validation of the experimental protocol is achieved by means of control experiments on random beadpacks, as well as by comparing observations with both brine- and radio-tracers (labelled with 11C or 18F). The application of residence time distribution functions reveals mass transport limitations in the porous rock in the form of a characteristic flow-rate effect. Two transport models, namely the Advection Dispersion Equation (ADE) and the Multi-Rate Mass Transfer (MRMT) model, are thoroughly evaluated with both the experimental breakthrough curves and the internal concentration profiles. We observe that the dispersion coefficient scales linearly with the Péclet number for both porous systems. The tracer profiles acquired on the rock sample are successfully described upon application of the MRMT model that uses two representative grain sizes and a fraction of intra-granular pore space that is independent of the fluid velocity. The analysis of the PET images evidences the presence of macrodispersive spreading caused by subcore-scale heterogeneities, which contribute significantly to the value of the estimated core-scale dispersivity. This effect can be significantly reduced upon application of the ‘dispersion-echo’ technique, which enables decoupling the effects of spreading and mixing in heterogeneous porous media. These observations are likely to apply to any laboratory-scale rock sample and the approach presented here provides a
AU  - Kurotori,T
AU  - Zahasky,C
AU  - Hosseinzadeh,Hejazi SA
AU  - Shah,S
AU  - Benson,S
AU  - Pini,R
DO  - 10.1016/j.ces.2018.11.001
EP  - 383
PY  - 2019///
SN  - 1873-4405
SP  - 366
TI  - Measuring, imaging and modelling solute transport in a microporous limestone
T2  - Chemical Engineering Science
UR  - http://dx.doi.org/10.1016/j.ces.2018.11.001
UR  - http://hdl.handle.net/10044/1/66195
VL  - 196
ER  -
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