Imperial College London
Portrait Picture

Professor Geoffrey Maitland CBE FREng

Faculty of Engineering, Department of Chemical Engineering

Professor of Energy Engineering
 
 
 
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Contact

 

+44 (0)20 7594 1830g.maitland Website CV

 
 
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Assistant

 

Mrs Sarah Payne +44 (0)20 7594 5567

 
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Location

 

401ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ansari:2022:10.1021/acs.energyfuels.1c03723,
author = {Ansari, H and Gong, S and Trusler, J and Maitland, G and Pini, R},
doi = {10.1021/acs.energyfuels.1c03723},
journal = {Energy and Fuels},
title = {Hybrid pore-scale adsorption model for CO2 and CH4 storage in shale},
url = {http://dx.doi.org/10.1021/acs.energyfuels.1c03723},
volume = {36},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Making reliable estimates of gas adsorption in shale remains a challenge becausethe variability in their mineralogy and thermal maturity results in a broad distributionof pore-scale properties, including size, morphology and surface chemistry. Here, wedemonstrate the development and application of a hybrid pore-scale model that usessurrogate surfaces to describe supercritical gas adsorption in shale. The model is basedon the lattice Density Functional Theory (DFT) and considers both slits and cylindrical pores to mimic the texture of shale. Inorganic and organic surfaces associatedwith these pores are accounted for by using two distinct adsorbate-adsorbent interaction energies. The model is parameterised upon calibration against experimentaladsorption data acquired on adsorbents featuring either pure clay or pure carbon surfaces. Therefore, in its application to shale, the hybrid lattice DFT model only requiresknowledge of the shale-specific organic and clay content. We verify the reliability ofthe model predictions by comparison against high-pressure CO2 and CH4 adsorptionisotherms measured at 40 C in the pressure range 0.01–30 MPa on four samples fromthree distinct plays, namely the Bowland (UK), Longmaxi (China) and Marcellus shale1(USA). Because it uses only the relevant pore-scale properties, the proposed model canbe applied to the analysis of other shales, minimising the heavy experimental burdenassociated with high pressure experiments. Moreover, the proposed development hasgeneral applicability meaning that the hybrid lattice DFT can be used to the characterisation of any adsorbent featuring morphologically and chemically heterogeneoussurfaces.
AU  - Ansari,H
AU  - Gong,S
AU  - Trusler,J
AU  - Maitland,G
AU  - Pini,R
DO  - 10.1021/acs.energyfuels.1c03723
PY  - 2022///
SN  - 0887-0624
TI  - Hybrid pore-scale adsorption model for CO2 and CH4 storage in shale
T2  - Energy and Fuels
UR  - http://dx.doi.org/10.1021/acs.energyfuels.1c03723
UR  - https://pubs.acs.org/doi/10.1021/acs.energyfuels.1c03723
UR  - http://hdl.handle.net/10044/1/95140
VL  - 36
ER  -
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