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Reactive Transport of scCO2 within Cement Paste

Dangla, P. / Shen, J. / Thiery, M.

This work proposes a model for the reactive transport of CO₂ throughout cement paste under geological storage conditions. Special attention is paid to the modeling of the dissolution and precipitation of the main solid compounds: portlandite (CH), calcium silicate hydrates (C-S-H), amorpheous silica (SH_t) and calcite (CC-). A thermodynamic description of the dissolution of C-S-H is proposed to account for the continuous variation (decrease) of the C/S ratio during the dissolution reaction of C-S-H. The porosity changes induced by the precipitation and dissolution reactions are also taken into account. We simulate by using a finite volume method some experiments reported in the literature and compare our numerical results to these experimental observations.

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Reactive Transport of scCO2 within Cement Paste

Dangla, P. / Shen, J. / Thiery, M.

This work proposes a model for the reactive transport of CO₂ throughout cement paste under geological storage conditions. Special attention is paid to the modeling of the dissolution and precipitation of the main solid compounds: portlandite (CH), calcium silicate hydrates (C-S-H), amorpheous silica (SH_t) and calcite (CC-). A thermodynamic description of the dissolution of C-S-H is proposed to account for the continuous variation (decrease) of the C/S ratio during the dissolution reaction of C-S-H. The porosity changes induced by the precipitation and dissolution reactions are also taken into account. We simulate by using a finite volume method some experiments reported in the literature and compare our numerical results to these experimental observations.

Reactive Transport of scCO2 within Cement Paste

Dangla, P. / Shen, J. / Thiery, M.

This work proposes a model for the reactive transport of CO₂ throughout cement paste under geological storage conditions. Special attention is paid to the modeling of the dissolution and precipitation of the main solid compounds: portlandite (CH), calcium silicate hydrates (C-S-H), amorpheous silica (SH_t) and calcite (CC-). A thermodynamic description of the dissolution of C-S-H is proposed to account for the continuous variation (decrease) of the C/S ratio during the dissolution reaction of C-S-H. The porosity changes induced by the precipitation and dissolution reactions are also taken into account. We simulate by using a finite volume method some experiments reported in the literature and compare our numerical results to these experimental observations.

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Title:

Reactive Transport of scCO2 within Cement Paste

Contributors:

Dangla, P. (author) / Shen, J. (author) / Thiery, M. (author)

Conference:

Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria

Published in:

Poromechanics V ; 2059-2068

Publication date:

2013-06-18

ISBN:

DOI:

https://doi.org/10.1061/9780784412992.243

Type of media:

Conference paper

Type of material:

Electronic Resource

Language:

English

Keywords:

Wave propagation , Poroelasticity , Cement , Mechanics , Experimentation , Simulation , Porous media , Porosity

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