Modelling pH evolution in Boom Clay porewater during in situ heating

H. Pitsch; C. Beaucaire; F. Behar; F. Lorant; I. Deniau; L. Largeau; Pierre De Cannière; M. Van Geet; Lian Wang

Modelling pH evolution in Boom Clay porewater during in situ heating

H. Pitsch, C. Beaucaire, F. Behar, F. Lorant, I. Deniau, L. Largeau, Pierre De Cannière, M. Van Geet, Lian Wang

R&D Disposal

Research output › peer-review

Abstract

During an in situ thermal perturbation on a clayey rock, CO2 production by decomposition of immature, labile kerogen can take place and acidify the porewater. Calculation of pH changes during five years of heating in the CERBERUS project (a demonstration test to study the near-field effects of a high level radioactive waste canister in an argillaceous formation) is carried out, using a coupled production-diffusion model, combined with or without chemical reaction with calcite. Re-equilibration time of the water-rock system is evaluated and perspectives are given for further developments in the frame of research for disposal of heat-emitting waste in a clay formation.

Original language	English
Title of host publication	Water-Rock Interaction. Proceedings of the 12th International Symposium on Water-Rock Interaction, Kunming, China, 31 July - 5 August 2007.
Place of Publication	London, United Kingdom
Pages	1-4
State	Published - Jul 2007
Event	Twelfth International Symposium on Water-Rock Interaction, WRI-12 - International Association of Geochemistry, Kunming Duration: 31 Jul 2007 → 5 Aug 2007

Conference

Conference	Twelfth International Symposium on Water-Rock Interaction, WRI-12
Country/Territory	China
City	Kunming
Period	2007-07-31 → 2007-08-05

Cite this

@inproceedings{0d4c2165fd42420397c5e530fe1ea7ca,

title = "Modelling pH evolution in Boom Clay porewater during in situ heating",

abstract = "During an in situ thermal perturbation on a clayey rock, CO2 production by decomposition of immature, labile kerogen can take place and acidify the porewater. Calculation of pH changes during five years of heating in the CERBERUS project (a demonstration test to study the near-field effects of a high level radioactive waste canister in an argillaceous formation) is carried out, using a coupled production-diffusion model, combined with or without chemical reaction with calcite. Re-equilibration time of the water-rock system is evaluated and perspectives are given for further developments in the frame of research for disposal of heat-emitting waste in a clay formation.",

keywords = "Boom Clay, Cerberus, CO2, decarboxylation, heat, IFP, kerogen, OM, organic matter, pCO2, temperature increase, thermal perturbation, thermal stress",

author = "H. Pitsch and C. Beaucaire and F. Behar and F. Lorant and I. Deniau and L. Largeau and {De Canni{\`e}re}, Pierre and {Van Geet}, M. and Lian Wang",

note = "Score = 1; Twelfth International Symposium on Water-Rock Interaction, WRI-12 ; Conference date: 31-07-2007 Through 05-08-2007",

year = "2007",

month = jul,

language = "English",

isbn = "978-0-415-45136-9",

pages = "1--4",

booktitle = "Water-Rock Interaction. Proceedings of the 12th International Symposium on Water-Rock Interaction, Kunming, China, 31 July - 5 August 2007.",

}

Pitsch, H, Beaucaire, C, Behar, F, Lorant, F, Deniau, I, Largeau, L, De Cannière, P, Van Geet, M & Wang, L 2007, Modelling pH evolution in Boom Clay porewater during in situ heating. in Water-Rock Interaction. Proceedings of the 12th International Symposium on Water-Rock Interaction, Kunming, China, 31 July - 5 August 2007.. London, United Kingdom, pp. 1-4, Twelfth International Symposium on Water-Rock Interaction, WRI-12, Kunming, China, 2007-07-31.

TY - GEN

T1 - Modelling pH evolution in Boom Clay porewater during in situ heating

AU - Pitsch, H.

AU - Beaucaire, C.

AU - Behar, F.

AU - Lorant, F.

AU - Deniau, I.

AU - Largeau, L.

AU - De Cannière, Pierre

AU - Van Geet, M.

A2 - Wang, Lian

N1 - Score = 1

PY - 2007/7

Y1 - 2007/7

N2 - During an in situ thermal perturbation on a clayey rock, CO2 production by decomposition of immature, labile kerogen can take place and acidify the porewater. Calculation of pH changes during five years of heating in the CERBERUS project (a demonstration test to study the near-field effects of a high level radioactive waste canister in an argillaceous formation) is carried out, using a coupled production-diffusion model, combined with or without chemical reaction with calcite. Re-equilibration time of the water-rock system is evaluated and perspectives are given for further developments in the frame of research for disposal of heat-emitting waste in a clay formation.

AB - During an in situ thermal perturbation on a clayey rock, CO2 production by decomposition of immature, labile kerogen can take place and acidify the porewater. Calculation of pH changes during five years of heating in the CERBERUS project (a demonstration test to study the near-field effects of a high level radioactive waste canister in an argillaceous formation) is carried out, using a coupled production-diffusion model, combined with or without chemical reaction with calcite. Re-equilibration time of the water-rock system is evaluated and perspectives are given for further developments in the frame of research for disposal of heat-emitting waste in a clay formation.

KW - Boom Clay

KW - Cerberus

KW - CO2

KW - decarboxylation

KW - heat

KW - IFP

KW - kerogen

KW - OM

KW - organic matter

KW - pCO2

KW - temperature increase

KW - thermal perturbation

KW - thermal stress

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_96946

UR - http://knowledgecentre.sckcen.be/so2/bibref/5756

M3 - In-proceedings paper

SN - 978-0-415-45136-9

SP - 1

EP - 4

BT - Water-Rock Interaction. Proceedings of the 12th International Symposium on Water-Rock Interaction, Kunming, China, 31 July - 5 August 2007.

CY - London, United Kingdom

T2 - Twelfth International Symposium on Water-Rock Interaction, WRI-12

Y2 - 31 July 2007 through 5 August 2007

ER -