%0 Conference Paper
%A Poonoosamy, Jenna
%A Mahrous, Mohamed
%A Curti, Enzo
%A Churakov, Sergey
%A Klinkenberg, Martina
%A Bosbach, Dirk
%A Prasianakis, Nikolaos
%T A Microfluidic Experiment and Pore Scale Modelling for Assessing Mineral Precipitation and Dissolution in Confined Spaces
%M FZJ-2019-04401
%D 2019
%X The precipitation and dissolution of minerals in porous media are  important  processes  in  geological  and technical settings. Such reactions can alter the porosity, permeability, and other physical  characteristics  of  the  rock  matrix that  can  affect solute transport. In order to bridge atomistic and macroscopic scales,  it  is  necessary  to  understand  the  processes  and subsequently to upscale the pore-scale results to macroscopic simulation   codes.   In this   direction,   we   developed a methodology    combining    a    sophisticated    microfluidic experimental  setup  and  cross-scale  modelling  numerical diagnostics.  This  allows  exploring  the  processes  of  mass transport  coupled  to  nucleation,  mineral  precipitation  and dissolution  in  confined  spaces. A system  with  relatively  few chemical  species,  but  with  well-defined  kinetic  parameters was chosen to establish a "proof of concept". The pore scale modelling of the processes inside the microfluidic reactor was based  on  the  Lattice  Boltzmann  method  and  was  used  to spatially  resolve  the  solution  composition  not  accessible experimentally,to calculate the local saturation indices using full  speciation,  and to  predict  the  induction  time for  the nucleation  process.  The  information gained  from  the  cross-scale  pore-level  model  helped  to  gain  insights  into  the underlying precipitation mechanisms and  to  explain  the preferential  growth  direction  of  the  crystals  during  the experiment.
%B Goldschmidt 2019
%C 18 Aug 2019 - 23 Aug 2019, Barcelona (Spain)
Y2 18 Aug 2019 - 23 Aug 2019
M2 Barcelona, Spain
%F PUB:(DE-HGF)24
%9 Poster
%U https://juser.fz-juelich.de/record/864730