Search the Community

Hello, We are working on capturing some cations using the montmorillonite mineral and modeling it on react. The fluid has a high concentration of sodium which the mineral is supposed to capture. The surface data has been attached which has been developed to capture sodium ions according to three different sites as was the case in the same FeOH data files. The thermo.tdat file has been attached with the added mineral being used in the system along with the surface data file and x1t file. The issue is we have tried a multitude of combinations of concentration of ions but still encountering convergence issues. The main aim is to have high sodium concentrations in the fluid for the mineral to capture the ions when the fluid flows through the aquifer. Please find all the necessary files attached. Thank You Montmorillonite_capture.sdat thermo (2).tdat Montmorillonite.x1t

Hello all, I am attempting to model alteration mineral formation from an ultramafic composition, but cannot get a solution that converges. I have tried changing the parameters in the Config -> Iteration and Config -> Stepping settings, but it still won't converge. The error I get is: N-R didn't converge after 999 its., maximum residual = 2.46e-15, Xi = 0.0000 Largest residual(s): Resid Resid/Totmol Cbasis --------------------------------------------------------- Fe++ -4.405e-20 2.46e-15 1.074e-12 --------------------------------------------------------- My epsilon value is also 1e-11, so not sure why these lesser residuals count as not converging. This is for a planetary application, so the actual fluid chemistry is not constrained. Can someone please give me some advice on what changes should be made to the Basis fluid chemistry to make the solution converge? Or are there any "standard" Basis fluid chemistry packages that I could use to attempt to achieve solution convergence? The current React model is attached. Thank you in advance for your help and advice, it is much appreciated. All the best, Jesse Chassigny_Freshstart_USE_AllMins.rea