Processes > Dissolution and precipitation

Sedimentent as SiO2

(1/6) > >>

Aksenova:
Hello!
I want to simulate and see what state a system containing 5% Na2CO3 (aqueous solution) and SiO2 will be in.
Please look at my code.
To simulate dissolution, do I need to use the "reactions" function?

--- Code: ---SOLUTION 1
    temp      20
    pe        4
    redox     pe
    units     mg/kgw
    density   1
    C(4)      28300
    Na        21700
    -water    1 # kg
END   
SOLUTION 2
    temp      20
    pe        4
    redox     pe
    units     mg/kgw
    density   1
    Si        600
    -water    1 # kg
END
MIX
1 0.5
2 0.5

SAVE SOLUTION 3
     
REACTION_PRESSURE 1
    7
REACTION_TEMPERATURE 1
100  160  180 200 220


SELECTED_OUTPUT
    -simulation false
    -state false
    -solution false
    -distance false
    -time false
    -step false
    -pH false
    -pe false
    -temperature true           
    -si SiO2               
END


--- End code ---

dlparkhurst:
I can't tell what it is you want to simulate. You can calculate saturation indices with your script. If you want minerals to dissolve or precipitate, you need to add EQUILIBRIUM_PHASES.

Aksenova:
Thank you very much for your answer!
I want to simulate the dissolution of solid amorphous silica using solutions of different compositions.
With this code I checked whether amorphous silica precipitates.
Should I use the SOLID SOLUTIONS block?


SOLID SOLUTIONS requires two components to be selected.

dlparkhurst:
I expect that you should use EQUILIBRIUM_PHASES. However, you may be looking at a kinetic process where silica precipitates, but evolves to more stable phases with time. To model that process, you should use KINETICS.

Aksenova:
Thank you
Is it possible to put a substance in a solid state of aggregation into a SOLUTION?

Navigation

[0] Message Index

[#] Next page