[Can I make the Temperature-Pressure Phase diagram for CO2 using GWB?]

Hello, I am Jeonghwan, Hwang.

I'm trying to make a Temperature-Pressure Phase diagram for CO2.

My question is, can I make the following picture using GWB?

In this figure, there are Temperature on the X-axis and Pressure on the Y-axis.

Unfortunately, I cannot find to change the Pressure to X or Y-axis.

If possible, is there an example I can refer to?

Thank you

Sincerely,

Jeonghwan Hwang

[How can i make the sorption isotherm?]

Hi, My name is Jeonghwan Hwang.

I am studying about sorption isotherm, and i want to make a sorption isotherm using GWB.

However, i cannot find how to make isotherm in any tutorial or workshop material.

Can i make the sorption isotherm?

I attached a sample which was resulted by PHREEQC.

I wonder if I can make a figure like this.

Thank you for kind reading.

 

Sincerely,

 

Jeonghwan Hwang

[Why does pH in my model rapidly decrease?]

Hello, thank you for your help.

I find that AlO2- mainly affect to decrease pH in my model.

So, I made a model which i want to make by suppress the AlO2-.

 

Next time, i wanted to know whether my react model can be an equilibrium condition .

So, I extended my model time from 30 yr to 500 yr.

And I find that pH of my model converged to 8.3 after almost 100 yr.

 

I have 2 questions in my model.

1) Can i suppress AlO2- in my model? Is there any physical or chemical problem of my model to represent real environment? I don't know well of suppress... 

2) Can I say that my model has an equilibrium condition of pH? 

Thank you

Sincerely

 

Jeonghwan Hwang

REACT0928.rea

[Why does pH in my model rapidly decrease?]

Hi, this is Jeonghwan Hwang,

Thank you for reading.

I want to make a reactive transport modeling of fluid in montmorillonite-Ca.

At first time, i need to make the converged initial condition and use react with 'thermo.com.V8.R6+'.

1) I used the initial water composition with field data. HCO3- ion was selected to balacing ion because balancing with Cl- could not converge the model.

2) I put the reactants 'montmor-Ca'  and put the rate 0.1 volume%/yr

After run,  I saw that the pH of fluid was rapidly decreased at first term of my model.

At first, i think my model should increase the pH, because the reaction of montmorillonite-Ca need H+ ion.

Can anyone please answer to my question?

Thank you.

 

Sincerely

Jeonghwan Hwang

React-question.rea

[The illite/smectite/kaolinite stability diagrams (Garrels 1984)]

Hi, this is Jeonghwan Hwang.

I want to make a phase diagram of illite/smectite/kaolinite stability diagrams that was adapted from Garrels, 1984

I made almost similar figure with it, but i could not make illite and montmorillonite in it... (Galles.ac2)

I used other thermo data, V8R6+ (Galles-1.ac2), but it could not solve, neither. 

Are there any technical method to make it?

Thank you

 

Sincerely, Jeonghwan Hwang.

 

Galles.ac2

Galles-1.ac2

[Equilibrium water composition with Ca-montmorilloniteand initial groundwater]

Hi, thank you for reading.

I wanted to make a phase diagram of Ca-montmorillonite, but I know that I have to define the geochemical condition properly.

So, I am going to make a initial water composition of bentonite.

For this reason, I use 'react' and put the initial groundwater composition of Gyeongju deep groundwater at 'Basis' and Montmor-Ca at 'Reactants'.

I used thermo.com.V8R6+ to define Ca-montmorillonite.

The temperature was defined at '130 cel' which was usually used in high-level radiowaste disposal.

Unchecked 'precipitation' at iteration, because I want to make only groundwater condition.

Finally, I defined 300 yr to make a equilibrium condition.

 

The question is below;

1) why did H+ moles in final results show negative value (-164)? And, can i solve it?

2) the results showed the same pattern with different time scale, 10 yr, 300 yr, 1 yr. why did this results present?

3) are there any method to approach the results more precisely? 

 

Thank you.

 

Sincerely, 

Jeonghwan Hwang

CaB-Raw 0808.rea

React_output.txt

[What is the best method to make a phase diagram of montmorillonite-illite diagenesis?]

Thank you for your kind help.

Now, I roughly made a phase diagram with Ca-Montmorillonite and illite.

I used 'Thermo.com.V8R6+' database.

 

And, I have a new question right now.

Is this phase diagram meaningful? If not, how can i make it more meaningful?

How can i know or tell the meaning of phase diagram?

 

I know that it is very basic question and feel sorry to ask it.

But i cannot find it at GWB guide... 

 

Very very thank you for your kindly help.

 

Sincerely, Jeonghwan Hwanga

[What is the best method to make a phase diagram of montmorillonite-illite diagenesis?]

Hi, Thank you for your kind help.

I can find the thermodynamic datasets which contain the imformation of montmorillonite. (thermo.com.V8.R6)

And i also find the reference script of montmorillonite-illite phase diagram which were made by GWB.

Unfortunately, i cannot make the phase diagram like capture.jpg... But i don't know what is main problem...

Can anybody tell me about my mistake? 

Thank you,

 

Sincerely, Jeonghwan Hwang

[Smectite dissolution with Sulfuric Acid]

Dear, pavanpec30

Hello, this it Jeonghwan Hwang, i'm new to GWB.

I'm interested in Montmorillonite-illite diagenesis and want to make a phase diagram.

Unfortunately, i cannot find any similar mineral as montmorillonite in GWB.

Can you help me to find the montmorillonite? 

Thank you

 

Sincerely, Jeonghwan Hwang

[What is the best method to make a phase diagram of montmorillonite-illite diagenesis?]

Hi, this is Jeonghwan Hwang.

I wan't to make the phase diagram for montmorillonite-illite diagenesis using temperature and pressure.

But i cannot find the montmorillonite in any mineral information.

How to find the montmorillonite? I am very pleased to help me.

 

Sincerely, Jeonghwan Hwang