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yzdm

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  1. Thanks for your reply. There is something wrong with the internet connection yesterday. The webpage displayed submission failed. I will pay attention not to submit multiple times. Anyway, thanks.
  2. Hi there, here is a question. What is the difference between the units: kg/free kg/log kg/ log free kg? Any special meaning?
  3. Here is a detialed description. I ran a reaction under temperatures from 350 to 200 and at the temperature of 300, 250, 200, respectively. For example, i compared the amount of products at 300 (the reaction conducted from 350-200), however, these amounts are different from the value when i ran the same reaction at the temperature at 300. Why does this happen?
  4. Hi everyone, i made a comparison between the databases from GWB and EQ3/6. There are content differences between these two databases. The database content of EQ3/6 is similar to that of GWB, and the titles in the same line of the table below have similar content from No. 1 to No. 8. And No. 10&11 of EQ3/6 are break up and filled into other contents in GWB. However, the content of 'Solid solutions' in EQ3/6 and 'Oxide' in GWB seem to be the distinctive content in each database. I want to ask whether the database of GWB contains 'solid solution', if not, what effect will have on the simulation result? No. EQ3/6 GWB 1 Title including Options Header (References) 2 Miscellaneous parameters Tables 3 Elements Elements 4 Basis species Basis species (B-dot parameters) 5 Auxiliary basis species Redox couples (B-dot parameters) 6 Aqueous species Aqueous species (B-dot parameters) 7 Solids Minerals 8 Gases Gases 9 Solid solutions Oxides 10 B-dot parameters 11 References
  5. Hi, recently, i would like to run a model of reactions between glass and water. Oxides are used as the reactants on behalf of glass. However, errors occurred when i ran the react like below: -- Error: Can't react B2O3(ox) because the system doesn't include B(OH)3(aq) -- Error: Can't react Li2O because the system doesn't include Li+ -- Error: Can't react MgO because the system doesn't include Mg++ -- Error: Can't react TiO2 because the system doesn't include Ti(OH)4(aq) -- Error: Can't react Cr2O3 because the system doesn't include CrO4-- -- Error: Can't react Cs2O because the system doesn't include Cs+ -- Error: Can't react F2(g) because the system doesn't include F- The react file and database are attached below. Species mentioned above "B(OH)3(aq), Li+, Mg++, Ti(OH)4(aq), CrO4--, Cs+, F-" are all under the 'Basis species' but none under the 'Aqueous species'. I suppose this may be the reason for errors. However, how can i solve this problem? prototype.rea thermo.com.V8.R6+1.tdat
  6. I have found the answer now. There is no need to reply, cheers!
  7. Hi guys, i want to make a comparison between EQ3/6 and GWB about a simple water-rock reaction on the base of the same thermodynamic database. The final results seem to be alike, but the processes of the reaction have much difference. I guess the algorithms used by these two software cause the situation. A hybrid Newton-Raphson algorithm is employed in EQ3/6 during the reaction. However, i don't find the algorithm that GWB used during reaction. So i am here asking for help. ONE MORE, why can i only start a topic on the student forum?
  8. Recently, i want to run two reactions, the second one is on the basis of the first one. After running the first reaction, i use run-pick up-system-entire, but an error occurs. However, this situation doesn't occur all the time, just in a small range of amount of reactant. The reaction files and database are attached below. I don't know what's wrong, so i am here asking for help. Stage1.rea thermo.nn.tdat !What's more, aftering reading the content about redox pivot, i decoupled "HS-/SO4--" and solved this problem. But the sulfide won't form in the reaction. I am not sure what happened inside.
  9. Hi Brian Farrell, Thank you for your reply. It maybe work, however, i need time to learn the methods. And i will ask for your help, if more questions occur to me. Best
  10. Hi, everyone, I need to run a series reaction files under diffrent w/r ratios and temperatures, which is about 126 reacions in total. This is only the first step.Moreover, i also need to run new reactions on the basis of the results of the first step. As we can see, i may collect the concentrations or values of the products, the pH, the logfO2 and some elements in the fluid about the 252 reactions. I did it once, which took me about four days. It is too time consuming, so i want to ask for help! Is there any convenient way for users like me to get what i want. Thank you guys.
  11. Hi, Brian Farrell, Thank you every much for you kindness help. It works well now. The warning messages only occur under temperatures below about 140℃ due to the mass imbalance of -e. The database file was too large to upload, so i just uploaded the rea file. Regards, Chen
  12. Hi, there, I was runing a series of reaction files and i need pick up the results and draw some special charts. However, when i click the 'view results' button, the results are incomplete like below. So, anyone can tell me where to change the setting in order to show the full results, please? Ksberg-stag1-0.2.rea
  13. Hi Melika Sharifi, We can get log(SO4--/H2S) = logK + 2logO2,aq, according to H2S + 2 O2 - = SO42- + 2 H+. I suppose ' O2 - ' in the reaction means 'O2,aq' actually? Bests, ChenYang
  14. Hi there, I have a question when i read a pic like this: What is that mean by saying:"O2 activity is expressed as SO42-/H2S". Any more information can be delivered?
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