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Need kinetic data for scheelite(CaWO4) and ferberite (FeWO4) dissolution
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Topic: Need kinetic data for scheelite(CaWO4) and ferberite (FeWO4) dissolution (Read 1538 times)
Sidol
Frequent Contributor
Posts: 11
Need kinetic data for scheelite(CaWO4) and ferberite (FeWO4) dissolution
«
on:
June 02, 2020, 09:49:58 AM »
Dear Everyone!
I make an experiment where measuring the dissolution of scheelite (CaWO4) and ferberite (FeWO4) from a scheelite+ferberite+quartz powder mixture by three different leachants (distilled water, 0.1 M acetic acid, 0.1 M NaOH) at 200 °C, 250 °C and 300 °C degrees in a tube reactor.
I would like to make a kinetic model in PHREEQC to check the different processes (dissolution, precipitation, secondary phases etc.) during dissolution of scheelite and ferberite.
Does anyone information about activation energy (Ea) and pre-exponential factor (A0) for scheelite and ferberite?
Or if it they are not available, kinetic rate constants for 200, 250 and 300 °C values are also highly appreciated.
Thank You for Your help.
Krisztian
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PhreeqcUsers Discussion Forum
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Conceptual Models
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Kinetics and rate controlling factors
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Need kinetic data for scheelite(CaWO4) and ferberite (FeWO4) dissolution