Platinum Oxidation in Molten Salt Reactor

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In an argon atmosphere, a pure platinum crucible is utilized to heat Calcium Chloride salts to 850°C, with chlorine gas introduced to eliminate CaO impurities. Concerns were raised about the potential oxidation of platinum due to induction heating, but it was concluded that the risk of degradation from induced currents is minimal. The primary focus is now on the formation of PtCl2, which may dissolve in the molten CaCl2, leading to platinum impurities in the final product. The melting point of PtCl2 is around 581°C, and while PtCl4 is not a concern due to its degradation at higher temperatures, estimating the solubility of PtCl2 in molten Calcium Chloride is crucial for assessing potential contamination. The discussion highlights the need for analytical methods to quantify PtCl2 formation and its implications for the molten salt reactor process.
Andronicus1717
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In an argon atmosphere, there is a pure platinum crucible that is used to heat Calcium Chloride salts to 850 deg C. After it is heated, pure chlorine gas is bubbled through the molten salt to remove CaO impurities. The heating method is by induction heating.

My questions/concerns: Since we are using induction heating, is there a risk that the induced current will oxidize the platinum and result in producing platinum chlorides.

Also, is there an analytical method to estimate how much platinum chloride will be produced through natural reactions (no induced currents)?
 
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I've pretty much ruled out any degradation due to the induction currents. If there is a galvanic reaction with the platinum it would be to my benefit since platinum is very high on the cathode side of the galvanic series.

My main concern now is the formation of PtCl2 on the surface of the platinum. It has a melting point of ~581 deg C so my guess is it will dissolve in the molten CaCl2 resulting in Platinum impurities in the final salt. PtCl4 is not an issue since it will degrade at the temperatures in the crucible during flow.

Do you think it would be worth it to create a galvanic cell to try and depose any dissolved platinum back on the crucible?

In any case I'm stuck trying to quantitatively estimate the amount of PtCl2 formed which will determine how far I have to take this. Any thoughts?
 
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According to the "Molten Salt Handbook", Platinum chloride decomposes at temperatures lower than the melting point of Calcium Chloride, however there could still be platinum chloride dissolved in solution. Does anyone know where I can find the solubility of Platinum Chloride in molten Calcium Chloride to give me a worst case?
 

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