Chemical Forums
Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: dom999 on January 28, 2007, 02:32:16 PM
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Hi, I'm an italian PhD student (sorry for my english). I'm searching for data on Lithium and Lithium Hydride. More precisely the problem under investigation is the combustion in hot ( more than 1200 K) air stream of a solid grain of LiH in a vented container.My opinion is that LiH first liquifies and after, dragged by the turbulent stream decomposes giving Li and H2. Thus Li reacts with air oxygen yielding (into this temperature range) Li2O. Now my problem, to make a CFD simulations, is: how much rapid is the decomposition? Increasing temperature I think that LiH decomposes before to react with oxygen and only Liquid lithium reacts. To asses this "hypothesys" I need also data about the rate of Li2O production increasing T between 1200 K and about 3000 K but I can't find. ....In particular I'm searching for:
1) Data concerning LiH decomposition rate @ 1-10 atm and from 1200 K to 3000 K (that is: characteristic time of the decomposition in this range of pressure and temperature: is it < of 10E-5 seconds? I hope less than...)
2) chemical kinetics (not thermodyn.) data in Arrhenius form concerning liquid and gaseous Lithium combustion with air (or oxygen) in the same range of pressure and temperature 1200K-3000K)
Where I can find these data? I have searched into the NIST databases but...nothing!
Can you help me? Thank you for your help and attention!!!