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Color change of residue

I have some residue built up at the outlet of my high temp pyrolysis reactor. The residue changes color/state from yellow powder/flakes to green liquid when exposed to atmosphere for a few days at room temp. This residue was analysed and was found to have Ni, C and Br and slight amounts of F and O(basically a organic substance bonded to Ni). How does this transformation happen? Any suggestions/guesses?

Thanks,

ARJUN VENKATARAMAN
- Fremont, California, USA
2003

I would imagine that the material is hygroscopic and draws in water when it has been cool for a few days, which water it obviously can't sustain at high temperatures. But I guess I don't know enough about you subject to hear the question right--you haven't told us what product you are making but are asking what the side products of the reaction would be expected to be?

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
2003

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