Lu,
My impression from the voice-over was the degrader altered the AMK additive rather than stripping it out. Presumably after degrading it simply went through with the fuel and burnt in the usual manner.
If this was the case then a catalytic conversion process would seem to suggest itself, rather than one involving the addition of yet another chemical and a subsequent reaction. Adding another chemical would require a storage tank etc, pumps, valves, and none were mentioned.
Just did a search using Altavista and came up with a reference at the following URL:
http://www.dfrc.nasa.gov/gallery/movie/CID/index.html
[This message has been edited by criticalmass (edited 10 November 2000).]