You're right, Lars, nitrogen IS inert (relatively speaking) but it can form compounds that are useful. Nitric acid is the first thing that came to my mind, and that stuff is pretty "lively". Then there's always TNT and nitrocellulose.
The way Shell seems to be using it though is more as a solvent. Since Shell is not some "fly-by-night" company, I'd have to think they're convinced it works, and is not just some marketing gimmick.
- Jack
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