From a regulatory point of view, the trading occurs where the traders are.
As for Europe, there is:
ICE - Brent, NBP, Zeebrugge, Power & Emissions....
EEX - Power and Emissions (mostly German)
ENDEX - Dutch & Belgian Power & Gas
Euronext - no energy contracts but they do quote spark & dark spreads...
There is also the Nordpool for Nordic power. For coal, there is globalCOAL. Nymex also offers their crude contracts in London.
For tanker freight FFA's there is Imarex.
However, most markets trade OTC via the brokers.... TFS, Spectron, GFI, ICAP etc...
So yes, you could say there are energy contracts listed in Europe.
