[s_Hogg]

How much of the cost is the energy? Would hooking it up to a wind turbine help?

[wcoenen]

The article says 230 kWh per ton of CO2, so you can just multiply that by a cost per kWh, e.g. 0.07 $/kWh for industry in the US.

230 * 0.07 = 16.1 dollars.

So that suggests that most of the cost is not energy.