Please note that extraction of Carbon Dioxide from boiler house stack gases has been used for many years to supply CO2 for Aspirin manufacture, eg at Monsanto Ruabon, where I designed and installed a large liquid CO2 storage facility in 1958

Carbon Dixoide should then be the feedstock for biodiesel plants, see

http://www.algaefuelmaking.com/ http://www.valcent.net/s/Ecotech.asp?ReportID=182039

and www.youtube.com/watch?v=_ToojK_MJd0

regards

Ferrand