The following report presents an overview of the Callide Oxyfuel Project (Stage 1 - Oxyfuel Combustion and CO2 Capture) and describes in detail key technical aspects of the plant, project milestones, and lessons learned.
The Callide A facility located near Biloela in central Queensland comprises of 2 x 330 t/day air separation units, a 30 MWe oxy-fuel boiler and a 75 t/day CO2 capture plant. The plant was commissioned in 2012 and as of March 2013 had achieved nominally 5500 hours of industrial operation in oxy-combustion mode and 2500 hours of industrial of the CO2 capture plant.
The project has been able to demonstrate CO2 capture rates from the Oxyfuel flue gas stream to the CO2 capture plant in excess of 85%, and producing a high quality CO2 product suitable for geological storage. In addition, other benefits observed from the oxy-firing and CO2 capture demonstration have included: (i) increased boiler combustion efficiency; (ii) greater than 50% reduction in stack NOx mass emission rates; and (iii) almost complete removal of all toxic gaseous emissions including SOx, NOx, particulates and trace elements from the flue gas stream in the CO2 capture plant.