Apparatus for carbon dioxide enrichment

A flue gas treatment apparatus for treating a carbon dioxide rich flue gas, the flue gas treatment apparatus comprising:

• a) a flue gas inlet connectable in fluid communication with a flue gas outlet of a combustion furnace, a treated gas outlet downstream of the flue gas inlet, and a gas flow path therebetween, wherein the gas flow path is defined by a frame;
• b) a particulate removal device in the gas flow path for eliminating at least some particulate matter from the flue gas;
• c) a first heater in the gas flow path downstream of the particulate removal device, the first heater for heating the flue gas to a first treatment temperature;
• d) a first catalytic converter in the gas flow path downstream of the first heater for eliminating at least some carbon monoxide and sulfur dioxide from the flue gas;
• e) a second heater in the gas flow path downstream of the first catalytic converter for heating the flue gas to a second treatment temperature;
• f) a second catalytic converter in the gas flow path downstream of the second heater for eliminating at least some NOx from the flue gas;
• and
• g) at least a first fan and a second fan for forcing the flue gas from the flue gas inlet to the treated gas outlet, wherein the first fan is a centrifugal fan that is upstream of the particulate removal device and comprises an impeller mounted in the frame and a motor driving the impeller, wherein the motor is positioned exterior to the frame and is spaced from the gas flow path, and wherein the motor is connected to the impeller by a shaft extending through the frame, and wherein the second fan is an in-line duct fan that is downstream of the second catalytic converter.