Carbon Dioxide Capture Via Liquid Nitrogen in Compression Ignition Engine

The current study presents a new process for post combustion carbon dioxide (CO₂) capture in diesel engine. Cryogenic technique is used to achieve CO₂ separation from engine exhaust gas. The proposed process converted the CO2 in the form of dry ice using a cooled liquid absorbent (liquid nitrogen) at low pressure (close to atmospheric) and cryogenic temperature. The liquid nitrogen has a temperature of -196°C provided the cooling power to freeze out the CO₂ in the form of dry ice. Experiments are performed in single cylinder four stroke diesel engine with an eddy current dynamometer and AVL444 Di-Gas analyser. The engine exhaust gas is allowed to pass over liquid nitrogen CO₂ capture system. The result shows that liquid nitrogen is able to convert 90% of CO₂ in the form of dry ice at full load condition.