Method of reclaiming and utilizing water and carbon dioxide from the exhaust to create near zero greenhouse gas emission exhaust system

摘要

A method of producing calcium carbonate from the exhaust 2 of an internal combustion engine 1 comprises; treating 3 the exhaust gas to remove particulate matter, sulphur dioxide (SO2) and carbon monoxide (CO); passing the exhaust gas through a scrubbing device 6 that will separate the gas into a carbon dioxide (CO2) rich stream and an nitrogen/water vapour rich stream; cooling 11 the nitrogen/water vapour rich stream; passing the nitrogen/water vapour rich stream through a membrane condensing device 14 to separate demineralised water from the stream to leave it nitrogen rich; passing the reclaimed water to a reservoir 16; venting 8 the nitrogen rich gas to the atmosphere; passing the carbon dioxide rich gas stream and at least some of the reclaimed water to a catalysed carbon capture device 41; adding amounts of caustic soda/sodium hydroxide (NaOH) 44 and calcium chloride (CaCl2) 45 to the device; and reacting the carbon dioxide, water, caustic soda and calcium chloride at a temperature below 140 degrees centigrade to produce calcium carbonate (CaCO3) and sodium chloride (NaCl).