MULTI-POLLUTANT EXHAUST TREATMENT USING SEAWATER FOR MARINE APPLICATIONS

    公开(公告)号:WO2021050496A1

    公开(公告)日:2021-03-18

    申请号:PCT/US2020/049867

    申请日:2020-09-09

    Abstract: Marine engine exhaust includes pollutants such as CO2, NOx and SOx. An on-board system and method for the simultaneous removal of these pollutants includes obtaining seawater from the water on which the marine vessel travels, purifying the seawater to remove a portion of hard ions, concentrating the seawater to yield a concentrated brine solution, treating the concentrated brine solution with a chemical softener to yield a treated brine solution, acidifying the treated brine solution, and utilizing the acidified brine solution in a chlor-alkali process to yield sodium hydroxide. The sodium hydroxide can be used in an acid gas scrubber to remove CO2, NOx, and SOx from the marine engine exhaust gas.

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