Research on Exhaust Gas Cleaning System (EGCS) used in shipping industry for reducing SO_x emissions

Abstract

Nowadays maritime transportation develops environmental pollution issues. On 1st of January 2020 “International Maritime Organization (IMO)” give a new amendment which limits the sulphur content in the fuel oil used on board ships operating outside designated emissions control area (ECA) to 0.50% m/m – a significant reduction from previous limit of 3.5 %. In ECA the sulphur content in the fuel must be maximum 0.10% m/m. In order to comply with the new regulation maritime industry has to search for new methods of reducing the SOx emissions. This article major points are: environmental pollution due to maritime transportation nowadays; methods for shipping industry to comply with IMO 2020 amendment; the use of an EGCS (Exhaust Gas Cleaning System) in order to reduce the output of SOx; discharge washwater chemistry; titration curve and dilution requirement; use CFD modeling in order to determine the expected flow and mixing profiles for the discharge washwater of an acidic effluent waste stream from ship into the ocean; comparison between the manufacturer system specification and the CFD modeling results; conclusions.

Parametric investigation on the performance-emissions trade-off and knocking occurrence of dual fuel engines using CFD

“…SAGE calculates the reaction rates for each elementary reaction while the CFD solver solves the transport equations. The mechanism of the multi-step chemical reaction [56] is described by Eq (7).…”

“…To comply with the increasingly stringent marine emissions regulations, various solutions like combustion process optimisation [1][2][3][4][5], using after-treatment auxiliaries [6][7][8] and alternative fuels [9,10], have been proposed for reducing the marine engine emissions, including Nitrogen Oxides (NOx), Sulphur Oxides (SOx) and Greenhouse Gas (CHG) emissions. Combustion process optimisation and using after-treatment auxiliaries are effective in reducing emissions but also increase the design cost and engine room arrangement, which make using alternative fuels an attractive option.…”

Combined removal experiment of NOx, SO2 and PM from marine diesel exhaust gas with SCR-DryEGCS system

“…24 Two main technologies exist to adapt to the new sulfur emission regulations: (a) the use of low sulfur oil 25 and (b) the installation of scrubbers (also called exhaust gas cleaning system, EGCS). 26,27 Which method is used requires a specific analysis depending on the vessel and is generally assessed in terms of economics. Abadie et al 28 proposed a method for the economic evaluation of both technologies under conditions of uncertainty.…”