1 Introduction
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.184(59) – 2009 Guidelines for Exhaust Gas Cleaning Systems – (adopted on 17 July 2009) - Annex – 2009 Guidelines for Exhaust Gas Cleaning Systems - 1 Introduction

1 Introduction

  1.1 Regulation 14 of Annex VI to MARPOL 73/78 requires ships to use fuel oil with a sulphur content not exceeding that stipulated in regulation 14.1 or 14.4. Regulation 4 allows, with the approval of the Administration, the use of an alternative compliance method at least as effective in terms of emission reductions as that required by the Annex, including the standards set forth in regulation 14. The Administration of a party should take into account any relevant guidelines developed by the Organization pertaining to alternatives provided for in regulation 4.

  1.2 Similar to a NOx emission reduction system, an EGC unit may be approved subject to periodic parameter and emission checks or the system may be equipped with a continuous emission monitoring system. These Guidelines have been developed with the intention of being objective and performance oriented. Furthermore, use of the SO2 (ppm)/CO2 (%) ratio method will simplify the monitoring of SOx emission and facilitate approval of an EGC unit. See Appendix II for the rationale explaining the use of SO2 (ppm)/CO2 (%) as the basis for system monitoring.

  1.3 Compliance should be demonstrated on the basis of the SO2(ppm)/CO2(% v/v) ratio values.

Table 1 Fuel oil sulphur limits recorded in regulations 14.1 and 14.4 and corresponding emissions values

Fuel Oil Sulphur Content (% m/m) Ratio Emission SO2(ppm)/CO2(% v/v)
4.50 195.0
3.50 151.7
1.50 65.0
1.00 43.3
0.50 21.7
0.10 4.3

Note: The use of the Ratio Emissions limits is only applicable when using petroleum based Distillate or Residual Fuel Oils. See Appendix II for application of the ratio method.

  1.4 These Guidelines are recommendatory in nature; however, Administrations are invited to base their implementation on these Guidelines.

Parent topic: Annex – 2009 Guidelines for Exhaust Gas Cleaning Systems
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.