The maritime industry depends on a range of fuel types, from cleaner distillates to heavier residual fuels. With growing environmental concerns, the European Union (EU) has enforced strict emission control regulations. This article provides an overview of the primary fuels used in maritime transport and how they align with these regulations.
Types of Marine Gas Oil & Heavy Fuels
Marine Gas Oil (MGO)
- A refined distillate fuel, similar to diesel used in road transport.
- Commonly used in auxiliary engines and smaller vessels.
- Available in low-sulphur variants to meet emission standards.
Marine Diesel Oil (MDO)
- A blend of distillate and residual fuel components.
- Provides better performance in medium-speed engines.
- Lower viscosity than heavy fuel oil, but still requires pre-heating.
Heavy Fuel Oil (HFO)
- A residual byproduct of crude oil refining.
- Requires heating before use due to its high viscosity.
- Contains high sulphur content, making it subject to strict regulatory limitations.
Very Low Sulphur Fuel Oil (VLSFO)
- Developed to comply with the IMO 2020 sulphur cap (0.50%).
- A blend of processed heavy fuels and distillates, designed to reduce emissions.
- Helps shipowners transition away from high-sulphur HFO.
Ultra-Low Sulphur Diesel (ULSD)
Contains a maximum of 0.0015% sulphur (15 ppm).
Mandatory in Sulphur Emission Control Areas (SECAs) such as the Baltic and North Seas.
Liquefied Natural Gas (LNG) – Alternative Fuel
Gaining popularity for its significant reduction in COâ‚‚, NOx, and SOx emissions.
Requires modifications to engine and storage infrastructure.
Biofuels
Derived from renewable biomass sources, biofuels are entirely sulphur-free.
However, they present challenges, such as a high potential for microbial growth.
Currently, the high cost of biofuels remains a significant barrier to their widespread adoption in the maritime sector. As a result, they are primarily used in blended forms with conventional fuels, helping to reduce overall sulphur emissions while keeping costs manageable.
Impact on EU Emission Control Regulations
Sulphur Emission Control Areas (SECAs)
Enforce a 0.10% sulphur limit in marine fuels within the Baltic Sea, North Sea, and English Channel.
MGO, ULSD, or alternative fuels must be used in these zones.
IMO 2020 Global Sulphur Cap
Sets a global sulphur limit of 0.50% outside SECAs.
VLSFO and compliant fuels have replaced high-sulphur HFO unless scrubbers are installed.
EU Directive 2012/33/EU
Aligns with IMO rules, requiring ships in EU ports to use fuels containing 0.10% sulphur or less.
NOx Emission Standards
Ships operating in the EU must comply with Tier III NOx limits in designated ECAs.
Methods for compliance include Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR).
EU Emissions Trading System (ETS) & COâ‚‚ Reduction
Maritime transport is now included in the EU ETS, which requires the monitoring of COâ‚‚ emissions.
The EU aims for a 55% reduction in greenhouse gas emissions by 2030 and carbon neutrality by 2050.
Alternative Compliance Measures
Scrubbers: Allow continued use of high-sulphur fuels by cleaning exhaust gases.
LNG & Biofuels: Emerging as cleaner alternatives.
Shore Power (Cold Ironing): Reduces port emissions by using onshore electricity.
As environmental regulations become stricter, the maritime industry must transition to cleaner fuel alternatives and advanced emission control technologies. The EU continues to push for reduced sulphur, NOx, and COâ‚‚ emissions, making compliance essential for sustainable shipping.
At Southern Ocean Marine, we provide comprehensive consulting, technical support, and innovative solutions to help your vessels meet the latest emission regulations and achieve peak performance. Contact us today to learn how our expertise in fuel management, emission control, and marine engineering can support your operations and ensure long-term compliance with environmental standards.
