Lloyd’s Register Fuel Oil Bunkering Analysis and Advisory Service (FOBAS) on Monday (15 August) released a bulletin responding to numerous questions on the approved a Unified Interpretation (UI) in relation to use of biofuels and how to now proceed to use these biofuels:
Many ship operators over the last few years have been looking at the possibility of using one or the other
marine biofuel grades being offered, either as a straight replacement fuel or supplied as a blend component with conventional petroleum derived residual or distillate products; typically, at ratios between 20-50%.
However, a major impediment to this biofuel usage in any form has been the requirement under regulation 22.214.171.124 of MARPOL Annex VI that:
‘… fuel oil for combustion purposes derived by methods other than petroleum refining shall not cause an engine to exceed the applicable NOx emission limit set forth in paragraphs 3, 4, 5.11 and 7.4 of regulation 13….’
This has necessitated applications in each instance for an exemption from the flag State to undertake the necessary biofuel trials onboard which of course have had to cover not just the basic functionality of using those fuels but also the determination of NOx emissions in accordance with the relevant provisions of the NOx Technical Code 2008 – a complex and time-consuming task with which FOBAS has been assisting a number of ship operators with trial supporting services. A summary of findings to date was issued earlier this year.
In June MEPC 78 approved a Unified Interpretation (UI) in relation to the use of biofuels – paragraph 13 in the updated consolidated IMO Circular MEPC.1/Circ,795/Rev.6. However, FOBAS has received numerous questions on both this UI itself and how to now proceed where there is the intention to use these biofuels; either as a replacement fuel or as a blend component. To answer these points FOBAS has advised as follows as regards the meaning of this UI:
In this it is important to note that this is a UI which Administrations are ‘invited to apply’, the actual text of MARPOL Annex VI has not been amended.
Consequently, FOBAS would recommend that ship operators now intending to use biofuels or biofuel blends should obtain confirmation from the relevant flag State that they will be following the guidance provided by this UI and that NOx emission trials would not be required on the basis that the engines in which that fuel is to be used will be retained in a NOx compliant condition.
Equally, ship operators with existing flag States acceptances as the use of restricted biofuel blends, should obtain confirmation that, if so required, higher ratios of biofuels could now be used without the need for further NOx emission trials.
LR FOBAS support
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