Current Volume 8
Abstract
The International Maritime Organization has for some time now been energetically pursuing the limitation and reduction of greenhouse gas (GHG) emissions from international shipping, in recognition of the magnitude of the climate change challenge and innovative greenship technology. This challenge however is generally on shipping nations, flag states and port states that have to adopt mitigation measures and ensure compliance to same. The aim of this study is to obtain an inventory of ships’ main engine exhaust emissions of GHGs and other relevant substances from domestic and international shipping in the Onne-Bonny navigational channel. Emissions were estimated using the bottom- up activity based model which involves a two-stage process of calculating average fuel consumption of vessels in a given category and consequently applying an emission factor of each pollutant considered in order to arrive at actual emission values. A five year period (2008-2012) data extracted from Onne port’s annual statistics were used for the survey as well as other sources of data including vessel boarding activity and review of engine manufacturers’ catalogue. Model results show that for all categories of vessels studied and for all pollutants considered in the year 2008, container vessels ranked the highest in terms of pollutants produced per tonne of fuel consumed with values of 1142450, 109.5, 29.2, 32850, 19710, 2445.5 and 2701 all in KG for CO2, CH4, N2O, Nox, Sox,At our research level we conclude that if fuel consumption can be reduced significantly, then emissions of substances can also be reduced irrespective of the main engine power, duration of operation of the vessel and the load factor. The study recommends amongst others that there is need to establish and strengthen national climate related initiatives and research in all sectors geared towards collection, storage, and easy retrieval of climatic data. This will further encourage effective and widespread utilization of such data particularly in national planning, policy-making, and institutionalization of early warning system
Citations
IRE Journals:
Onyema Henry , Omoke Victor
"An Assessment of Coastal Ship Emission and Green Ship Technology in Nigeria" Iconic Research And Engineering Journals Volume 8 Issue 11 2025 Page 376-385
IEEE:
Onyema Henry , Omoke Victor
"An Assessment of Coastal Ship Emission and Green Ship Technology in Nigeria" Iconic Research And Engineering Journals, 8(11)
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