Page 28 - European Energy Innovation - Autumn 2014
P. 28
Autumn 2014 European Energy Innovation


certain circumstances, but that
the standards for the quality of
the wash waters is left to member
state. Some of the EU Member
states such as Sweden have
meanwhile forbidden the use of
so-called “open loop” scrubbers
in coastal waters and harbours.
Other countries are carrying out
an environmental impact study,
that can limit the use of scrubbers.
This vagueness in legislation limits
the success of scrubbers.

with a sulphur limit of 0,1% from Scrubbers can be divided in The fact that some scrubber
01.01.2015, ships are obliged dry and wet scrubbers. Wet manufacturers claim a payback
to use distillates such as marine scrubbers use seawater to wash time of up to 2 years if the ship is
diesel oil (MDO) or marine gas out the pollutants from the sailing in an ECA area, will give an
oil (MGO). When we look at the exhaust gasses. That results in incentive for shipowners to install
market price of HFO and MDO the discharge of heavy metals a scrubber if some of the threats
we see that the price of MDO is which are present in the HFO and can be overcome such as the
almost twice the price of HFO. some other pollutants. On top wash water criteria.
Taken into account that fuel cost the pH of the wash water is rather
represents almost 50% of the low 3-4. That means that the Another option could be the use
operational cost of shipping, discharge of the wash water could of natural gas. Due to the high
shipowners are looking to be complicated in harbour areas, volumes of HFO bunkered by
cheaper alternatives. approach channels and close to the big seagoing vessels (5000-
sensitive areas. 10.000tons) only liquid natural
One option could be the use gas (LNG) can be used. Due to
of exhaust gas after treatment Due to the fact that the scrubber the risk linked with the use of
technology, in particularly the technology is in full development gas and the low temperature
use of a scrubber to wash out and that scrubbers are tailor (-162°C), LNG needs already
the pollutants from the exhaust made taking into account the size twice or three times as much
gasses. Due to some uncertainties of the vessel and the power of storage space compared to HFO.
linked with the implementation the engine, there are no series of On the other hand the forecast for
of scrubber technology, the “standard scrubbers” available. LNG is very promising in terms of
success of scrubbers is at this That means that test results on the availability and price. Especially
moment limited. However wash waters can vary in function the developments of shale gas in
with a performance of above of the HFO that is used and the the US had a significant impact on
90% in washing out pollutants, technology that is used by the the price setting for natural gas.
a scrubber can be a valid manufacturer.
alternative especially when in Shale gas has become an
2020 the worldwide sulphur The duality of the system is increasingly important source
cap for seagoing vessels will be that on the one hand IMO has of natural gas in the United
0.5%S. approved the technology under States since the start of this
century, and interest has spread
to potential shale gas reserves
in the rest of the world. In 2000
shale gas provided only 1% of
U.S. natural gas production; by
2010 it was over 20% and the U.S.
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