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Seawater Could Be Used to Clean Ship Exhaust

The shipping industry, like the airline industry, is responsible for a large chunk of greenhouse gas emissions, but it has been hard to regulate because standards would have to be approved and cialis cheapest price enforced globally. It hasn't faced much pressure to clean up until the UN and European Union recently began calling for lowered emissions. Luckily, a Singapore firm thinks it has a solution to the problem.

Ecospec has developed a method to get viagra prescription remove carbon dioxide, nitrogen oxides, sulphur oxides and soot from ship exhausts with a widely available resource for ships - seawater. The process, called CSNOX, uses electrolysis and ultra-low frequency waves to raise the buy cialis online cialis alkalinity of sea water to a pH of 10 up from 8.1. Seawater is generic cialis usa pumped into a tank, the alkalinity is raised and then the seawater is sprayed into the exhaust funnel of the ship. The dirty water is then collected, filtered and processed before being returned to the ocean.

The higher alkaline water is actually to the ocean's benefit since the acidity of the world's oceans has been rising as CO2 in the atmosphere rises. The water also contains sulphates, nitrates and carbonates that could benefit sea life.

The main objective of buy levitra professional Ecospec was to create a process that wouldn't involve chemicals or create secondary environmental issues. One existing method of removing SO2 from ship exhaust has actually been proven to create CO2 as a by-product, which just further contributes to real viagra online without prescription global warming instead of helping. The high-alkalinity of the CSNOX system prevented this effect by neutralizing the SO2.

Ecospec says that the levitra sales uk method has already been tested on a tanker and shown to remove 90 percent of SO2, 80 percent of NOx and 75 percent of CO2 from the exhaust. The results earned them the support of the American Bureau of Shipping.

If the process makes it past the testing phase, it would cost about $500,000 to $1 million to fit most ships with the system. A small price to pay for removing the cause of 4 percent of global fossil fuel emissions.

via Reuters

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Comments (11)Add Comment
There's gotta be a catch...
written by Knoxville, TN, USA, March 19, 2009
Interesting idea, but there's a gap in the story big enough to drive a supertanker through: Where does the energy for the best place levitra electrolysis come from? Some kind of battery charged up in port? If so, then the claims of "no net CO2 emissions" need to be justified in a bit more detail, as the power company likely burned coal to generate the electricity. Does the energy come from some kind of add-on to the ship's boilers capturing wasted heat? That would seem to be a net positive, but I'm not a chemical engineer. It seems someone should have asked this question before going all ga-ga over this, although I agree it's a clever idea. (I _do_ know enough chemistry to appreciate that the chemical process described should work nicely - I just wonder how the electrolysis will be "paid for" thermodynamically.)
written by solargroupies, March 19, 2009
Not sure about the chemistry of raising pH with ULF and what the energy demand for doing this on an enormous scale would be. If that part works, the electrolysis part is the levitra prescription medication same process used in descaling underwater archeological artifacts. Very cool concept.
processes take energy!
written by loleeGreen, March 19, 2009
I believe a lot of cruise ships run on diesel generator, and in order to use electrolysis for increasing seawater pH, and subsequently pump and viagra non prescription reprocess the "dirty" seawater would all require energy! And the energy seems like it'll be from the diesel generator! not really that great on a life cycle analysis....
written by bbm, March 20, 2009
I'd be pretty surprised if the acid removed from the sea water to increase the pH isn't returned to the sea. You've got to do something with it. That's a small concern, though.

If the price of significant reductions in pollutants is the use of some diesel generated electricity, that's probably going to be a net win unless the eletrical requirements are really huge.

several problems solved IF...
written by Captain Rob Bryan, March 21, 2009
Ships run large gensets 24/7 and the excess energy for the process is probably incidental.

I wouldn't think the it's great! low price viagra acid is levitra by mail "removed", they are changing the pH with chemical process.

We can do a lot to cialis samples reduce consumption like kitesails, efficiency measures, etc, but ships and boats will still need some form of concentrated fuel. A ship is just not a large enough area to collect energy for it's needs.

Most marine engines can run on biofuels with no problem. When we are able to produce oils and biodiesel sustainably (and we will in the next few years) the marine industry can move to them to solve the problem of the release of CO2 from sequestration (petroleum fuels).

That still doesn't solve the problem of ocean acidification.

my questions- high alkalinity "neutralizes" SO2? What are the by products? What and how much are filtered out?

IF this works it has the potential to be a sustainable and even a regenerative solution. Megan do you have anymore info?

written by bbm, March 22, 2009
I wouldn't think the acid is "removed", they are changing the pH with chemical process.

That's how you increase pH. Either remove acid or add base (both chemical processes). If you are adding a base, it has to come from some process that likely also produces an acid byproduct.

written by Benji, March 25, 2009
They are using electrolysis and low-frequency waves to raise the pH. There are no acids or bases used. The article was talking about acidity and alkalinity in the seawater. I think the seawater is used as the electrolyte, if so, no other chemical is used. What to we choice cialis 25mg do with the dirty water and filters is the most important unanswered detail.
written by Benji, March 25, 2009
I didn't mean the dirty water, as the water is filtered, but I meant the dirty filters.
I hope this great idea passes the best price tramadol tesing
written by Jeff, March 26, 2009
I'm an optimist and have great hope that solutions like this will help solve our global climate crisis. Why be so skeptical when this can have such a positive impact?
written by Fred, July 31, 2009
sea water has a lot of good benefits
written by Costa Marcos, May 28, 2011
There's a trend towards cold ironing ships in port - ie linking the ship up to the land electricity supply, rather than letting them run there diesel generators - and land based electricity supply is now coming under a lot of pressure to control CO2 emissions.

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