One Of World’s First Tests Of High-Speed Diesel Engines With SCR Exhaust System To Be Conducted
One Of World’s First Tests Of High-Speed Diesel Engines With SCR Exhaust System To Be Conducted
The Rolls-Royce brand MTU and Fairplay Towage are to test an MTU diesel genset with SCR exhaust after treatment in a harbour tug in order to verify compliance with IMO Tier III emission requirements that come into force as of 2016. The nitrogen oxide (NOx) emissions will be cut by 90% compared with the IMO Tier I regulation that was introduced in 2000. “This is one of the world’s first tests of…
In Texas, EPA proposing more emissions restrictions
In Texas, EPA proposing more emissions restrictions
Texas Attorney General Ken Paxton celebrated this summer when the U.S. Fifth Circuit Court of Appeals blocked a federally crafted plan aimed at reducing haze in Big Bend National Park and other wilderness areas in the state. But the Environmental Protection Agency is still moving ahead with another rule that might have the same effect — prompting utilities to shutter some of the state’s…
Introduction Power plant boiler houses designed to burn coal or high sulfur oil are required by Federal and State pollution regulations to “scrub” (remove) sulfur dioxide from flue gasses to meet emission limits. SO2 in flue gasses is known to be harmful to the environment, as it is one contributor to the formation of acid rain. pH control is critical for the proper functioning of the scrubber…
Oil tankers carry oil of different grades and quality, having property to produce flammable vapors and gases when loaded for transportation. Even with no cargo on board, there can be harmful flammable gases present in the hold. When the vapor produced by an oil cargo is mixed with certain concentration of air primarily containing oxygen, it can result in explosion which results in damages to the…
How Oxygen analyser works ? The measuring of oxygen content in an atmosphere is important, particularly when entering enclosed spaces. Also inert gas systems use exhaust gases which must be monitored to ensure that their oxygen content is below 5%. One type of instrument used to measure oxygen content utilises the fact that oxygen is attracted by a magnetic field, that is, it is paramagnetic. The…
7 Ways For Ships To Meet MARPOL NOx Tier III Regulation
7 Ways For Ships To Meet MARPOL NOx Tier III Regulation
Air pollution from ships is on the rise and global emission standards are getting stringent every year. MARPOL Annex VI limits the main air pollutants contained in ships exhaust gas, including sulphur oxides (SOx) and nitrous oxides (NOx), and prohibits deliberate emissions of ozone depleting substances. The main changes to MARPOL Annex VI are a progressive reduction globally in emissions of SOx,…
IN A WET SCRUBBER PROCESS AIR IS DRAWN THROUGH A MIST OF WATER MADE BY SPRAY NOZZLES, THEN THROUGH SEPARATORS WHERE WATER DROPLETS WITH DUST AND PARTICLES ARE REMOVED Air scrubbers are commonly used in process-air applications to eliminate potentially harmful dust and pollutants. A liquid, in general water added with active chemicals adapted to the process, is sprayed in to the air flow. Aerosol…
BACKGROUND International Maritime Organization (IMO) is an agency of the United Nations which has been formed to promote maritime safety. It was formally established by an international conference in Geneva in 1948, and became active in 1958 when the IMO Convention entered into force (the original name was the Inter-Governmental Maritime Consultative Organization, or IMCO, but the name was…
How Selective Catalytic Reduction works in a maritime vessel
How Selective Catalytic Reduction works in a maritime vessel
NOx is reduced using a catalyst together with NOxCare 40 Marine, a high purity urea solution. Exhaust gas passes through the catalyst, where the NOx is converted into harmless nitrogen and water Over 98% NOx reduction can be achieved – ie approaching zero emissions of NOx No increase in fuel consumption or CO2 emissions NOxCare SCR Marine is installed between the engine and the funnel (on some…
The Urgent Need to Reduce Nitrogen Oxide (NOx) Emissions from Ships
The Urgent Need to Reduce Nitrogen Oxide (NOx) Emissions from Ships
The continuous rise of Nitrogen Oxide (NOx) in the atmosphere is a matter of great concern. Several factors have been stated as the reason for the increase of this element in the air and toxic emission from ships is one of them. Nitrogen Oxide (NOx) is formed in the atmosphere when fuels such as oil, gas, and coal are burned at a very high temperature. The pollution caused because of NOx is…
There’s a lot to like and a lot to dislike about both EGR and SCR technologies,” says Dr. Stephen Ciatti, principal mechanical engineer for Argonne National Laboratory (www.anl.gov), “but they are proven approaches to emissions reduction, and most manufacturers in the U.S. have already done most of the work to implement one solution or the other to meet 2010 requirements.” According to Ciatti,…
Damen Opts for AEC Maritime Scrubbers Dutch shipbuilder Damen has inked a Sales Agreement with compatriot scrubber producer AEC Maritime, which will enable the two companies to provide a turnkey solution covering all aspects of gas scrubber retrofitting process.
NOx reduction: Chemical or mechanical? Over the last couple of years, capital investment in energy and fuel efficiency has dropped off. But NOx compliance and reduction of particulate matter remains a crucial topic, writes Paul Morgan.
First SCRUBBER READY vessel Oriental Jubilee joins DNV GL fleet
First SCRUBBER READY vessel Oriental Jubilee joins DNV GL fleet
The Unique Shipping Group christened its new DNV GL-classed vessel Oriental Jubilee in Ulsan, Korea recently. It is the first vessel to receive the DNV GL SCRUBBER READY notation. Credit: Unique Shipping Group DNV GL welcomed the Unique Shipping Group’s new vessel Oriental Jubilee into class when it was christened in Ulsan, Korea recently. The 84,000 m3 LPG carrier was built by Hyundai Heavy…
A catalytic converter is an emissions control device that converts toxic gases and pollutants in exhaust gas to less toxic pollutants bycatalyzing a redox reaction (an oxidation and a reduction reaction). Catalytic converters are used with internal combustion enginesfueled by either petrol (gasoline) or diesel—including lean-burn engines as well as kerosene heaters and stoves.
The first widespread introduction of catalytic converters was in the United States automobile market. To comply with the U.S. Environmental Protection Agency's stricter regulation of exhaust emissions, most gasoline-powered vehicles starting with the 1975model year must be equipped with catalytic converters. These "two-way" converters combined oxygen with carbon monoxide(CO) and unburned hydrocarbons (HC) to produce carbon dioxide (CO2) and water (H2O). In 1991, two-way catalytic converters were rendered obsolete by "three-way" converters that also reduce oxides of nitrogen (NOx);[1] however, two-way converters are still used for lean-burn engines.
Although catalytic converters are most commonly applied to exhaust systems in automobiles, they are also used on electrical generators, forklifts, mining equipment, trucks, buses, locomotives and motorcycles. They are also used on some wood stoves to control emissions.[5] This is usually in response to government regulation, either through direct environmental regulation or through health and safety regulations.
