Boiler modifications cut mercury emissions

October 4, 2005

Lehigh University researchers in Bethlehem, Pa., have developed a cost-effective technique for reducing mercury emissions from coal-fired power plants.

Lead investigator Carlos Romero said the Lehigh system in full-scale tests at three power plants reduced flue-gas emissions of mercury by as much as 70 percent or more, with modest impact on plant performance and fuel cost.

The reductions were reportedly achieved by modifying the physical conditions of power-plant boilers, including flue gas temperature, the size of the coal particles that are burned, the size and unburned carbon level of the fly ash, and the fly ash residence time. The modifications promote the in-flight capture of mercury, Romero said.

The researchers report their findings in an article titled "Modification of boiler operating conditions for mercury emissions reductions in coal-fired utility boilers," which will be published in a forthcoming issue of the journal Fuel.

Copyright 2005 by United Press International

Explore further: New EPA air quality rules outweigh costs and provide major health and environmental benefits

Related Stories

EPA sets pollution controls for boilers, incinerators

February 25, 2011

The Environmental Protection Agency on Wednesday said new pollution controls for boilers and incinerators will save thousands of lives every year but at half the cost of an earlier proposal that industry and lawmakers had ...

US issues cheaper boiler rules

February 23, 2011

The US administration overhauled rules Wednesday to cut air pollution from industrial boilers and incinerators but at almost half the price of initial plans criticized by industrial groups.

EPA requires cleanup of mercury from cement plants

August 10, 2010

The Environmental Protection Agency on Monday announced the nation's first limits on mercury emissions from cement plants. The decision also will require reductions of other harmful pollutants from cement plants, including ...

Recommended for you

A cataclysmic event of a certain age

July 27, 2015

At the end of the Pleistocene period, approximately 12,800 years ago—give or take a few centuries—a cosmic impact triggered an abrupt cooling episode that earth scientists refer to as the Younger Dryas.

New blow for 'supersymmetry' physics theory

July 27, 2015

In a new blow for the futuristic "supersymmetry" theory of the universe's basic anatomy, experts reported fresh evidence Monday of subatomic activity consistent with the mainstream Standard Model of particle physics.

Dense star clusters shown to be binary black hole factories

July 29, 2015

The coalescence of two black holes—a very violent and exotic event—is one of the most sought-after observations of modern astronomy. But, as these mergers emit no light of any kind, finding such elusive events has been ...

Image: Hubble sees a dying star's final moments

July 31, 2015

A dying star's final moments are captured in this image from the NASA/ESA Hubble Space Telescope. The death throes of this star may only last mere moments on a cosmological timescale, but this star's demise is still quite ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.