Archives :: Environmental, Health & Safety :: Environmental Management :: Air Pollution Control

Displaying 61 - 77 of 77 stories.
June 1, 2007
    Although sealing technologies rarely make the headline, when they do, its usually for a tragic reason, which demonstrates how important this small component really is. For example, on January 28, 1986, the Space Shuttle Challenger disintegrated 73 seconds into its flight, after an O-ring seal in its right solid rocket booster (SRB) failed. The seal failure caused a flame leak from the SRB...
May 1, 2007
If every vehicle in the U.S. ran on fuel made primarily from ethanol instead of gasoline, the number of respiratory-related deaths and hospitalizations would likely increase, according to a study by Mark Jacobson, associate professor of civil and environmental...
May 1, 2007
            Many coal-fired power plants make gypsum and construction materials. But they should also consider manufacturing hydrochloric acid and ethanol. Furthermore, they should consider substituting biomass and waste organics for up to 10% of the coal. The combination of these initiatives would make coal plants much “greener.” Coal is the cost effective way to...
April 1, 2007
A microfabricated device that concentrates pollutants, enabling them to be detected in very low concentrations, has been patented by Somenath Mitra, professor and chair of the Department of...
April 1, 2007
    China's tremendous economic growth and modernization has propelled the nation to a position where its consumption of energy imports outpaces its economy. As the world's third-largest oil importer, after the United States and Japan, China imported a record-high 36.38-million tons of refined oil last year, 15.7% more than in 2005, to fuel an estimated annual economic growth of 10.7%, reports...
March 1, 2007
In a related story (see above), the EU and China are launching a project, initiated by Sintef (Trondheim, Norway;, to cut global emissions of greenhouse gases. In the three-year, €3-million "Coach" project, Europe will receive emissions quota for CO2 in exchange for "green" coal-fired power plants for China. A twin of the EU's Dynamis...
February 1, 2007
    Why do governmental bodies regulate VOC (volatile organic compounds) emissions? Because these compounds react with nitrogen oxides to produce ground-level ozone. VOC emissions have many names: hazardous air pollutants (HAPs), non-condensable gases (NCGs), or just plain “organic vapors.” Examples of such emissions in the chemical process industries (CPI) include gasoline and diesel...
January 1, 2007
    Regenerative thermal oxidizers (RTOs) are commonly used for controlling volatile organic compound (VOC) emissions from a broad spectrum of industries. An RTO is basically a thermal oxidizer that uses ceramic media as the heat exchanger medium, providing high heat recoveries. Over the past few years, much attention has been given to the pros and cons of the different types of ceramic media...
January 1, 2007
    November 17 was the deadline for states to submit their plans for the control of mercury emissions from power plants to the U.S. Environmental Protection Agency (EPA, Washington D.C.;, but mercury-control processes are already being commercialized. The Institute of Clean Air Companies (ICAC, Washington D.C.; reports that its members have booked contracts for mercury-control...
December 1, 2006
American Municipal Power-Ohio (AMP-Ohio; Columbus) plans to use the emissions-control technology of Powerspan Corp. (Portsmouth, N.H.; on the proposed AMO Generating Station Project. The project — a 1,000 MW pulverized-coal power...
December 1, 2006
BASF AG (Ludwigshafen, Germany; has commercialized specialty amino-acid salt formulations that are specially designed for the purification of highly aggressive gas streams at petroleum refineries...
November 1, 2006
  Large reductions in the emission of pollutants have been reported in the operation of a novel type of municipal solid-waste treatment plant. A group from the Hong Kong University of Science and Technology’s Dept. of Chemical Engineering ( has reported test results recently conducted on a municipal-solid-waste (MSW), co-combustion pilot plant — a novel design...
September 1, 2006
Messer Group GmbH (Krefeld, Germany; has commercialized a liquid-nitrogen- (LNâ‚‚) based process for purifying exhaust air that contains high (100–1,000 g/m3) loads of chlorofluorocarbons (CFCs) or solvents. Unlike incineration (which can have problems, such as dioxin formation, with chlorinated compounds) or absorption methods (which require subsequent handling or disposal...
July 1, 2006
    Air pollution is monitored by many different regulatory programs, some of which require that emissions be measured continuously. This task is often accomplished by directly measuring air pollutants with continuous emissions monitoring systems (CEMS). In recent years, innovative technology has enabled a new approach that predicts emissions from process variables. Industry welcomes predictive...
June 1, 2006
    Volatile organic compounds (VOCs), together with particulate matter, sulfur oxides and nitrogen oxides, are major components of air pollution that can lead to serious environmental and health hazards. Physical, chemical and biological treatment methods are available to remove VOCs from the air by either recovery or destruction [1-3]. Biological treatment methods, while less well-established...
May 1, 2006
    Advances in catalytic cracking technologies are improving efficiency, product selectivity and environmental emissions. Optimum performance, reliability and flexibility of fluid catalytic cracking (FCC) units is essential for the continued competitiveness of refineries and their ability to meet market demands for refined products. FCC traditionally converts gas oil and heavier residual oil to...
January 1, 2006
This month, the first field tests will be conducted on a pilot plant, developed by WOW Energy, Inc. (Sugar Land, Tex.;, to remove mercury, oxides of sulfur (SOx) and nitrogen (NOx), particulates, heavy metals and volatile organic compounds (VOCs) from the fluegas (FG) of power plants and other industrial facilities. The 2,500-ft3/min pilot unit, constructed with a $1.6-million...
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