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Archives :: Chementator :: Air-Pollution Control

Displaying 1 - 6 of 6 stories.
May 1, 2013
Gas-phase option for NOx abatement
The first commercial application of a newly developed process for the treatment of oxides of nitrogen (NOx) waste gas has been established at a milling operation in Los Angeles, Calif. Developed by Pacific Rim Design and Development (PRDD; Reno, Nev.; prdd.net), along with DuPont (Wilmington, Del.; www.dupont.com), the process uses gas-phase chlorine dioxide to react with both NO and NO2 to form nitric and...
http://www.che.com/chementator/air_pollution_control/Gas-phase-option-for-NOx-abatement_10451.html
June 1, 2012
Chlorine dioxide single-stage NOx scrubbing technology lowers costs
A new process for removing oxides of nitrogen (NOx) from industrial foul-air and cool combustion exhaust uses ClO2 in a unique way to remove over 99% of both NO and NO2 with a single scrubbing stage. The reaction vessel is considerably smaller than those required by conventional wet-chemistry NOx removal processes, and according to the technology’s developer, Pacific Rim Design and Development (PRDD...
http://www.che.com/chementator/air_pollution_control/Chlorine-dioxide-single-stage-NOx-scrubbing-technology-lowers-costs_9373.html
August 1, 2011
Practice Green Chemical Engineering
Almost by definition, chemical engineering is a “green” discipline today, as it so often involves efforts to optimize chemical processes in order to reduce the amount of energy and raw materials that are used and the amount of waste that is generated. Today everybody “talks green” but in a lot of cases engineers are the most qualified people to provide the tools required to make...
http://www.che.com/chementator/air_pollution_control/Practice-Green-Chemical-Engineering_8298.html
July 1, 2011
An innovative way to recover elemental sulfur from SO2 emissions
Sulfur dioxide emissions from metals smelters and other process plants are typically treated by converting the SO2 to sulfuric acid, but this may not be convenient, because of the shipping cost for plants located far from an acid market. WorleyParsons (Monrovia, Calif.; www.worleyparsons.com) offers a solution to this problem with a process that converts SO2 to elemental sulfur, which is easier and safer...
http://www.che.com/chementator/air_pollution_control/An-innovative-way-to-recover-elemental-sulfur-from-SO2-emissions_8172.html
June 1, 2011
Biodegradation system for VOCs poised for expansion
A system that utilizes existing biological wastewater-treatment facilities for destruction of biodegradable volatile organic compounds (VOCs) and other organic hazardous air pollutants (HAPs) has been demonstrated at three U.S. petroleum-refining and chemical facilities, and the developer has plans to extend the U.S. patent-pending treatment approach to eight additional facilities in coming months. Environ...
http://www.che.com/chementator/air_pollution_control/Biodegradation-system-for-VOCs-poised-for-expansion_8096.html
March 1, 2011
Improved ethylene-oxide scrubber design can meet stringent regulations
Improvements in the design of ethylene oxide (EtO) scrubbers made by The Clean Air Group, Croll Reynolds Co. (Parsippany, N.J.; www.croll.com) have helped users meet increasingly stringent regulations for EtO emissions, as well as meet tower height restrictions. “Our designs have achieved efficiencies of 99.99% or greater for removal of ethylene oxide, compared to 99–99.9% with alternative...
http://www.che.com/chementator/air_pollution_control/Improved-ethylene-oxide-scrubber-design-can-meet-stringent-regulations_6424.html

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