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PollutionEngineering November 2012 : Page 41

Advertorial TRI-MER CORP . HOWTO: Contact Kevin Moss • (801) 294-5422 • kevin.moss@tri-mer.com Control NO X , SO X , and PM – Industry’s 3 Major Pollutants – with a Single System U ltraCat Catalyst filters systems by Tri-Mer Corporation remove NO X , a cid g ases (including SO 2 and HCl) and particulate (PM), in one efficient system. They are also highly effective for the control of mercury and dioxins. The heart of the system is the latest generation of lightweight ceramic filters. Standard application of the ceramic filters is specified where gas stream temperatures are above 300°F. NO X : UltraCat catalyst filters are com-posed of advanced, low-density fibrous ceramic materials. Filter walls are embed-ded with nanobits of highly-efficient SCR catalyst. Injection of aqueous ammonia is integrated into the system. NO X and ammonia react at the catalyst surface and the NO X is converted into harmless nitro-gen gas and water vapor. Unlike traditional SCR that requires temperatures over 600°F, the UltraCat nano-catalyst SCR allows effective NO X destruction at temperatures as low as 350°F. Destruction efficiencies above 90% are common. SO X : Acid gases are removed in the same system with integrated dry sorbent injec-tion of sodium bicarbonate, trona, or lime. Injected upstream of the filter modules, the powdered sorbent reacts with the acid gas to form a solid particulate that is easily captured on the filter downstream. SO 2 removal is typically over 90%, HCl removal is typically above 95%. PM: The level of particulate at the outlet of the UltraCat is typically less than 2.0 mg/ Nm 3 (about 0.001 grains/dscf) – even with inlet loadings over 10,000 mg/Nm 3 . The loading only affects how often the filters are cleaned with a reverse pulse jet of air. Particulate is captured on the filter face and does not penetrate, allowing complete, repetitive cleaning. This highly engineered filter does not blind like other filters; only after 5 to 10 years in service will the pres-sure drop gradually increase to the point where change-out is needed. Filters are effective on PM10, PM2.5 and submicron particulate. The UltraCat catalyst system is replacing the traditional ESP + Block SCR combina-tion, and similar pollution control trains that might also include a semi-dry spray dryer or sorbent injection for acid gases. The filter systems deliver much better per-formance on PM and NO X , while offering both lower capital cost and lower operating cost. The ceramic filters are a choice far supe-rior to ESPs wherever PM levels include a significant fraction of PM2.5 and submi-cron particulate. They handle much higher inlet loadings (which might include pow-dered sorbent loads that would overwhelm an ESP), are not subject to the selective removal constraints of ESPs, have lower maintenance requirements and fewer cor-rosion issues, and are energy efficient. If sorbents are used for acid gases, the formation of a sorbent cake on the filter surface greatly enhances exposure to the sorbent, resulting in significantly less sorbent consumption for an equivalent removal level compared to ESP. Tri-Mer Corporation is at forefront of air pollution control technology, provid-ing turnkey engineering, manufacturing, installation and service from its Michigan headquarters. www.tri-mer.com NOVEMBER 2012 www.pollutionengineering.com 41

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