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  • Ammonia Sensor for Closed-Loop SCR Control (.pdf)
    Selective Catalytic Reduction (SCR) is the dominant solution for meeting future NOx reduction regulations for heavy-duty diesel powertrains. SCR systems benefit from closed-loop control if an appropriate exhaust gas sensor were available. An ammonia sensor has recently been developed for use
  • Mixing It Up For SCR (Diesel Progress) (.pdf)
    As the on-highway vehicle industry begins looking ahead to the 2010 exhaust emissions standards, many engine and exhaust system manufacturers are looking at urea-injected selective catalytic reduction (SCR) as a viable option to meet Tier 4 NOx regulations. With the European market readily adopting
  • Wiremesh Substrates for Oxidation, TWC and SCR Converters (.pdf)
    and channels are used as carriers of diesel oxidation catalyst, three way catalyst and selective catalytic reduction (SCR) NOx catalyst. Wiremesh materials are chosen not only to withstand corrosion and erosion environments but also durable at maximum continuous operating temperature and peak thermal spikes
  • Simple Improvements, Significant Results - published in Power Engineering (.pdf)
    Digital control systems and advanced technologies like selective catalytic reduction (SCR) and low-NOx burners are commonly used in the power industry. Yet poor or inconsistent damper actuation remains a limiting factor in boiler control.
  • Supporting Reduced Emissions (Diesel Progress) (.pdf)
    for 2010, it seems likely that selective catalytic reduction (SCR) - already widely used in Europe - will also become part of the emissions after treatment mix in North America. In the variety of DPF filters that have been developed, filter substrate materials such as cordierite, silicon carbide
  • Urea Quality Monitoring
    path for OEMs to. achieve low NOx emissions such as described in EuroV/EuroVI, JP09 and US10 is to use a urea Selective. Catalytic Reduction (SCR) system that will reduce NOx into inert N2 and H2O. This SCR system requires a. 32.5 wt% aqueous urea solution (Adblue© or Diesel Exhaust Fluid - DEF
  • Chromalox Provides Freeze Protection for DEF on EPA Compliant Mobile Heavy Construction Machinery
    The customer required three different versions of silicone laminate heaters to maintain the temperature above 5º C and to prevent freezing of diesel engine fluid (DEF) throughout various parts of an on-board selective catalytic reduction (SCR) system used for scrubbing exhaust of diesel engines
  • A Review of Solid Materials as Alternative Ammonia Sources for Lean NOx Reduction with SCR (.pdf)
    The need for improved emissions control in lean exhaust to meet tightening, world-wide NOx emissions standards has led to the development of selective catalytic reduction of NOx with ammonia as a major technology for emissions control. Current systems are being designed to use a solution of urea

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