SCR Support Services


As the power generation landscape continues to evolve and new emissions control challenges develop, many coal-fired utilities have begun to search for new strategies in order to optimize SCR performance and catalyst management. This renewed focus is driven by an increase in the number of generating units that must operate at low load (thereby causing problems with ammonium bisulfate plugging the catalyst), a need to reduce operating costs to remain competitive in a changing energy market, an increased awareness of the importance of maintaining a healthy SCR in order to effectively oxidize mercury and comply with MATS, as well as a variety of other factors. Ohio Lumex and W.S. Hinton & Associates have partnered to develop a joint measurement and consulting service, which combines sorbent trap sampling expertise and many years of SCR management consulting experience to perform a direct and comprehensive assessment and characterization of the SCR, and to provide straightforward solutions to these problems.

The initial benchmarking is incorporated into the latest modeling techniques to provide the tools necessary to effectively and holistically operate and manage the SCR. Additional benefits include the ability to predict the impacts of fuel and operational factors on deNOx and mercury oxidation as well as the effects of ammonia slip, HBr, and SO3 on downstream equipment.


  1. Independent providers of technical expertise, testing, modeling, and consulting
  2. Joint effort between industry leaders in respective fields
  3. Fast, complete, direct assessment of SCR performance
  4. Use of state of the art non-extractive measurement techniques

Direct In-Situ Measurements (inlet, outlet, interlayer)

Use state of the art instrumentation and proprietary techniques to measure:

  • NH3
  • ​​​Mercury Oxidation
  • SO3
  • NO3
  • As
  • Se
  • Hydrogen Halides (HCl, HBr, etc.)

SCR Management

  • Latest modeling techniques
  • OEM, advanced, and regenerated catalysts
  • Predictions of fuel and operational impacts of deNOx and Mercury Oxidation
  • Effects of ammonia slip and SO3 on downstream equipment

The process starts with the collection of available plant data and discussion to identify unique concerns and goals. This is followed by an initial direct field assessment (benchmark) that is then incorporated into the long-term SCR management program. Additional periodic field performance testing is recommended to fine tune the program and provide ongoing insight into the actual performance of the SCR. This holistic approach is completely independent of other equipment or service providers, ensuring that the utility receives the most cost-effective and technically optimal options available.

  1. Benchmarking
  2. DeNOx Performance
  3. SO2 Conversion Performance
  4. Mercury Oxidation Performance
  5. Catalyst Management
  6. SCR Management
  7. Long-Term Performance Confirmations

Please see our brochure (below) for additional details regarding our full holistic approach to SCR Support Services.
SCR Support Services