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Power Plant Emissions And SCR Monitoring With Multigas™ Analyzers

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Power Plant Emissions And SCR Monitoring With Multigas™ Analyzers

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Tightening regulations on NOx emissions from stationary combustion sources has brought about the development of Selective Catalytic Reduction (SCR) technologies. These technologies are driving NOx emissions to low single digit ppm levels or below. This reduction is not without some drawbacks to emissions in that ammonia is commonly used by the SCR. Normally, ammonia levels can vary from tens of ppm to tens of ppb, but if not balanced correctly the process results in significant ammonia slip. One current method to monitor ammonia relies on catalytic conversion of NH3 to NO, which is then analyzed using traditional chemiluminescence NOx analyzers.

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