IN-SITU FT-IR DIAGNOSTICS FOR MONITORING AND CONTROL OF FOSSIL FUEL COMBUSTION

Conference on Selective Catalytic and Non-Catalytic Reduction for NOx Control

Anthony S. Bonanno ; Marek A. Wójtowicz ; Michael A. Serio ; Chad M. Nelson ; Peter R. Solomon

PID  :  49500

来源: CEUR

【 摘 要 】

The use of FT-IR spectrometry as a Continuous Emission Monitor (CEM) in fossil fuel-fired power plantsoffers several advantages.A single instrument can be used to simultaneously monitor several pollutantspecies, thereby greatly reducing the cost and complexity of the CEM system.Additionally, the flexibilityof FT-IR offers different sampling strategies depending on the type of analysis required.Extractivemeasurements provide a low maintenance approach for simultaneously determining concentrations ofseveral species, including CO, CO_2, NO,and SO_2 with high sensitivity.Alternatively, insitumeasurements can be used to determine concentrations of species that are otherwise difficult to monitor, for example, NH 3and HCl.The capability to measure NH3concentrations is particularly useful for monitoring and, potentially, controlling the urea injection process used for NOx reduction. Although FT-IRis an established multicomponent sensor technology, the use of FT-IR for CEM and process monitoring andcontrol systems in power plants is still in the developmental stages, particularly in the case ofin-situ measurements.In this work, we describe the development and testing of an in-situ FT-IR spectrometersystem for process monitoring and control of selective non-catalytic reduction (SNCR) of NOx using the Nalco Fuel Tech (NFT) NOxOUTTM process.[First Paragraph]