SO3/H2SO4 continuous real-time sensor demonstration at a power plant

Kriesel, Jason

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DOE OSTI · 1855982

SO3/H2SO4 continuous real-time sensor demonstration at a power plant

Kriesel, Jason

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Abstract

We present results from field testing of a new, innovative sensor developed to measure SO3/H2SO4 continuously and in real time at a coal-fired power plant. The system utilizes the sensitivity, specificity, and real-time capabilities of mid-infrared (Mid-IR) laser-based sensor technology, along with a heated, close-coupled cell mounted directly to a power plant duct. Measurements were made by the laser sensor over a 2-day period and compared to results from the accepted method, EPA 8A, which requires a 30-minute collection, labor intensive processing, and off-site analysis at a lab. In contrast to the condensation method, the laser sensor continuously samples flue gas and reports measurements of the concentration of SO3/H2SO4, SO2 ever second with unattended operation. This initial demonstration proved the sensor concept and paves the way for its use for optimizing sorbent injection used to neutralize SO3/H2SO4. Optimized sorbent injection will enable significant cost savings associated with efforts to mitigate the presence and effects of SO3/H2SO4 such as “Blue Plume”, air heater fouling, and duct corrosion. In particular, the real-time, actionable information will enable better control of additive injection in flex conditions and variable fuels.

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20 FOSSIL-FUELED POWER PLANTS Sulfur trioxide, sulfuric acid, coal, laser spectroscopy, real-time sensor, sorbent injection

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Kriesel, Jason. 2021-09-24. SO3/H2SO4 continuous real-time sensor demonstration at a power plant. https://www.osti.gov/biblio/1855982

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