Advanced Monitoring System for Effective NOx Control

EPA Contract Number: 68D00211
Title: Advanced Monitoring System for Effective NOx Control
Investigators: Johnson, Stephen
Small Business: ADA Environmental Solutions L.L.C.
EPA Contact: Richards, April
Phase: I
Project Period: September 1, 2000 through March 1, 2001
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (2000) RFA Text |  Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , SBIR - Monitoring , Small Business Innovation Research (SBIR)


Selective catalytic reduction (SCR) systems rely on an accurate measure of the NOx molar flux to control the amount and distribution of ammonia reagent entering the reactor. The NOx flux usually is derived from a single-point NOx concentration measurement or look-up table value, and a calculated flue gas flow rate. The reagent flow then is trimmed based on a feedback signal from the NOx CEM to maintain the desired NOx emission. This control scheme results in unnecessarily high operating costs when inlet NOx deviates from expected values. ADA Environmental Solutions has devised a feasible means of adapting SCR sootblowers into movable sampling probes during the time that they are not needed for cleaning the catalyst. Feasibility tests will be performed at a utility boiler site in this Phase I project. The advantages of the SootSniffer technology (patent-pending) are quantified in terms of improved reagent usage, less downtime for air heater washes, improved flyash sales, and online tracking of catalyst reactivity.

Supplemental Keywords:

small business, SBIR, monitoring, air emissions, engineering, chemistry, EPA., RFA, Scientific Discipline, Air, Ecosystem Protection/Environmental Exposure & Risk, Chemical Engineering, air toxics, Environmental Chemistry, Chemistry, Monitoring/Modeling, Environmental Monitoring, tropospheric ozone, Engineering, Environmental Engineering, ambient air quality, Nitrogen Oxides, Nox, emission control strategies, monitoring, NOx molar flux, stratospheric ozone, air pollutants, NOx control, ambient air, ambient monitoring, air sampling, air quality data, emissions control, atmospheric monitoring

Progress and Final Reports:

  • Final Report