Interferometric Continuous Emission Monitor for Active Control of Organic EmissionsEPA Contract Number: 68D99064
Title: Interferometric Continuous Emission Monitor for Active Control of Organic Emissions
Investigators: Poulos, Arthur T.
Small Business: Optomechanical Enterprises
EPA Contact: Manager, SBIR Program
Project Period: September 1, 1999 through March 1, 2000
Project Amount: $69,853
RFA: Small Business Innovation Research (SBIR) - Phase I (1999) RFA Text | Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , SBIR - Monitoring , Small Business Innovation Research (SBIR)
Description:Active process control offers potential to reduce transient and steady-state emissions from combustors and incinerators (mobile and stationary sources). The goal is to alter combustion parameters (equivalence ratio, feed rate, diluent flow, combustion staging) in rapid response to the appearance of Products of Incomplete Combustion (PICs) and PIC precursors. This effort is hampered, however, by the lack of cost-effective "real-time" monitors capable of resolving key species concentrations from a complex exhaust mixture.
This Phase I project offers to test an approach to active control based on a novel interferometer interfaced to a "trained" combustion control system. This particular interferometer uses a wavefront-division design and a step-scanning mode to achieve reduced sensitivity to vibration and background jitter at a relatively low cost and compact size. The sensitivity and linearity of the monitor to low concentrations of PIC precursors, such as benzene and acetylene, will be investigated. Measured concentrations will be compared with online gas chromatography to verify analytical accuracy over a time average. Finally, the interferometer will be tested on the active control of a single PIC precursor (benzene).
The technology is applicable to emission control of stationary sources such as coal and natural gas-fired power plants, municipal incinerators, and waste incinerators. Research findings also will further the goal of active control over mobile sources. The monitor itself also may be sold as a cost-effective single unit replacement for the array of continuous emission monitors now used in industry for multispecies detection.