SiC-Microhotplate Conductometric Sensor Array for NOx, CO, and Hydrocarbon Monitoring of Hot Engine Emissions

EPA Contract Number: 68D02075
Title: SiC-Microhotplate Conductometric Sensor Array for NOx, CO, and Hydrocarbon Monitoring of Hot Engine Emissions
Investigators: Doppalapudi, Dharanipal
Small Business: Boston MicroSystems Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: October 1, 2002 through July 31, 2003
Project Amount: $100,000
RFA: Small Business Innovation Research (SBIR) - Phase I (2002) RFA Text |  Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , SBIR - Monitoring , Small Business Innovation Research (SBIR)


As the number of mobile source emissions in the United States increases, it is necessary to further reduce the emission of CO, NOx, and hydrocarbons from such sources to provide safe air quality, especially in urban environments. Significant reductions in pollution emissions can be achieved using advanced engine controls based on real-time measurements of CO, NOx, and hydrocarbon concentrations in the exhaust stream. Although a strategic need clearly exists for highly sensitive and selective CO, NOx, and hydrocarbons engine emission sensors, no currently available sensors are capable of operating in the high-temperature corrosive engine exhaust environment. Boston MicroSystems, Inc., proposes to develop a CO, NOx, and hydrocarbon engine emissions sensor capable of operating in hot engine exhaust gases for advanced engine emissions controls.

In Phase I, Boston MicroSystems, Inc., will integrate its SiC microhotplate conductometric gas sensor platform with proprietary harsh environment-compatible electrical contacts and conductometric gas-sensitive films to demonstrate operation and stability in high-temperature, corrosive engine exhaust gases. Applications for high temperature-compatible CO, NOx, and hydrocarbon sensors include emissions and energy efficiency control of combustion systems (automotive, aeropropulsion, electrical generation), and industrial process control in the chemical and petrochemical industries.

Supplemental Keywords:

small business, SBIR, EPA, emission measurement technology, CO, NOx, hydrocarbon, mobile sources, gas, sensor, pollution, engine., Scientific Discipline, Air, air toxics, Analytical Chemistry, Environmental Monitoring, mobile sources, Atmospheric Sciences, Engineering, Chemistry, & Physics, Environmental Engineering, particulate matter, particulates, engine exhaust, atmospheric particles, air pollutants, vehicle emissions, motor vehicle emissions, SiC microhotplate conductometric sensor, automotive emissions, emissions measurement, particulate emissions, air sampling, automotive exhaust, emissions, automobiles, emissions analyzer, atmospheric aerosols, exhaust, nitrogen oxides (Nox)

Progress and Final Reports:

  • Final Report