Development of Instrumentation for Continuous On-line Monitoring of Non-Methane Organic Carbon in Air Emissions |
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| Authors: | Somenath Mitra Yong H. Xu Wenjun Chen Gary McAllister |
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| Affiliation: | 1. Department of Chemical Engineering, Chemistry and Environmental Science , New Jersey Institute of Technology , Newark , New Jersey mitra@megahertz.njit.edu;3. Department of Chemical Engineering, Chemistry and Environmental Science , New Jersey Institute of Technology , Newark , New Jersey;4. Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency , Durham , North Carolina , USA |
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| Abstract: | ABSTRACT Non-methane organic carbon (NMOC) is a measure of total organic carbon in an air emission, excluding that from methane. Thus, it measures the total amount of carbon, irrespective of the structure and functional groups in the molecule. The U.S. Environmental Protection Agency (EPA) Method 25 is used for quantification of NMOC in emission sources and in ambient air. This method involves laboratory analysis of collected air samples and cannot be used for real-time measurements. It is prone to interferences from CO2, CH4, and CO, as well as moisture. In this paper, a novel method for continuous, on-line monitoring of NMOC in air emissions and ambient air is presented. Detection limits are at ppb levels, and interference of permanent gases have been eliminated. |
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