Ozone Production Efficiency (OPE) is a measure of the ozone (O3) production that results from nitrogen oxide (NOx) catalyzed carbon compound oxidation cycles. Originally derived by Lui, OPE calculates the number of ozone molecules that are produced before one molecule of NOx is removed from the system and is defined as: OPE = (PO3)/(LNOx). Utilizing California Air Resources Board pollutant and meteorological data, the OPE was calculated for San Francisco for 2016, 2017 and 2018, in order to assess the effectiveness of potential pollution reduction strategies. The OPE calculations used in this assessment focused upon ozone production from the carbon monoxide (CO) oxidation cycle and included the effects of altitude, relative humidity and temperature. The average OPE caused by carbon monoxide oxidation cycles in San Francisco for the years 2016, 2017, and 2018 were determined to be 1.34, 1.32, and 1.01 respectively. By simulating the effects that CO and NOx reductions would have on the OPE, it was determined that prioritizing reductions in CO would be required to maximize the reduction in the OPE. Coupling a 15% decrease in CO with a 5% decrease in NOx saw a reduction in San Francisco’s 2018 OPE by a factor of 1.12. Ultimately, minimization of OPE and CO/NOx concentrations simultaneously requires that the rate of CO removal exceed the rate of NOx removal.

Utilizing ozone production efficiency (OPE) values to simulate potential pollution reduction strategies

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.