Rate and Reaction Probability of the Surface Reaction between Ozone and Dihydromyrcenol Measured in a Bench Scale Reactor and a Room-sized Chamber

Abstract

Low volatility terpenoids emitted from consumer products can react with ozone on surfaces and may significantly alter concentrations of ozone, terpenoids and reaction products in indoor air. We measured the reaction probability and a second-order surface-specific reaction rate for the ozonation of dihydromyrcenol, a representative indoor terpenoid, adsorbed onto polyvinylchloride (PVC), glass, and latex paint coated spheres. the reaction probability ranged from (0.06-8.97)-x-10 -5 and was very sensitive to humidity, substrate and mass adsorbed. the average surface reaction probability is about 10 times greater than that for the gas-phase reaction. the second-order surface-specific rate coefficient ranged from (0.32-7.05)-x-10 -15-cm 4-s -1-molecule -1and was much less sensitive to humidity, substrate, or mass adsorbed. We also measured the ozone deposition velocity due to adsorbed dihydromyrcenol on painted drywall in a room-sized chamber, based on that, we calculated the rate coefficient ((0.42-1.6)-x-10 -15-cm 4-molecule -1-s -1), which was consistent with that derived from bench-scale experiments for the latex paint under similar conditions. We predict that more than 95% of dihydromyrcenol oxidation takes place on indoor surfaces, rather than in building air. © 2011 Elsevier Ltd.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

National Science Foundation, Grant 0238721

Keywords and Phrases

Dihydromyrcenol; Indoor air; Kinetics; Ozone; Surface reactions

International Standard Serial Number (ISSN)

1873-2844; 1352-2310

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Elsevier, All rights reserved.

Publication Date

01 Feb 2012

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