NDLI: Smog chamber studies of ozone formation potentials for isopentane

Content Provider	Springer Nature Link
Author	Jia, Long Xu, YongFu Ge, MaoFa Du, Lin Zhuang, GuoShun
Copyright Year	2009
Abstract	The incremental reactivity and ozone formation potential of isopentane have been studied with chamber experiments and computer simulations. The chemical mechanism used in the computer simulations is an isopentane sub-mechanism from the Master Chemical Mechanism (MCM). The results from the chamber experiments suggest that the MCM can well simulate i-C$_{5}$H$_{12}$-NO$_{x}$ chamber experiments. The heterogeneous reaction of NO$_{2}$ and water is an important source for OH radicals in the chamber experiments. The photolysis of HONO is responsible for the initiation of isopentane in photochemical reactions. The reaction rate constant for NO$_{2}$ → HONO was determined to be 3.9×10$^{−4}$−5.9×10$^{−3}$ min$^{−1}$ by conducting 3 sets of CO-NO$_{x}$-air irradiations. 5 sets of isopentane-NO$_{x}$ irradiations under different conditions were performed in our chamber. Compared with the experiment with a low relative humidity (RH), an increase in RH can increase the reaction rate of NO$_{2}$ with H$_{2}$O, so that the peak ozone occurs earlier. When isopentane is predominant over NO$_{x}$, the peak ozone concentration is largely dependent on NO$_{x}$ concentrations.
Starting Page	4624
Ending Page	4632
Page Count	9
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	54
Issue Number	24
e-ISSN	18619541
Language	English
Publisher	SP Science in China Press
Publisher Date	2010-01-03
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	isopentane ozone photochemical smog MCM Engineering Earth Sciences Chemistry/Food Science Physics Life Sciences Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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