The unimolecular ozone decomposition reaction

Heimerl, Joseph M.; Coffee, Terence P.

doi:10.1016/0010-2180(79)90015-4

Cited by 39 publications

(12 citation statements)

References 9 publications

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“…Then, these active species can react with O 3 (Eqs. 7-11) [25][26][27][28]. Ozone consumption becomes more efficient when the temperature increases: rate constants are increasing when O 3 is decomposed or reacts with O-atom, H, OH or HO 2 (Eqs.…”

Section: Active Species Discussionmentioning

confidence: 98%

Improvement of the Diluted Propane Efficiency Treatment Using a Non-thermal Plasma

Aubry

Cormier

2008

Plasma Chem Plasma Process

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The decomposition of propane diluted in air has been investigated using a pulsed high-voltage dielectric barrier discharges reactor. Effects of the temperature (from 300 to 800 K) and humidity in air on propane conversion and on produced species are studied. CO and CO 2 are the two main carbon species produced but other carbon species can be also obtained as functions of electrical parameters or temperature. Total decomposition of inlet propane to CO 2 is possible when propane is diluted in wet air from 600 K. Thermal energy is an important parameter to limit the energy density injected in the plasma reactor and to reduce the total energetic cost keeping a high propane decomposition yield.

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Section: Active Species Discussionmentioning

confidence: 98%

Improvement of the Diluted Propane Efficiency Treatment Using a Non-thermal Plasma

Aubry

Cormier

2008

Plasma Chem Plasma Process

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“…For the effect of ozone addition, the thermal decomposition reaction recommended by Heimerl and Coffee [33] was adopted. The rate constant is given as:…”

Section: Model Calculationmentioning

confidence: 99%

Chemical mechanistic analysis of additive effects in homogeneous charge compression ignition of dimethyl ether

Yamada

Yoshii

Tezaki

2005

Proceedings of the Combustion Institute

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“…5; Jones and Davidson, 1962;Heimerl and Coffee, 1979), a comparatively large signal is generated because the O atom reacts with C 2 H 6 to form two radicals, OH and C 2 H 5 (Baulch et al, 1994). This reaction is competitive in the PERCA inlet (compared to reaction of O with O 2 ) because of the high C 2 H 6 concentration (1.7 %): the lifetime of O with respect to reaction with C 2 H 6 is ∼ 0.34 ms, which is of similar magnitude as the expected lifetime of O with respect to reaction with O 2 of ∼ 0.15 ms (Hippler et al, 1990). We considered an alternate inlet configuration in which the inlet length between the NO and ethane addition points is increased to allow for sufficient residence time completely titrate O 3 with the added NO.…”

Section: Interferencesmentioning

confidence: 60%

Quantification of peroxynitric acid and peroxyacyl nitrates using an ethane-based thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer

et al. 2018

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Abstract. Peroxy and peroxyacyl nitrates (PNs and PANs) are important trace gas constituents of the troposphere which are challenging to quantify by differential thermal dissociation with NO2 detection in polluted (i.e., high-NOx) environments. In this paper, a thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer (TD-PERCA-CRDS) for sensitive and selective quantification of total peroxynitrates (ΣPN = ΣRO2NO2) and of total peroxyacyl nitrates (ΣPAN = ΣRC(O)O2NO2) is described. The instrument features multiple detection channels to monitor the NO2 background and the ROx ( = HO2 + RO2 + ΣRO2) radicals generated by TD of ΣPN and/or ΣPAN. Chemical amplification is achieved through the addition of 0.6 ppm NO and 1.6 % C2H6 to the inlet. The instrument's performance was evaluated using peroxynitric acid (PNA) and peroxyacetic or peroxypropionic nitric anhydride (PAN or PPN) as representative examples of ΣPN and ΣPAN, respectively, whose abundances were verified by iodide chemical ionization mass spectrometry (CIMS). The amplification factor or chain length increases with temperature up to 69 ± 5 and decreases with analyte concentration and relative humidity (RH). At inlet temperatures above 120 and 250 °C, respectively, PNA and ΣPAN fully dissociated, though their TD profiles partially overlap. Furthermore, interference from ozone (O3) was observed at temperatures above 150 °C, rationalized by its partial dissociation to O atoms which react with C2H6 to form C2H5 and OH radicals. Quantification of PNA and ΣPAN in laboratory-generated mixtures containing O3 was achieved by simultaneously monitoring the TD-PERCA responses in multiple parallel CRDS channels set to different temperatures in the 60 to 130 °C range. The (1 s, 2σ) limit of detection (LOD) of TD-PERCA-CRDS is 6.8 pptv for PNA and 2.6 pptv for ΣPAN and significantly lower than TD-CRDS without chemical amplification. The feasibility of TD-PERCA-CRDS for ambient air measurements is discussed.

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The unimolecular ozone decomposition reaction

Cited by 39 publications

References 9 publications

Improvement of the Diluted Propane Efficiency Treatment Using a Non-thermal Plasma

Improvement of the Diluted Propane Efficiency Treatment Using a Non-thermal Plasma

Chemical mechanistic analysis of additive effects in homogeneous charge compression ignition of dimethyl ether

Quantification of peroxynitric acid and peroxyacyl nitrates using an ethane-based thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer

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