Particle mass yield from &amp;lt;i&amp;gt;β&amp;lt;/i&amp;gt;-caryophyllene ozonolysis

Chen, Q.; Li, Yong Jie; McKinney, K. A.; Kuwata, Mikinori; Martin, Scot T.

doi:10.5194/acp-12-3165-2012

Cited by 49 publications

(69 citation statements)

References 66 publications

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“…The aerosol density was found to be insensitive to a range of other experimental parameters, including starting α-phellandrene and ozone concentrations, aerosol loading, aerosol oxidation state and the presence of CI scavengers. These findings are in contrast to studies conducted on α-pinene (Shilling et al, 2009) and β-caryophyllene (Chen et al, 2012), in which particle density was found to decrease as chamber aerosol loadings Figure 11. Impact of sCI scavengers on particle nucleation shown by (a) peak particle number distributions scaled for the amount of α-phellandrene reacted in all experiments and (b) particle number distributions evolution over the first hour of experiments 1 and 6.…”

Section: Soa Formationcontrasting

confidence: 55%

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation

et al. 2017

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Abstract. The ozonolysis of α-phellandrene, a highly reactive conjugated monoterpene largely emitted by Eucalypt species, is characterised in detail for the first time using a smog chamber at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. Gas-phase species were monitored by a proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF), with yields from a large number of products obtained, including formaldehyde (5-9 %), acetaldehyde (0.2-8 %), glyoxal (6-23 %), methyl glyoxal (2-9 %), formic acid (22-37 %) and acetic acid (9-22 %). Higher m/z second-generation oxidation products were also observed, with products tentatively identified according to a constructed degradation mechanism. OH yields from α-phellandrene and its first-generation products were found to be 35 ± 12 and 15 ± 7 %, respectively, indicative of prominent hydroperoxide channels. An average first-generation rate coefficient was determined as 1.0 ± 0.7 × 10 −16 cm 3 molecule −1 s −1 at 298 K, showing ozonolysis as a dominant loss process for both α-phellandrene and its first-generation products in the atmosphere. Endocyclic conjugation in α-phellandrene was also found to be conducive to the formation of highly condensible products with a large fraction of the carbon mass partitioning into the aerosol phase, which was monitored with a scanning mobility particle sizer (SMPS) and a high-resolution timeof-flight aerosol mass spectrometer (AMS). Nucleation was observed almost instantaneously upon ozonolysis, indicating the rapid formation of extremely low-volatility compounds. Particle nucleation was found to be suppressed by the addition of either NO 2 or a Criegee scavenger, with it being proposed that stabilised Criegee intermediates are important for new particle formation in the system. Aerosol yields ranged from 25 to 174 % depending on mass loadings, with both first-and second-generation products identified as large contributors to the aerosol mass. In short, with a high chemical reactivity and aerosol-forming propensity, α-phellandrene is expected to have an immediate impact on the local environment to which it is emitted, with ozonolysis likely to be an important contributor to the significant blue haze and frequent nocturnal nucleation events observed over Eucalypt forests.

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Section: Soa Formationcontrasting

confidence: 55%

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation

et al. 2017

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“…This suggests that the magnitude of losses of vapors to the walls for this fastreacting system is of the same order as the variability of the yields calculated in the rest of the experiments, with artifacts of the order of 20-30 %. The average density of the SOA formed in the ozonolysis experiments was 0.99 ± 0.05 µg m −3 (Table 1), a value lower than the values calculated by Chen et al (2012). The approaches that were used for the density estimation are different; we matched the full distributions, while Chen et al (2012) relied on the mass mode diameters.…”

Section: Ozonolysismentioning

confidence: 92%

“…Winterhalter et al (2009) Lee et al (2006a, b), Alfarra et al (2012) and Hoffmann et al (1997) calculated the SOA assuming an effective density ranging from 1 to 1.3 µg m −3 , depending on the study. Chen et al (2012) estimated effective density values from 1.23 to 1.81 µg m −3 for their experiments. Relative humidity and temperature might also affect the yield.…”

Section: Introductionmentioning

confidence: 90%

“…Winterhalter et al (2009) reported SOA yields of 6 to 41 % for 50-440 µg m −3 of SOA. Chen et al (2012) found that the SOA yield is sensitive to the O 3 concentration, especially for SOA levels higher than 10 µg m −3 . They measured SOA yields of 8 to 46 % for 0.5-170 µg m −3 of SOA for the reaction of β-caryophyllene with 50 ppb of O 3 , 15.8 to 60 % for 2.1-230 µg m −3 of SOA for 100 ppb of O 3 , and 14.6 to 69.5 % for 1.9-77.4 µg m −3 of SOA for 200 ppb of O 3 .…”

Section: Introductionmentioning

confidence: 93%

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Formation and chemical aging of secondary organic aerosol during the β-caryophyllene oxidation

Tasoglou

Pandis

2015

Atmos. Chem. Phys.

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Abstract. The secondary organic aerosol (SOA) production during the oxidation of β-caryophyllene by ozone (O 3 ) and hydroxyl radicals (OH) and the subsequent chemical aging of the products during reactions with OH were investigated. Experiments were conducted with ozone and with hydroxyl radicals at low NO x (zero added NO x ) and at high NO x (hundreds of parts per billion). The SOA mass yield at 10 µg m −3 of organic aerosol was 27 % for the ozonolysis, 20 % for the reaction with OH at low NO x , and 38 % at high NO x under dry conditions, 20 • C, and ozone excess. Parameterizations of the fresh SOA yields have been developed. The average fresh SOA atomic O : C ratio varied from 0.24 to 0.34 depending on the oxidant and the NO x level, while the H : C ratio was close to 1.5 for all systems examined. An average density of 1.06 ± 0.1 µg m −3 of the β-caryophyllene SOA was estimated. The exposure to UV light had no effect on the β-caryophyllene SOA concentration and aerosol mass spectrometer (AMS) measurements. The chemical aging of the β-caryophyllene SOA produced was studied by exposing the fresh SOA to high concentrations (10 7 molecules cm −3 ) of OH for several hours. These additional reactions increased the SOA concentration by 15-40 % and O : C by approximately 25 %. A limited number of experiments suggested that there was a significant impact of the relative humidity on the chemical aging of the SOA. The evaporation rates of β-caryophyllene SOA were quantified by using a thermodenuder allowing us to estimate the corresponding volatility distributions and effective vaporization enthalpies.

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“…β-caryophyllene was the main sesquiterpene in many emission studies in boreal forests Tarvainen et al, 2005), but it has never been detected in the ambient air, due its high reactivity. β-caryophyllene could be a major source of SOA, due to its reactivity and high aerosol yields in smog chamber studies (Jaoui et al, 2003;Lee et al, 2006;Chen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Acidic reaction products of monoterpenes and sesquiterpenes in atmospheric fine particles in a boreal forest

et al. 2014

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Abstract. Biogenic acids were measured in aerosols at the SMEAR II (Station for Measuring Forest EcosystemAtmosphere Relations II) station in Finland from June 2010 until October 2011. The analysed organic acids were pinic, pinonic, caric, limonic and caryophyllinic acids from oxidation of α-pinene, β-pinene, limonene, 3 -carene and β-caryophyllene, respectively. Due to a lack of authentic standards, the caric, limonic and caryophyllinic acids were synthesised for this study. The mean, median, maximum and minimum concentrations (ng m −3 ) were as follows: limonic acid (1.26, 0.80, 16.5, below detection limit (< LOD)), pinic acid (5.53, 3.25, 31.4, 0.15), pinonic acid (9.87, 5.07, 80.1, < LOD), caric acid (5.52, 3.58, 49.8, < LOD), and caryophyllinic acid (7.87, 6.07, 86.1, < LOD).The highest terpenoic acid concentrations were measured during the summer. Of the acids, β-caryophyllinic acid showed the highest concentrations in summer, but during other times of the year pinonic acid was the most abundant. The β-caryophyllinic acid contribution was higher than expected, based on the emission calculations of the precursor compounds and yields from oxidation experiments in smog chambers, implying that the β-caryophyllene emissions or β-caryophyllinic acid yields were underestimated. The concentration ratios between terpenoic acids and their precursors were clearly lower in summer than in winter, indicating stronger partitioning to the aerosol phase during the cold winter season. The β-caryophyllinic and caric acids were weakly correlated with the accumulation-mode particle number concentrations.

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Particle mass yield from <i>β</i>-caryophyllene ozonolysis

Cited by 49 publications

References 66 publications

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation

Formation and chemical aging of secondary organic aerosol during the β-caryophyllene oxidation

Acidic reaction products of monoterpenes and sesquiterpenes in atmospheric fine particles in a boreal forest

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Particle mass yield from &lt;i&gt;β&lt;/i&gt;-caryophyllene ozonolysis

Cited by 49 publications

References 66 publications

Ozonolysis of &lt;i&gt;α&lt;/i&gt;-phellandrene – Part 1: Gas- and particle-phase characterisation

Ozonolysis of &lt;i&gt;α&lt;/i&gt;-phellandrene – Part 1: Gas- and particle-phase characterisation

Formation and chemical aging of secondary organic aerosol during the β-caryophyllene oxidation

Acidic reaction products of monoterpenes and sesquiterpenes in atmospheric fine particles in a boreal forest

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Particle mass yield from <i>β</i>-caryophyllene ozonolysis

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation

Ozonolysis of <i>α</i>-phellandrene – Part 1: Gas- and particle-phase characterisation