scholarly journals Production and Measurement of Organic Particulate Matter in a Flow Tube Reactor

10.3791/55684 ◽  
2018 ◽  
Author(s):  
Yue Zhang ◽  
Pengfei Liu ◽  
Zhaoheng Gong ◽  
Franz M. Geiger ◽  
Scot T. Martin
Keyword(s):  
Particulate Matter ◽  
Flow Tube ◽  
Organic Particulate Matter ◽  
Tube Reactor

scholarly journals Kinetics of 1- and 2-methylallyl + O2 reaction, investigated by photoionisation using synchrotron radiation

2021 ◽  
Author(s):  
Domenik Schleier ◽  
Engelbert Reusch ◽  
Marius Gerlach ◽  
Tobias Preitschopf ◽  
Deb Pratim Mukhopadhyay ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Reaction Kinetics ◽  
Molecular Oxygen ◽  
Light Source ◽  
Storage Ring ◽  
Vacuum Ultraviolet ◽  
Flow Tube ◽  
Tube Reactor ◽  
Swiss Light Source ◽  
Kinetics Of

The reaction kinetics of the isomers of the methylallyl radical with molecular oxygen has been studied in a flow tube reactor at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source storage ring.

scholarly journals Linking Oxidative Events to Inflammatory and Adaptive Gene Expression Induced by Exposure to an Organic Particulate Matter Component

2012 ◽  
Vol 120 (2) ◽  
pp. 267-274 ◽  
Author(s):  
Wan-Yun Cheng ◽  
Jenna Currier ◽  
Philip A. Bromberg ◽  
Robert Silbajoris ◽  
Steven O. Simmons ◽  
...  
Keyword(s):  
Gene Expression ◽  
Particulate Matter ◽  
Organic Particulate Matter ◽  
Matter Component

N2O5 reactive uptake kinetics and chlorine activation on authentic biomass-burning aerosol

2019 ◽  
Vol 21 (10) ◽  
pp. 1684-1698
Author(s):  
Lexie A. Goldberger ◽  
Lydia G. Jahl ◽  
Joel A. Thornton ◽  
Ryan C. Sullivan
Keyword(s):  
Biomass Burning ◽  
Uptake Kinetics ◽  
Flow Tube ◽  
Aerosol Flow ◽  
Nitryl Chloride ◽  
Nitrogen Pentoxide ◽  
Tube Reactor ◽  
Biomass Burning Aerosol ◽  
Kinetics Of

The reactive uptake kinetics of nitrogen pentoxide (N2O5) to authentic biomass-burning aerosol and the production of nitryl chloride (ClNO2) was determined using an entrained aerosol flow tube reactor.

scholarly journals Relative humidity-dependent viscosity of secondary organic material from toluene photo-oxidation and possible implications for organic particulate matter over megacities

2016 ◽  
Author(s):  
M. Song ◽  
P. F. Liu ◽  
S. J. Hanna ◽  
R. A. Zaveri ◽  
K. Potter ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Relative Humidity ◽  
Diffusion Coefficients ◽  
Organic Material ◽  
Organic Molecules ◽  
Mixing Times ◽  
Organic Particulate Matter ◽  
Photo Oxidation ◽  
Diffusion Rates ◽  
And Diffusion

Abstract. To improve predictions of air quality, visibility, and climate change, knowledge of the viscosities and diffusion rates within organic particulate matter consisting of secondary organic material (SOM) is required.Most qualitative and quantitative measurements of viscosity and diffusion rates within organic particulate matter have focused on SOM particles generated from biogenic VOCs such as α-pinene and isoprene. In this study, we quantify the relative humidity (RH)-dependent viscosities at 295 ± 1 K of SOM produced by photo-oxidation of toluene, an anthropogenic VOC. The viscosities of toluene-derived SOM were 2 × 10−1 to ∼6 × 106 Pa·s from 30 to 90 % RH, and greater than ~2 × 108 Pa·s (similar to or greater than the viscosity of tar pitch) for RH ≤ 17 %. These viscosities correspond to Stokes-Einstein-equivalent diffusion coefficients for large organic molecules of ~2 × 10−15 cm2·s−1 for 30 % RH, and lower than ~3 × 10−17 cm2·s−1 for RH ≤ 17 %. Based on these estimated diffusion coefficients, the mixing time of large organic molecules within 200 nm toluene-derived SOM particles is 0.1–5 hr for 30 % RH, and higher than ~100 hr for RH ≤ 17 %. These results were used, as a first-order approximation, to estimate if organic particulate matter will be in well-mixed over the world's top 15 most populous megacities. If the organic particulate matter in the megacities is similar to the toluene-derived SOM in this study, in Kolkata, Istanbul, Dhaka, Tokyo, Shanghai, and Mumbai, mixing times in organic particulate matter during extended periods of the year will be very short, and well-mixed particles can be assumed. On the other hand, the mixing times of large organic molecules in organic particulate matter in Delhi, Beijing, Mexico City, Cairo, and Karachi may be long and the particles may not be well-mixed in the afternoon (3:00–5:00 local time) during certain times of the year.

A gas-phase synthesis of Ag-centered phenylenediamine clusters

2020 ◽  
Vol 8 (30) ◽  
pp. 10325-10332
Author(s):  
Mengdi Guo ◽  
Baoqi Yin ◽  
Benben Huang ◽  
Haiming Wu ◽  
Zhixun Luo
Keyword(s):  
Gas Phase ◽  
Soft Landing ◽  
Flow Tube ◽  
Phase Synthesis ◽  
Gas Phase Synthesis ◽  
Tube Reactor

Gas-phase synthesis of Ag-centered phenylenediamine clusters is achieved by dual sources combined with a flow tube reactor, producing Raman-active soft-landing deposits.

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