Aug 23, 2023

ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20150208_METHACROLEIN/Methyl nitrite/10102-44-0_Hydroxyl radical_Ammonium sulfate_RH85%

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Version: 20230823-020155

Goals:
This experiment was done to study the Methacrolein high NO2 photoxidation in the presence of fully deliquesced ammonium sulfate (AS) seeds at RH 85%, since the other experiments were done at low RH and without seed particles. The hypothesis is that particle liquid water will decrease SOA formation because water will hydrolyze HMML instead of allowing it to oligomerize on the particle surface. This liquid water is also hypothesized to liberate 2-methylgycleric acid (2MGA) from the aerosol to the gas phase.

Summary:
Gas-phase 2MGA is significantly enhanced and aerosol mass is significantly decreased compared to the dry experiments.

Organization: Caltech Atmospheric Chamber
Lab Affiliation: California Institute of Technology, Pasadena, CA
Chamber: Near/Far Bag 2012-2015 (Tran)

Experiment Category: Gas phase chemical reaction, Aerosol formation
Oxidant: Hydroxyl radical
Reactants: METHACROLEIN, Methyl nitrite, 10102-44-0
Reaction Type: Photooxidation
Relative Humidity: 85
Temperature: 25
Seed Name: Ammonium sulfate
Pressure: 750 Torr

DOI: https://doi.org/10.5065/vmct-p141

ICARUS Experiment Details: https://icarus.ucdavis.edu/experiment/622

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Temporal Range: 2015-02-08 to 2015-02-08

Related Links: Publication - Mechanism of the hydroxyl radical oxidation of methacryloyl peroxynitrate (MPAN) and its pathway toward secondary organic aerosol formation in the atmosphere

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Support Contact

Kong, Stephanie
Caltech Atmospheric Chamber
wkong@caltech.edu

Data Curator

GDEX Curator
UCAR/NCAR - GDEX
gdex@ucar.edu

Legal Constraints: Creative Commons Attribution 4.0 International License.

Access Constraints: These data are openly accessible by all registered users. Accounts are available free of charge following the registration of user information with a valid email address.

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Authors: Seinfeld, John

Publisher

ICARUS Community

Suggested Citation: Seinfeld, John. (2023). ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20150208_METHACROLEIN/Methyl nitrite/10102-44-0_Hydroxyl radical_Ammonium sulfate_RH85%. Version 20230823-020155. ICARUS Community. https://doi.org/10.5065/vmct-p141. Accessed 08 Nov 2024.

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