Experiment: Browne Lab_20230817_Hydrogen Peroxide/Cyclomethicone 5_Hydroxyl radical_Ammonium sulfate_E4

Experiment

Name: Browne Lab_20230817_Hydrogen Peroxide/Cyclomethicone 5_Hydroxyl radical_Ammonium sulfate_E4
Date: 2023-08-17

Organization
Browne Lab

Chamber
1-White (1W)

Experiment Set
D5 oxidation ammonium sulfate seed

Goals
Investigate SOA formation from D5 oxidation with ammonium sulfate seeds with CIMS, SMPS, AMS. Filter samples were collected.

Summary
The siloxanol was the major gas-phase and particle-phase product, small amounts of SOA were formed via adsorption.

Additional Notes
Air handler failed and temperature rose 10 degrees over the course of an hour. D5 increased after the lights turned on. Chamber bag volume is changed several times to maintain the pressure in the chamber.

Experiment Details

Categories:

  • Gas phase chemical reaction
  • Aerosol formation
Temperature: 22-32
Relative Humidity: 0
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value: 16000000000
Seed Concentration Units: particles_per_cubic_meter
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 1.4e7 (molecules_per_cubic_centimeter)
RO2 Main Fate: HO2
RO2 Lifetime: (Seconds)
Pressure: 860 mbar

Data Sets

ID Instrument File  
4541 Toluene CIMS E4_CIMS.csv
4542 1W Chamber Sensors E4_chamber.csv
4543 SMPS E4_SMPS.csv

Data Set plots
Choose a file: Choose the X-Axis:

Experiment Set Details

Name: D5 oxidation ammonium sulfate seed
Time format and units: M/D/YYYY h:mm:ss (local)
Description:
CIMS, SMPS, AMS, chamber data (if available) for measurements of D5 oxidation with H2O2 oxidant precursor. Ammonium sulfate seed aerosol.

Collaborators:

  • Hanalei Lewine University of Colorado Boulder
  • Eleanor C Browne University of Colorado Boulder

Download

Download this Experiment (22.36 KB)

Contacts

Principal investigator:

Eleanor Browne
Phone: 303-735-7685
E-mail: eleanor.browne@colorado.edu
OrcID: 0000-0002-8076-9455

Data Manager:

Eleanor Browne
E-mail: eleanor.browne@colorado.edu

Reactants

Reactant Compound type Concentration Concentration units
Hydrogen Peroxide (784)
  • Hydroperoxide
 3 Parts Per Million
Cyclomethicone 5 (10913) 52 Parts Per Billion

E4_timeline.csv Timeline

tlocal_event event
8/17/2023 09:06:59 adding 2 g/L AS seed
8/17/2023 09:22:48 stopped adding seed
8/17/2023 09:29:45 finished injecting D5 and ran fan
8/17/2023 09:52:07 finished injecting H2O2 and ran fan
8/17/2023 09:53:46 filling chamber to full volume
8/17/2023 10:40:23 lights on
8/17/2023 13:15:57 air handler communication back on line
8/17/2023 13:17:48 decided to keep chamber at 33 C
8/17/2023 13:37:51 lights off
8/17/2023 13:40:00 starting filter sampling
8/17/2023 13:39:52 lowered top of chamber
8/17/2023 14:18:00 lowered top of chamber
8/17/2023 14:57:00 lowered top of chamber
8/17/2023 16:02:00 lowered top of chamber
8/17/2023 16:38:00 stop filter collection

Citations

Characterizations
Light Flux Characterizations:
(None)
Particle Loss Characterizations:
(None)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: 1-White (1W)
Volume in cubic meters: 20
Shape: Rectangular Prism
Surface area in cubic meters: 22.65
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date: 2014-07-01
Replacement frequency: As needed
Cleaning method: Flushing with air
o3 background: 0
nox background: 0
Particle background in micrograms per cubic meter:
Air filtration method: AADCO 737-15, Parker Balston IT0500-3560
Mixing method: 1
Mixing method material: PTFE-coated steel fan
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 4
Temparature range (max degrees celcius): 40
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0
Relative humidity range (max percent): 85
Particle experiment capability: 1
Lights: Yes
Light source type(s): UVA Black Lamps, Visible fluorescent bulbs
Supplemental information: This chamber is the same as the Jimenez lab 1W chamber (https://icarus.ucdavis.edu/chamber/534).
Additional Notes: UV_LIGHT_TYPE: F40/350BL/ECO (40W) and FR48T12/BL-350/VHO/182 (115W) UV_LIGHT_PEAK_EMISSION_WAVELENGTH (nm): 350 (FWHM=20) VISIBLE_LIGHT_TYPE: T5HO tubes (54W) VISIBLE_LIGHT_PEAK_EMISSION_WAVELENGTH (nm): 490 Number of lights: x 115W UV tubes, y 40W UV tubes, z Vis tubes All three types of lights are evenly distributed between four walls of the chamber See light characterization metafiles for more information.