Experiment: Ng Research Group_20220724_alpha-Pinene/Limonene_Nitrate radical_Ammonium sulfate_MIX-2

Experiment

Name: Ng Research Group_20220724_alpha-Pinene/Limonene_Nitrate radical_Ammonium sulfate_MIX-2
Date: 2022-07-24

Organization
Ng Research Group

Chamber
Georgia Tech Environmental Chamber (Far)

Experiment Set
MultiPrecursor_Takeuchi

Goals
To evaluate whether or not the formation and properties of secondary organic aerosol (SOA) formed via simultaneous oxidation of a-pinene and limonene can be described as linear combinations of pure a-pinene and limonene systems. Repeat experiment.

Summary
2 uL of liquid a-pinene and 0.4 uL of liquid limonene were injected, followed by the injection of 140 ppb of N2O5 (source of nitrate radical) at a rate of 11.3 ppb min-1.

Additional Notes
Initial oxidant concentration is the injected N2O5 concentration.

Experiment Details

Categories:

  • Gas phase chemical reaction
  • Condensed-phase chemical reaction
  • Volatility and partitioning
  • Aerosol formation
Temperature: 5
Relative Humidity: 0-2
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0-2
Reaction type:
Oxidant Name: Nitrate radical
Initial Oxidant Concentration Value: 140 (parts_per_billion)
RO2 Main Fate: Not Sure
RO2 Lifetime: (Seconds)
Pressure:

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

Experiment Set Details

Name: MultiPrecursor_Takeuchi
Time format and units: Time is either ET or in min.
Description:
To understand whether or not the formation and properties of secondary organic aerosol (SOA) in multi-precursor systems can be described linearly using respective single-precursor systems. The system to investigate is nitrate radical oxidation of a-pinene and limonene.

Collaborators:

Contacts

Principal investigator:

Nga (Sally) Lee Ng
E-mail: ng@chbe.gatech.edu
OrcID: 0000-0001-8460-4765

Data Manager:

Taekyu Joo
Phone: (404) 385-2149
E-mail: tjoo6@gatech.edu

Reactants

Reactant Compound type Concentration Concentration units
alpha-Pinene (6654)
  • Alkene
138.6 Microgram Per Cubic Meter
Limonene (22311)
  • Alkene
27.9 Microgram Per Cubic Meter

20220724_TimeLine.csv Timeline

Time (ET) Action
12:00 GC on
12:30 SMPS on
12:32 FIGAERO-CIMS on
12:40 AMS on filter
13:00 AMS on chamber
13:00 RHT/NOx/O3 on
13:20 Seed injection starts
13:25 VOC injection starts (limonene)
13:35 VOC injection ends (limonene)
13:35 VOC injection starts (a-pinene)
13:45 VOC injection ends (a-pinene)
13:50 Seed injection ends
15:00 N2O5 injection starts
15:12:20 N2O5 injection ends
15:36 GC off
20:00 RHT/NOx/O3 off
20:00 SMPS off
20:00 AMS off
20:32 FIGAERO-CIMS off

Characterizations
Light Flux Characterizations:
(None)
Particle Loss Characterizations:
2022-06-30 (#36)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: Georgia Tech Environmental Chamber (Far)
Volume in cubic meters: 12.6
Shape:
Surface area in cubic meters: 32.48865
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness:
Replacement date: 2017-02-07
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on
o3 background: 3
nox background: 1
Particle background in micrograms per cubic meter:
Air filtration method: Pure air generator with membrane filter dryer
Mixing method: 0
Mixing method material:
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): 2
Relative humidity range (max percent): 70
Particle experiment capability: 1
Lights: Yes
Light source type(s): UVA Black Lamps, Natural Sunlight
Supplemental information:
Additional Notes: