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
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 Sets
| ID | Instrument | File | |
|---|---|---|---|
| 4222 | SMPS (Far, number) |
20220724_SMPS_Number.csv
|
|
| 4223 | O3 monitor (far) |
20220724_O3_time.csv
|
|
| 4224 | CAPS NO2 monitor (far) |
20220724_NO2_time.csv
|
|
| 4225 | Thermo NOx (far) |
20220724_NO_time.csv
|
|
| 4226 | SMPS (Far, volume) |
20220724_SMPS_Volume.csv
|
Data Set plots
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
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 |
Citations
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: