Experiment: 2014 FIXCIT Study_20140111_nitric oxide/ALPHA-PINENE/hydrogen peroxide_Hydroxyl radical_No Seed_Alpha-pinene + OH, high NO, dry, (NH4)2SO4 seed at end

Experiment

Name: 2014 FIXCIT Study_20140111_nitric oxide/ALPHA-PINENE/hydrogen peroxide_Hydroxyl radical_No Seed_Alpha-pinene + OH, high NO, dry, (NH4)2SO4 seed at end
Date: 2014-01-11

Organization
2014 FIXCIT Study

Chamber
Seinfeld chambers

Experiment Set
FIXCIT experiments

Goals
High NO oxidation of alpha-pinene to test products. Interested mainly in: organic nitrate yield from alpha-pinene at the high NO limit -products formed in high NO oxidation of alpha-pinene to confirm for CIMS instruments what potential products formed in SOAS -potential contribution of alpha-pinene derived nitrates to particle phase nitrates seen at SOAS. Secondary goals: potential effect of addition of seed aerosol on apparent loss rate of gas-phase compounds

Summary
The initial measurements of alpha -pinene and alkyl nitrates appeared to go well for PTR-MS and TD-LIF. Ozone began creeping up about ~30min into the experiment, reaching a maximum <90ppbv O3. NO was injected in after about an hour and 15 minutes after lights on to titrate out the ozone. Particle nucleation was observed roughly ~1hr 15min into the oxidation, potentially from an OH spike from the NO injection due to PNA buildup. After 08 ~5hrs of oxidation, the lights were turned off. Thirty minutes of dark sampling followed, at which point ammonium sulfate seed was injected into the chamber to determine what effect, if any, this will have on wall-loss of various species.

Experiment Details

Categories:

  • Gas phase chemical reaction
Temperature: 26
Relative Humidity: 5
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 5
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 2.5e6 (molecules_per_cubic_centimeter)
RO2 Main Fate: NO
RO2 Lifetime: (Seconds)
Pressure: 755

Data Sets

ID Instrument File  
101 GTHOS_OH 20140111_OH.csv
102 GTHOS_HO2 20140111_HO2.csv
103 CF3O-TOF-CIMS 20140111_TOFCIMSmerge.csv
1129 NO-CL FIX-NCAR_NO_CL-NO_Chamber_20140111_RA.csv
1130 RHTO3NOx FIX-CIT-RHTO3NOx_Chamber_20140111_RA.csv
1131 GC-FID FIX-CIT-GCFID-VOCs_Chamber_20140111_RB.csv
1132 TOF-AMS (High Resolution) 20140111_HRAMS.csv
1133 PTR-TOF-MS 20140111_PTRTOFMS.csv
1134 TD-LIF D20140111_TDLIF.csv
1135 NO3-TOF-CIMS 20140111_NO3CIMS.csv
1136 OHR-CRM 20140111_CRMOHR.csv
1137 OHR-LIF 20140111_LIFOHR.csv
1324 I-TOF-CIMS 20140111_ICIMS.csv

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

Experiment Set Details

Name: FIXCIT experiments
Time format and units: Seconds past midnight
Description:
The Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT) was a collaborative study at the atmospheric chambers of Caltech during January 2014. FIXCIT is the laboratory component of SOAS, and is aimed toward (1) better understanding the chemical details behind ambient observations relevant to the southeastern United States, (2) advancing the knowledge of atmospheric oxidation mechanisms of important biogenic hydrocarbons, and (3) characterizing the behavior of field instrumentation using authentic standards. A series of chamber experiments was conducted to investigate the oxidation of isoprene, α-pinene, methacrolein, pinonaldehyde, acylperoxy nitrates, isoprene hydroxy nitrates (ISOPN), isoprene hydroxy hydroperoxides (ISOPOOH), and isoprene epoxydiols (IEPOX). Pinonaldehyde and isomer-specific standards of ISOPN, ISOPOOH, and IEPOX were synthesized, enabling study of the oxidation mechanisms and instrument responses for these compounds.

Collaborators:

  • Allen H. Goldstein UC Berkeley
  • William H. Brune Penn State University
  • Ronald C. Cohen UC Berkeley
  • Delphine K. Farmer Colorado State University
  • Manjula R. Canagaratna Aerodyne
  • Douglas R. Worsnop Aerodyne
  • Jose L. Jimenez University of Colorado Boulder
  • Frank N. Keutsch Harvard
  • Saewung Kim UC Irvine
  • Alex B. Guenther UC Irvine
  • John E. Mak SUNY Stonybrook
  • Geoffrey S. Tyndall NCAR
  • Denise D. Montzka NCAR
  • Andrew J. Weinheimer NCAR
  • Alam Hasson Fresno State

Download

Download this Experiment (2.31 MB)

Contacts

Principal investigators:

Paul O. Wennberg
Phone: 626 395 2447
E-mail: wennberg@caltech.edu
OrcID: 0000-0002-6126-3854

John H. Seinfeld
Phone: 626-395-4635
E-mail: seinfeld@caltech.edu
OrcID: 0000-0003-1344-4068

John D. Crounse
Phone: 626-395-8655
E-mail: crounjd@caltech.edu
OrcID: 0000-0001-5443-729X

Tran B Nguyen
Phone: 5307525987
E-mail: tbn@ucdavis.edu
OrcID: 0000-0001-9206-4359

Data Manager:

Tran B. Nguyen
Phone: 5307525987
E-mail: tbn@ucdavis.edu

Reactants

Reactant Compound type Concentration Concentration units
nitric oxide (145068)
  • NOx
 85 Parts Per Billion
ALPHA-PINENE (6654)
  • Alkene
 30 Parts Per Billion
hydrogen peroxide (784) 2 Parts Per Million

20140111_expTimeline.csv Timeline

UTC_hr Action
16:29 alpha-pinene addition into the bag
16:59 stopped injecting alpha-pinene into the bag
17:00 instruments started sampling
17:30 instruments stopped sampling
17:30 H2O2 injection began
18:33 H2O2 injection stopped
18:36 NO injection began
18:45 NO injection stopped
19:00 instruments started sampling
19:30 50% of UV lights on
20:39 injected in NO to titrate out O3 pulsed air injection system
24:29 UV lights off
25:00 Ammonium sulfate aerosol injection into chamber (0.06M)
25:30 Ammonium sulfate aerosol stopped injecting into the chamber
26:00 Bag began flushing.

Citations
Cite this experiment: Publications associated with this experiment:

Characterizations
Light Flux Characterizations:
2013-12-16 (#18)
Particle Loss Characterizations:
2013-03-06 (#12)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: Seinfeld chambers
Volume in cubic meters: 22
Shape: Rectangular Prism
Surface area in cubic meters: 48
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date:
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background: < 0.5 ppb
nox background: 40 ppt
Particle background in micrograms per cubic meter: < 0.01 ug/m3
Air filtration method: Custom filtration canisters to remove NOx, hydrocarbons, water, particles, ozone, SOx from pressurized ambient air.
Mixing method: 1
Mixing method material: Pulsed air jets, manually actuated
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 10
Temparature range (max degrees celcius): 45
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 4
Relative humidity range (max percent): 90
Particle experiment capability: 1
Lights: Yes
Light source type(s): UV black lamps (350 nm centered)
Supplemental information: https://www.worldscientific.com/doi/abs/10.1142/9789813147355_0001
Additional Notes: