Experiment: 2014 FIXCIT Study_20140125_METHACROLEIN/hydrogen peroxide_Hydroxyl radical_Ammonium sulfate_Methacrolein + OH, low NO, dry, (NH4)2SO4 seed at end

Experiment

Name: 2014 FIXCIT Study_20140125_METHACROLEIN/hydrogen peroxide_Hydroxyl radical_Ammonium sulfate_Methacrolein + OH, low NO, dry, (NH4)2SO4 seed at end
Date: 2014-01-25

Organization
2014 FIXCIT Study

Chamber
Seinfeld chambers

Experiment Set
FIXCIT experiments

Goals
Study methacrolein low NO chemistry.

Summary
We successfully oxidized MACR in low NO conditions. About 9 ppb was remaining by the time we turned off lights. After we turned off lights we added in dry ammonium sulfate seed and the AMS saw aerosol uptake. The main peaks increasing on the CF3O- CIMS were hydroxyacetone, acetic acid, formic acid, and peroxyacetic acid. Note the night prior to this experiment we cleaned the bag with Milli-Q water, and then flushed the bag overnight at 40 deg C to dry it. RH was typical in the morning at ~3%.

Additional Notes
Instrument Status: TD LIF - up PTRMS - up GTHOS - up LIF OHR - up CRM OHR - up NO CL - up GLY LIP - up (2L/min flow) FOR LIF - up I/A CIMS - up NCIMS - up RHTO3 - up GC FID - up AMS - up TQC1 - up TQC2 - up TOFCIMS - up Bag Additions: MACR injection 1, ppb (25.8 ppb verififed by FT-IR assuming 24 m^3 bag) MACR injection 2, ppb (18.5 ppb verififed by FT-IR assuming 24 m^3 bag) Total MACR by FT-IR 44.3 ppb, GC measured 43 ppb at the beginning of the experiment. H2O2, ~2 ppm (110 ul) Timeline (UTC, hrs): 16:15 - Lower temperature. 17:00 - GTHOS start sampling 17:24 - Cap Near bag. 17:40 - Inject 1st bulb MACR. 17:52 - Stop injecting 1st bulb MACR. 17:54 - Start injecting 2nd bulb MACR. 17:50 - Start filling bag in conjunction with addition of MACR. 18:04 - Stop injecting 2nd bulb MACR. 18:17 - Done filling. Everyone begins sampling. 18:49 - Everyone stop sampling and start H2O2 injection. 20:10 - Stop injecting H2O2 and add pulse air to mix. 20:10 - Everyone start sampling. 20:40 - Turn on lights (100%). 01:40 - Turn off lights. 02:10 - Inject ammonium sulfate seeds (0.1M). 02:39 - Stop seed injection. 02:56 - Everyone stop sampling and start flushing bag.

Experiment Details

Categories:

  • Gas phase chemical reaction
  • Aerosol formation
Temperature: 28
Relative Humidity: 5
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 5
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 3e6 (molecules_per_cubic_centimeter)
RO2 Main Fate: HO2
RO2 Lifetime: (Seconds)
Pressure: 750

Data Sets

ID Instrument File  
1252 TOF-AMS (Low Resolution) 20140125_AMS.csv
1253 GTHOS_OH 20140125_OH.csv
1254 GTHOS_HO2 20140125_HO2.csv
1255 RHTO3NOx FIX-CIT-RHTO3NOx_Chamber_20140125_RA.csv
1256 NO-CL FIX-NCAR_NO_CL-NO_Chamber_20140125_RA.csv
1257 FORM-LIF FIX-UWMad_FiLIFII-HCHO_Chamber_20140125_RA.csv
1258 GC-FID FIX-CIT-GCFID-VOCs_Chamber_20140125_RA.csv
1259 CF3O TripleQ-CIMS 20140125_TRIPCIMSmerge.csv
1260 PTR-TOF-MS 20140125_PTRTOFMS.csv
1261 NO3-TOF-CIMS 20140125_NO3CIMS.csv
1262 TD-LIF D20140125_TDLIF.csv
1263 CF3O-TOF-CIMS 20140125_TOFCIMSmerge.csv
1264 OHR-CRM 20140125_CRMOHR.csv
1265 I-TOF-CIMS 20140125_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 (2.54 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
METHACROLEIN
  • Alkene
  • Ketone
 43 Parts Per Billion
hydrogen peroxide 2 Parts Per Million

20140125_expTimeline.csv Timeline

UTC_hr Action
16:15 Lower temperature.
17:00 GTHOS start sampling
17:24 Cap Near bag.
17:40 Inject 1st bulb MACR.
17:52 Stop injecting 1st bulb MACR.
17:54 Start injecting 2nd bulb MACR.
17:50 Start filling bag in conjunction with addition of MACR.
18:04 Stop injecting 2nd bulb MACR.
18:17 Done filling. Everyone begins sampling.
18:49 Everyone stop sampling and start H2O2 injection.
20:10 Stop injecting H2O2 and add pulse air to mix.
20:10 Everyone start sampling.
20:40 Turn on lights (100%).
01:40 Turn off lights.
02:10 Inject ammonium sulfate seeds (0.1M).
02:39 Stop seed injection.
02:56 Everyone stop sampling and start flushing bag.

Citations
Cite this experiment: Publications associated with this experiment:

Characterizations
Light Flux Characterizations:
2013-12-16 (#17)
Particle Loss Characterizations:
2013-03-07 (#13)
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: