Experiment: 2014 FIXCIT Study_20140129_isoprene/ozone/CYCLOHEXANE_Ozone_No Seed_Isoprene + O3, cyclohexane OH scrubber, 50% humidity, no seeds

Experiment

Name: 2014 FIXCIT Study_20140129_isoprene/ozone/CYCLOHEXANE_Ozone_No Seed_Isoprene + O3, cyclohexane OH scrubber, 50% humidity, no seeds
Date: 2014-01-29

Organization
2014 FIXCIT Study

Chamber
Seinfeld chambers

Experiment Set
FIXCIT experiments

Goals
To measure HCHO yields from isoprene + O3 with humidity. To continue the diagnosis of the OH artifact in GTHOS.

Summary
The additions of the reagents went well and preliminary reports from experimenters confirmed the presence of the expected products.

Additional Notes
Instrument Status: TD LIF - up PTRMS - up CRM OHR - up GTHOS - up LIF OHR - off NO CL - up GLY LIP - up FOR LIF - up I/A CIMS - up NCIMS - up RHTO3 - up GC FID - up AMS - up TQC1 - up TQC2 - up TOFCIMS - up Bag Additions: 100 ppbv isoprene, 610 ppb O3, ~50 ppm cyclohexane, ~50% RH. Timeline (UTC, hrs): 14:49 - Start O3/T/RH/NOx monitors 15:00 - Start adding humidity 16:45 - Stop adding humidity and started adding air 16:57 - Air addition stopped 16:58 - Start O3 addition 18:36 - Air addition started 18:39 - Air additions stopped 18:45 - Stop O3 addition, injection line purge continued 19:09 - Start cyclohexane addition: 5.5 mL, with heat gun 19:14 - Stop cyclohexane addition; All instruments begin sampling 19:26 - Flow through injection blub stopped 19:48 - Start isoprene addition (10 uL) 19:58 - All addition flows stopped 24:30 - Temperature increase to 40 C started 25:04 - Heat ramp started to 40 C 25:30 - Temperature reached 39.7 C. Set to 25 C and instruments stopped sampling

Experiment Details

Categories:

  • Gas phase chemical reaction
Temperature: 25
Relative Humidity: 58
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 58
Reaction type:
Oxidant Name: Ozone
Initial Oxidant Concentration Value: 610 (parts_per_billion)
RO2 Main Fate: Not Sure
RO2 Lifetime: (Seconds)
Pressure: 750 Torr

Data Sets

ID Instrument File  
1294 TOF-AMS (Low Resolution) 20140129_AMS.csv
1295 GTHOS_OH 20140129_OH.csv
1296 GTHOS_HO2 20140129_HO2.csv
1297 RHTO3NOx FIX-CIT-RHTO3NOx_Chamber_20140129_RA.csv
1298 GC-FID FIX-CIT-GCFID-VOCs_Chamber_20140129_RA.csv
1299 FORM-LIF FIX-UWMad_FiLIFII-HCHO_Chamber_20140129_RA.csv
1300 CF3O TripleQ-CIMS 20140129_TRIPCIMSmerge.csv
1301 TOF-AMS (High Resolution) 20140129_HRAMS.csv
1302 CF3O-TOF-CIMS 20140129_TOFCIMSmerge.csv
1303 TD-LIF D20140129_TDLIF.csv
1304 NO3-TOF-CIMS 20140129_NO3CIMS.csv
1305 GLY-LIP 20140129_GLYLIP.csv
1306 OHR-CRM 20140129_CRMOHR.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 (1.62 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
isoprene
  • Alkene
 91 Parts Per Billion
ozone 610 Parts Per Billion
CYCLOHEXANE
  • Alkane
 50 Parts Per Million

20140129_expTimeline.csv Timeline

UTC_hr Action
14:49 Start O3/T/RH/NOx monitors
15:00 Start adding humidity
16:45 Stop adding humidity and started adding air
16:57 Air addition stopped
16:58 Start O3 addition
18:36 Air addition started
18:39 Air additions stopped
18:45 Stop O3 addition; injection line purge continued
19:09 Start cyclohexane addition: 5.5 mL with heat gun
19:14 Stop cyclohexane addition; All instruments begin sampling
19:26 Flow through injection bulb stopped
19:48 Start isoprene addition (10 uL)
19:58 All addition flows stopped
24:30 Temperature increase to 40 C started
25:04 Heat ramp started to 40 C
25:30 Temperature reached 39.7 C. Set to 25 C and instruments stopped sampling

Citations
Cite this experiment: Publications associated with this experiment:

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