Experiment: Hildebrandt Ruiz Lab_20180117_DODECANE/nitric oxide/nitrite_Chlorine radical_Ammonium sulfate_high RH

Experiment

Name: Hildebrandt Ruiz Lab_20180117_DODECANE/nitric oxide/nitrite_Chlorine radical_Ammonium sulfate_high RH
Date: 2018-01-17

Organization
Hildebrandt Ruiz Lab

Chamber
LHR Chamber

Experiment Set
Alkanes + Cl + NOx

Goals
Find SOA yield for dodecane + Cl under high NOx condition (NO and NO2 injected) at RH=67%. Investigate volatility behavior based on 2D thermograms.

Summary
Ammonium sulfate seed (0.01M, 150 mL) was injected using an aerosol generation system. Cl2 gas, NO and NO2 gas were injected from their cylinders. 90 ug/m3 of dodecane was injected into a glass bulb and heated clean air was made to flow over it, carrying the volatilized dodecane into the chamber. After ~30 mins (sufficient mixing time), lights were turned on for 1 hour. 98.9 ug/m3 of SOA was formed, giving a mass yield of 1.10. This is Exp#12 in associated publication.

Additional Notes
In the ACSM .csv file, exp_time_ACSM=0 is the time at which UV lights are turned on. Traces labelled as "X_corr_S" have been corrected for particle phase wall losses based on SEMS volume data.

Experiment Details

Categories:

  • Gas phase chemical reaction
  • Volatility and partitioning
  • Aerosol formation
Temperature: 25
Relative Humidity: 67
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 67
Reaction type:
Oxidant Name: Chlorine radical
Initial Oxidant Concentration Value: 40.4 (parts_per_billion)
RO2 Main Fate: Not Sure
RO2 Lifetime: (Seconds)
Pressure:

Data Sets

ID Instrument File  
440 Labview 2018_01_17_Dodecane_NONO2_Chl_HighRH_Labview.csv
1538 ACSM 2018_01_17_ACSM_wall_loss_corr.csv

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

Experiment Set Details

Name: Alkanes + Cl + NOx
Time format and units: CST time following format hh:mm AM/PM
Description:
Chlorine-initiated oxidation of n-Alkanes (C8-12) under high nitrogen oxides conditions was investigated. 12 experiments were conducted overall where secondary organic aerosol yields were determined, vapor and particle-phase product composition was studied (using FIGAERO-CIMS), and two-dimensional thermograms from the FIGAERO data were used to investigate volatility of products formed.

Collaborators:

  • Dongyu S Wang University of Texas at Austin, now at Paul Scherrer Institute in Switzerland
  • Lea Hildebrandt Ruiz University of Texas at Austin

Download

Download this Experiment (233.98 KB)

Contacts

Principal investigator:

Lea Hildebrandt Ruiz
E-mail: lhr@che.utexas.edu
OrcID: 0000-0001-8378-1882

Data Manager:

Lea Hildebrandt Ruiz
E-mail: lhr@che.utexas.edu

Reactants

Reactant Compound type Concentration Concentration units
DODECANE (8182)
  • Alkane
 90 Microgram Per Cubic Meter
nitric oxide (145068)
  • NOx
 20 Parts Per Billion
nitrite (946)
  • NOx
 17 Parts Per Billion

2018_01_17_Dod_Cl_NO_NO2_RH.csv Timeline

Time (CST) Event
2:06 PM Just finished a chamber blank, now looking at chamber gas-phase
2:14 PM Injecting 1.2 ul of dodecane, 20% heating, 2 LPM clean air.
2:15 PM Start of Cl2 injection, 1 LPM for 4 mins
2:19 PM Cl2 injection finished
2:46 PM UV on (5/5)
3:46 PM UV off (5/5)
4:21 PM starting FIGAERO collection
4:27 PM TD at 40 C
4:43 PM TD BP, heat to 50 C
4:51 PM FIGAERO collection finished
4:51 PM Acquisition aborted after 118 complete writes. 1 additional bufs in the incomplete last write.
4:58 PM TD at 50 C
5:10 PM TD BP, heat to 60 C
5:25 PM TD at 60 C
5:37 PM TD BP, heat to 70 C
5:59 PM TD at 70 C
6:09 PM TD BP, heat to 80 C
6:29 PM TD at 80 C
6:45 PM TD BP, heat to 90 C
6:54 PM TD at 90 C
7:07 PM TD BP, heat to 100 C
7:13 PM TD BP, heat to 115 C
7:16 PM TD at 100 C
7:43 PM TD at 115 C
7:59 PM TD BP, heat to 130 C
8:12 PM TD at 130 C
8:27 PM TD BP, heat to 145 C
8:48 PM TD at 145 C

Citations
Cite this experiment: Publication associated with this experiment:

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

Chamber Details

Name: LHR Chamber
Volume in cubic meters: 8.92
Shape: Rectangular Prism
Surface area in cubic meters: 26.4
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 5.0
Replacement date: 2018-06-15
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background:
nox background:
Particle background in micrograms per cubic meter: < 10 counts/cm3
Air filtration method: NA
Mixing method: 0
Mixing method material:
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 5
Temparature range (max degrees celcius): 50
Humidity Control: No
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0
Relative humidity range (max percent): 85
Particle experiment capability: 1
Lights: Yes
Light source type(s): UV-A Blacklight
Supplemental information:
Additional Notes: