Experiment: NCAR_20170727_nitric oxide/ozone_Nitrate radical_No Seed_CSTR_blank_170727


Name: NCAR_20170727_nitric oxide/ozone_Nitrate radical_No Seed_CSTR_blank_170727
Date: 2017-07-27


NCAR 3rd Floor Teflon

Experiment Set
'Intermediate-NO' regime experiments

Probing the steady state NO and O3 concentration that could be reached by varying the concentrations of reactants O3 and NO in the dark experiment

First, a given amount of O3 is continuously injected into the chamber till the steady state is established. Second, a given amount of NO is injected into the chamber till another steady state is established.

Experiment Details


  • Gas phase chemical reaction
  • Blank/Control
Temperature: 25
Relative Humidity: 10
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 10
Reaction type:
Oxidant Name: Nitrate radical
Initial Oxidant Concentration Value: 0 (molecules_per_cubic_centimeter)
RO2 Main Fate: No RO2 chemistry
RO2 Lifetime: (Seconds)
Pressure: 0.8 atm

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

Experiment Set Details

Name: 'Intermediate-NO' regime experiments
Time format and units:
We performed a series of experiments running at continuous flow steady state mode, focusing on establishing an ‘intermediate NO’ regime characterized by a constant steady-state NO level ranging from tens of ppt to a few ppb in the chamber



Principal investigator:

John Orlando
Phone: 303 497 1486
E-mail: orlando@ucar.edu

Data Manager:

Geoff Tyndall
Phone: 303 497 1472
E-mail: tyndall@ucar.edu


Reactant Compound type Concentration Concentration units
nitric oxide
  • NOx
Parts Per Billion
  • Hydroperoxide
  • O3
Parts Per Billion

Timeline_CSTR_blank_170727.csv Timeline

Time_UTC Event Description
17:30 started DOS injection , 30 minute injection = 150 ug/m3
18:18 injected VOC (50 ul C6, 40 ul C8, 25 uL C9, 18 uL C10) (fan on 1 min)
18:24 injected 26 Torr (2 L bulb) NO, Fan on 1 min
18:30 Injected 27 Torr MeNO2 ,Fan on 1 min
18:34 started UV cycle
20:06 started flush cycle to clean bag (experiment end)

Light Flux Characterizations:
Particle Loss Characterizations:
Vapor Loss Characterizations:

Chamber Details

Name: NCAR 3rd Floor Teflon
Volume in cubic meters: 10
Shape: Rectangular Prism
Surface area in cubic meters: 27.85
Flow Mode: CSTR
Flow through rate in liters per minute: 40
Body Material: Teflon
Body thickness: 5
Replacement date: 2017-01-17
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on
o3 background: 0
nox background: 0.025
Particle background in micrograms per cubic meter: 0.1
Air filtration method: Model 737, Aadco Instruments, OH
Mixing method: 0
Mixing method material:
Temparature Control: No
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 22
Temparature range (max degrees celcius): 35
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 3
Relative humidity range (max percent): 85
Particle experiment capability: 1
Lights: Yes
Light source type(s): UVA Black Lamps
Supplemental information:
Additional Notes: