Experiment: NCAR_20170705_nitric oxide/hydrogen peroxide_Hydroxyl radical_No Seed_CSTR_blank_170705

Experiment

Name: NCAR_20170705_nitric oxide/hydrogen peroxide_Hydroxyl radical_No Seed_CSTR_blank_170705
Date: 2017-07-05

Organization
NCAR

Chamber
NCAR 3rd Floor Teflon

Experiment Set
'Intermediate-NO' regime experiments

Goals
Probing the steady state NO and O3 concentration that could be reached by varying the concentrations of reactants H2O2 and NO in the photooxidation experiment

Summary
First, a given amount of H2O2 and NO is continuously injected into the chamber till the steady state is established. Second, the UV lights are on to initiate photochemistry till another steady state is established.

Experiment Details

Categories:

  • Gas phase chemical reaction
  • Blank/Control
Temperature: 35
Relative Humidity: 10
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 10
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 0 (molecules_per_cubic_centimeter)
RO2 Main Fate: No RO2 chemistry
RO2 Lifetime: (Seconds)
Pressure: 0.8 atm

Data Sets

ID Instrument File  
133 O3 monitor O3_170705.csv
134 NO monitor NO_170705.csv

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

Experiment Set Details

Name: 'Intermediate-NO' regime experiments
Time format and units:
Description:
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

Collaborators:

Download

Download this Experiment (83.06 KB)

Contacts

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

Reactants

Reactant Compound type Concentration Concentration units
nitric oxide (145068)
  • NOx
 Parts Per Billion
hydrogen peroxide (784)
  • Hydroperoxide
 Parts Per Billion

Timeline_CSTR_blank_170705.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)

Citations
Cite this experiment: Publication associated with this experiment:

Characterizations
Light Flux Characterizations:
2016-02-18 (#23)
Particle Loss Characterizations:
(None)
Vapor Loss Characterizations:
(None)

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: