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International Sales Meeting 2008. New type of Add-on Monitor for Continuous PAH Nano Particles Surface SOOT by Hans Grimm. International Sales Meeting 2007. AGENDA Motivation Technical Solution Specification Application Examples. International Sales Meeting 2007. - PowerPoint PPT Presentation
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New type of Add-on Monitor forNew type of Add-on Monitor for
Continuous PAH Continuous PAH Nano Particles SurfaceNano Particles Surface
SOOTSOOT
by Hans Grimmby Hans Grimm
International Sales Meeting 2008
AGENDAMotivation
Technical Solution
Specification
Application Examples
International Sales Meeting 2007
Apart from the PM values and the Size Distribution there is a growing interest to get a deeper insight in the composition of dust.
Chemical analysis requires a lot of time, is expensiv and very often complicated.
Therefore sensors are needed to provide fast, reliable and unexpensive data.
International Sales Meeting 2007
What are PAH´s
PAH: Polycyclic Aromatic Hydrocarbons
PAHs are organic molecules consisting of between 2 and 6 Benzene rings.
PAHs are solids at room temperature
Almost all five-ring compounds are particulate bound
Typical PAH´s
Why measure PAH ?
• PAH are known or suspected to be carcinogenic
• Particle bound PAH are attached to small particles
• Obtain additional information about particles in a size below 250 nm
•Sources are
natural: volcanoes and natural fires
Anthropogenic: combustion, vehicle exhaust, cigarette and wood smoke,
New speciation technologies
- Particle bound PAH
- Soot Particle
Measuring Principle
The sample flows continuously into the PAH sensor and through the excimer- lamp ionization region. Here particle-bound PAH molecules are ionized particle-bound PAH molecules are ionized by photoelectric effect and loose an electron.
The charged particles are captured on a filter in an electrometer.
The flow of electrons to neutralize the particles for a current which is corllated to the particle concentration.
Installation in Environcheck #107
Sensor module
#130 PAH sensor installed in #365
#130 PAH sensor attached to #107
PAH-Data
Measurement principle: Photoionisation for detection of particle-bound PAHs
Range: max. 0 to 5000 fA
Substance sensitivity: ~ 1 ng/m3 (to be verified)
Data rate: < 6 s to 2h
Air flow: 1.2 l/min (external)
Pressure range: 1013 ± 100 mbar
User interface: RS-232 / 1-Wire / I2C
Analog output: 0 to 5 V (1 to 4 V = 0 to 500 fA or 0 to 5000 fA)
Dimensions (LWH): 240 x 75 x 75 mm
Weight: 1.8 kg
Power requirements: 18 VDC (nominal), max. 1.2 A (Peak)
# 130 Specifications
PAH Data from Hallein/Austria
Hallein 11.08.04 bis 31.08.04PAH Temp rH
0
50
100
150
200
250
300
350
400
450
PA
H [
fA]
0
10
20
30
40
50
60
70
80
90
100
Te
mp
era
ture
[°C
] -
Hu
mid
ity
[%]-
PM
1 [
µg
/m³]
PAH-Signal [fA] PM-1 Temp.:(°C) Humidity(%rH)
Mi DiMoSoSaFrDo Mi DiMoSoSaFrDo Mi MoSoSaFrDo
PAH Data from Hallein/AustriaHallein 11.08.04 bis 31.08.04
PAH PM2.5 PM1
0
50
100
150
200
250
300
350
400
450
PA
H [
fA]
0
10
20
30
40
50
60
70
PM
1
PM
2.5
[µ
g/m
³]
PAH-Signal [fA] PM-1 PM-2.5
Mi DiMoSoSaFrDo Mi DiMoSoSaFrDo Mi MoSoSaFrDo
The „smoke chamber“:
- A room with ~ 15 m3 filled up with cigarrette smoke during the coffee brake
- Windows opened for continous dilution over the night period
Smoke Application
PAH Smoke Resultsthe "smoke chamber"
0
50
100
150
200
250
22.8.05 13:37
22.8.05 14:49
22.8.05 16:01
22.8.05 17:13
22.8.05 18:25
22.8.05 19:37
22.8.05 20:49
22.8.05 22:01
22.8.05 23:13
23.8.05 0:25
23.8.05 1:37
23.8.05 2:49
23.8.05 4:01
23.8.05 5:13
time
PM
[µ
g/m
^3]
, P
AH
[fA
], M
ean
Dp
[n
m]
1
10
100
1000
10000
100000
1000000
tota
l <
300
nm
/ t
ota
l >
300
nm
[P
/ccm
]
PM 10 / PM 2.5 / PM 1.0
total Ultrafine < 350 nm
total > 300 nm
Pressure
rel.humidity
temperatureDp mean
PAH
New sensors integrated in #365
*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)
The world-wide first PORTABLE nanoparticle detector The world-wide first PORTABLE nanoparticle detector for aerosol exposure monitoring !for aerosol exposure monitoring !
*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)
-total number concentration-total surface area
-mean diameter Dp
-the surface area of particles deposited in the lung*
The world-wide first PORTABLE nanoparticle detector The world-wide first PORTABLE nanoparticle detector for aerosol exposure monitoring !for aerosol exposure monitoring !
NEW-NanoCheck*
electrical, unipolardiffusion charger
conductivity measurement
faraday cupelectrometer
*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)