Embed Size (px)
Citation preview
Behaviour of ZnO nanoparticles during high temperature treatment: on-line, size-resolved elemental analysis
Contact: Debora Foppiano - [email protected] ETH Conference on Combustion Generated Nanoparticles
th thJune 13 - June 16 , 2016, ETH Zürich, Switzerland
Ÿ RDD: adjustable and high dilution ratio and well-defined flows of the aerosol
Ÿ SMPS: online analysis of size distribution and concentration of particles
Ÿ ICP-MS: online elemental analysis (chemical composition)
Ÿ Thermal treatment of ZnO nanopowder in a tubular furnace
General Energy Research Department
Paul Scherrer Institut5232 Villigen PSI, Switzerland
Bioenergy and Catalysis Laboratory - Chemical Processes and Materials
a,b a a a a,bD. Foppiano , M. Tarik , A. Hess , E. Müller , C. Ludwiga Paul Scherrer Institut (PSI), Switzerland
b École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
Measuring Arrangement : RDD-SMPS-ICP-MS
Experimental Data
DMA
CPC
RDDcpl
Qpoly
QC
PC
ICP-MS
Qmono,tot Qmono,CPC
Qm
on
o,IC
P
Air
to Vent
to Vent
Ar
Qraw,out
Qd
il A
r
Qair,CPC
QE
xcess
QS
he
ath
Excess air,CPC
Sheath
dil Ar
mass flow controller
aerosol neutralizer
particle filter
pump
XYZ
Qraw,inAr + H2
FURNACE
Conclusion
MotivationŸ Fate of metal nanoparticles in incinerator plants: heavy metals may volatilize and re-form as incidental
nanoparticles after filtration of the flue gas
Ÿ ZnO nanoparticles used in paints and waterproofing agents (used as wood preservatives)Ÿ
Ÿ Detection of Zn containing nanoparticles during high temperature treatment in reducing atmospheres
Ÿ Preliminary results for wood combustion: reducing conditions can influence the release of nanoparticles containing redox-sensitive elements, such as Zn
200 nm
ZnO
KeV
Zn
KeV
SMPS-ICP-MS SEM and XRD analysis on ZnO powder
SEM and EDX analysis (after thermal treatment)
Hexagonal crystalline structure
200 nm
Nearly spherical morphology
Analysis on remaining powder, after thermal treatment
Flower-liketype morphology
Lamellartype morphology
ZnO nanoparticles detection with SMPS-ICP-MS in the range of 50 - 290 nm
Acknowledgements Financial support was obtained from the Competence Center for Materials Science and Technology (CCMX, Project NanoAir) , the Swiss National Science Foundation (Projects 139136 and 136890), the Swiss Nanoscience Institute (Argovia, Project NanoFil), and the Swiss Competence Center for Energy Research – Biomass for Swiss Energy Future (SCCER BIOSWEET) in cooperation with the Commission for Technology and Innovation CTI.
