optimization of urea scr denox systems for hd diesel engines · 2007-04-27 · 7hpshudwxuh dqg...
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![Page 1: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/1.jpg)
2004-01-0154
Optimization of Urea SCR deNOx Systems forHD Diesel Engines
Rinie van Helden, Ruud Verbeek and Frank Willems
Reinier van der Welle
ABSTRACT
•••
INTRODUCTION
![Page 2: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/2.jpg)
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CATALYST CONFIGURATION AND UREADOSAGE CONTROL
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![Page 3: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/3.jpg)
NO
x (%
)
NO
x C
on
vers
ion
[%
]
tem
per
atu
re f
req
uen
cy
Catalyst temperature [°C]
![Page 4: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/4.jpg)
UREA HYDROLYSIS AND MIXING
![Page 5: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/5.jpg)
••
camera
glasstubeglass
window
![Page 6: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/6.jpg)
Inletchamber
Inlet pipe
SCR catalyst
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SCR SYSTEM MODELLING
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•
•
![Page 8: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/8.jpg)
![Page 9: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/9.jpg)
DISCUSSION
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•
![Page 10: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/10.jpg)
Design of system layout Control of urea dosage
CONCLUSIONS
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REFERENCES
![Page 11: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/11.jpg)
ACKNOWLEDGMENTS
APPENDIX
- Solid phase
NOdaNH rrrt
−−=∂
∂3
θ
- Gas phase
)(33
daNHNH
rrx
Cv
t
C−Ω−
∂∂
−=∂
∂
NONONO rx
Cv
t
CΩ−
∂∂
−=∂
∂
![Page 12: Optimization of Urea SCR deNOx Systems for HD Diesel Engines · 2007-04-27 · 7hpshudwxuh dqg kxplglw\ duh frpshqvdwlqj hdfk rwkhu wr d fhuwdlq h[whqw ,q d frog folpdwh iru h[dpsoh](https://reader035.vdocuments.us/reader035/viewer/2022062915/5e96622269e761333e0623e6/html5/thumbnails/12.jpg)
Ωv
)1(33
0NHNHaa Ckr θ−=
3
30 )1(
0NH
RT
E
dds
NHd
ekr θαθ−−
=
*θ
−=−−
*3
3
31*0 NH
NH
s
NO
eCekr NHNORT
E
NONO
θ
θ
θ
)(,, sgsgsgg
gpggg
gpgg TTahx
Tcv
t
Tc −−
∂∂
−=∂
∂↔↔ρερε
rNOasasas
sgsgsgs
sgs
spsg
HrTTah
TTahx
T
t
Tc
∆Ω+−−
−+∂∂
−=∂
∂−
↔↔
↔↔
)(
)()1()1(2
2
, λερε
2
Re
32v
dx
pg
h
ρ⋅
=∂∂
α
Ω
µ
3NHθ
*3NHθ
ρ
ε
∆ Hr
λ
a
C
cp
dh
E
0ak
0dk
0NOk
p
R
Re
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T
v
x