TTQXBGnQRMJolWG4769.pptx_20250916_112850_0000.pdf

Presentation of seminar

1. POLLUTION REDUCTION USING ADBLUE TECHNOLOGY
1Submitted by
Fredy Wilfred
S5 MECH D E P A R T M E N T O F M E C H A N I C A L E N G I N E E R I N G Guided By:
Nighil Chandhra

2. The Cause: Emissions & Pollution
Diesel engines offer the possibility of combining very high thermal
efficiencies with very low emissions, and their good fuel efficiency
results in low carbon dioxide emissions. The main problem areas for
diesel engines are emissions of nitrogen oxides (NOx) and
particulates, and these two pollutants are traded against each other in
many aspects of engine design.
Pollutants
BS 3 BS 4 BS 6
Nitrogen oxides (NOx)
5.0 3.5 2.0
Carbon monoxide (CO) 2.0 1.5 1.5
Unburned hydrocarbons (HC) 0.66 0.46 0.46
Particulate matter (PM) 1 0.02 0.02
Fig 1: Diesel Vehicle
Emission
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3. Introducing AdBlue
AdBlue liquid is non-toxic, odorless, colorless and
non- flammable liquid. The AdBlue liquid is stored
in a motorize independent tank because AdBlue fluid
and fuel do not mix.
AdBlue is a diesel exhaust fluid used in vehicles with
Selective Catalytic Reduction (SCR) technology to
reduce harmful gases being released into the
atmosphere. AdBlue is a 32,5 % solution of high-
purity, synthetically manufactured urea in de-
mineralized water. It is a safe-to-use fluid. AdBlue
converts harmful NOx from our diesel vehicle
exhaust into harmless nitrogen
and steam, therefore considerably reducing the
emissions of nitrogen oxides (NOx) that are a major
source of atmospheric pollution and that lead to
smog in urban centers.
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4. The AdBlue Phenomenon
i.The exhaust gases containing Nox is been passed from a
passage leading to SCR.
ii.On the way to SCR, the AdBlue solution is being injected
on the exhaust gases, where it mixes with Nox and forms
carbon dioxide along with nitrogen dioxide.
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III. The resultant product in then
introduced to SCR where final reaction
takes place in the presence of ammonia
where nitrogen and water droplets are
released as the final product.
Fig 2: Basic AdBlue
phenomenon

5. Selective Catalytic Reduction (SCR) Technology
When AdBlue is injected into the hot exhaust
gas, the SCR system decomposes it into
ammonia, which then reacts with the surface
of catalyst to produce nitrogen and water
vapor.
Ammonia (NH3) is used as a reducing agent;
however, due to its aggressiveness and
toxicity, it is not applied as such, but in the
form of an innocuous substance, which
releases NH3 in the exhaust gas stream, the
engine can be operated under optimal
conditions
In the actual selective reduction, NH3
reacts with the NO/NO2 mixture to form
nitrogen and water (steam), which with 80
% constitutes the main natural component
of the atmosphere.
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6. Reactions in Automobile after injecting AdBlue.
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a.Partial Oxidation:
i.2 NO + O2 → 2 NO2
ii.2 CO + O2 → 2 CO2
iii.4 HC + 3O2 → 2 CO2+ 2H2O
b.AdBlue Reaction:
i.(NH2)2CO + H2O → 2 NH2 + CO2
c.Selective Catalytic Reduction:
i.6NO2 + 8 NH3 → 7N2 + 12 H2O
ii.4 NO + O2 + 4 NH3 → 4 N2 + 6 H2O
iii.NO + NO2 + 2NH3 → 2N2 + 3H2O

7. Complete AdBlue Phenomenon
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8. Applications of AdBlue
Commercial Vehicles
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Agriculture Machinery
Construction Machinery
Passenger Cars
Marine
Rails

9. Advantages of AdBlue Technology
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10. Disadvantages of AdBlue Technology
System adds weight
Adequate urea supply infrastructure not yet in place
Purchasing urea is additional cost
System, including sensors and other compliance-related devices, must be
maintained
Most effective at constant speeds and high loads; least in stop/start
Urea (also in some fertilizers) is a water pollutant/harmful to fish
The SCR-technology costs are negatively influenced by the AdBlue tank
and dosing system.
The SCR-technology requires replenishment of AdBlue at regular
intervals.
The low freezing point of urea needs adequate measures for winter
functioning.
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11. Conclusion
Will I need AdBlue in the future? Yes, you probably will. Based on the current developments in
engine technology, if you run a diesel engine you will still need NOx reducing fluids in the future.
Emission legislation for transportation and off-road vehicles will become more demanding. Euro 6
will require the use of SCR technology and AdBlue for all transportation vehicles and passenger
cars. So it is likely that you will require AdBlue in the future. 2014 has also changed the diesel
technology in passenger cars. SCR and AdBlue has become a standard feature for some top model
diesel driven cars.
Due to its excellent solubility in water (1,080 g/l) urea will tend to stay in the aqueous phase in an oil
separator, and from there it will get into the public sewage system and eventually into the public
waste water treatment plants. There it will be completely catabolized within a few days. However, the
question of permits for release of urea solutions into the public sewage systems still needs to be
investigated. As SCR is a chemical process, the exhaust gas can smell different to a conventional
diesel vehicle. In addition, some “white smoke” might be seen from the exhaust pipe when the engine
is started, this is only water vapor. Do not touch this vapor as it may be slightly acidic. If it makes
contact with skin, or clothes, flush the area well with water.
As a fleet owner you will also need AdBlue for your replacement vehicles. Since 2006, most newly
built trucks and buses are
fitted with an SCR system that uses AdBlue. Putting new trucks into use will automatically require
you to familiarize yourself with AdBlue. Current developments also point towards an increase in the
use of catalytic reduction in off-road vehicles. Stage I to IV demand cleaner off-road vehicles with
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12. References
International Journal of Environmental Sciences- Volume 2, No 2, 201, AdBlue: An
Overview Yadav Indrajit N. Dept. of Chemical Engineering, Bharati Vidyapeeth Deemed
University, Pune, (MS) India
https://www.yara.in/chemical-and-environmental-solutions/adblue-for-vehicles/
https://www.yara.com/chemical-and-environmental-solutions/adblue/
https://www.greenoxsolution.co.uk/AdBlue%C2%AE/Applications.aspx
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Thank You.