NEXT GENERATION SCR SYSTEM  THE TwintecBaumot B-NOx SYSTEM 

TwintecBaumot B-NOx SYSTEM OVERVIEW

8

3 CAN (dosing rate)

ECU

urea dosing system

ACU

AdBlue® (DEF) injection

high current relay

Battery

partial flow

engine data

10

6 pre turbo out

1 Turbo Charged Diesel Engine

4

2

ammonia injection SCR

DOC

on DPF

engine out

SCR + AOC

tailpipe out

9

Mixer

5

Turbo Diesel engine 1, Exhaust System with PM-

9

AdBlue® (DEF) Dosing

and NOx reduction 2, Ammonia (NH3) Generator 4 and Mixing Unit 5. DEF (Urea Solution) is injected via Urea Dosing System 3 into Ammonia Generator 4. NH3 is generated inside and injected into Exhaust Mixing Unit 5. The generator uses the heat sources from pre turbo exhaust gas 6 and electrically heated catalyst 7

Pre Turbo Exhaust

7

Partial flow is defined by tube diameter 6. Injection control by ACU 8, Urea Dosing System 3, Temperature- 10 and NOx Sensors 9.

NH3 to Exhaust

CHALLENGES FOR THE AMMONIA FORMATION IN THE EXHAUST GAS WITH DIRECT DEF (ADBLUE®) DOSING • Exhaust gas: variance of mass flow, exhaust temperature and pressure • Temperature/hydrolysis: temperatures below 250° C, hydrolysis/evaporation path e.g. 700 mm • Spray/atomization: angle, droplet distribution and size, wall contact • Operational reliability: formation of deposits, nozzle clogging

TECHNICAL SOLUTION TO IMPROVE THE OVERALL DeNOx-PERFORMANCE OF THE SCR SYSTEM Reactor Concept electrical heating cold start heat up

Exhaust heat (partial flow)

dosing+spray

catalyst

AdBlue® direct dosing

NH3 direct dosing

Space velocity [1/h)

Temperature (°C)

NOx Conversion x100 (%)

Temperature (°C)

NH3 gas

NOx Conversion x100 (%)

(DEF) AdBlue®

Space velocity [1/h) Uniformity Measurement after Mixer

• NOx conversion with NH3 Generator (right) very high in wide operation range including low temperatures and by far superior to direct DEF (AdBlue®) dosing (left) • Uniform mixture of NH3 in Exhaust gas • Ammonia gas dosing into main exhaust line • Higher mixing efficiency due to gas - gas mixing • Applicable for close coupled DeNOx • Only 100 seconds until dosing readiness

Uniformity Index 0,98 with l/d-ratio = 0,25

ADVANTAGES AND PERFORMANCE OF THE B-NOx AMMONIA GENERATOR • Highly efficient DeNOx performance, even at cold start conditions • Independent of load level (mass flow, exhaust temperature and pressure) • Optimized packaging of exhaust line, no hydrolysis- and evaporation path • Applicable for close coupled DeNOx • Mixing length < 250 mm from ammonia gas inlet to main SCR catalyst • No deposit on catalysts and exhaust line from operating material and/or decomposition, intermediates • SCR on DPF with less risk of failure due to deposits • Less catalyst volume and lenght by SCRF • High DeNOx efficiency of zone coated SCR

- Zone A: SCR coating for high temperature sensitivity



- Zone B: SCR coating for low temperature sensitivity

Pressure (mbar)

NOx - REDUCTION ON A SCHOOL BUS DURING SERVICE MORNING COLD START UP TO 80% NOx REDUCTION AT COLD START TEMPERATURES ( >150 °C EXHAUST)

NOx concentration (ppm)

cumulative NOx (mol)

Temperature

cold start phase

NOx reduction rate performed on test cycles with TDI-engines from 6L to 11L

93%

School Bus real drive, Morning start 85%

ISO 8178 C1 (NRSC)*

89%

ISO 8178 C1 (NRSC)*

*

87%

NRTC (hot)*

*

90%

NRTC (hot)* ETC

*

91% 92%

WHTC (hot)

…

60%

*DIFFERENT SYSTEM CONFIGURATIONS

84%

WHTC combined

0

The tests demonstrate the exceptional DeNOx-performance in a wide range of first fit and retrofit applications

94%

Milbrook Test Cycle

70%

80%

NOx - Reduction Rate

90%

100%

DIMENSIONS AND FEATURES OF TwintecBaumot B-NOx AMMONIA GENERATOR

AMMONIA GENERATOR CLASSIFICATION length Section 3 Hydrolysis Catalyst Connection Ammonia Outlet

Section 2 Heating Catalyst

diameter

Connection AdBlue® Injector

Section 1 Evaporation of H2O from DEF

Inlet Pre-Turbo Exhaust

Typ

reduction capacity for

max. AdBlue®/DEF dosing ml

DEF/h

g

DEF/h

gal

DEF/h

Electric connector heater

NOx (a=1)

ml

DEF/h

g

Sensor Boss/ Temperature

Length

Diameter

Volume

Weight

NO/h

mm (in)

mm (in)

l (in)

kg (lb)

l

505

550

0.13

1.2

179

230 (9.06)



77 (3.03)

1.05 (0.28)

1.80 (4.00)

ll

2752

3000

0.73

6.6

975

430 (16.93)

105 (4.13)

3.50 (0.92)

3.00 (6.62)

lll

8257

9000

2.18

19.8

2925

500 (19.69)

150 (5.91)

8.90 (2.35)

5.10 (11.25)

lV

16514

18000

4.36

39.7

5850

500 (19.69)

150 (5.91)

17.80 (4.70)

10.20 (22.49)

*

Typ

El. Power

Voltage

Typ. Application

Watt

Volt

l

1.000

12

Pass. Car or LDV

ll

1.000

12,24

lll

2.000

lV*

4.000

Power

Emission Compliance

kW

example

2L TDI

90

EU 6

Bus MD/NRMM

6L TDI/7L TDI

175/150

EU 3 - EU 6/Stage IV, TIER 4F

24

Truck MD

11L TDI

240

EU 5w/o EGR

24

NRMM, Industrial

16L TDI

560

values may change during development progress * Two systems of size III are installed in parallel

Engine

TwintecBaumot - YOUR COMPETENT PARTNER FOR SPECIALIZED EXHAUST AFTERTREATMENT PRODUCTS

USA BAUMOT NORTH AMERICA, LLC

2000 Town Center | Suite 1900 Southfield | MI 48075 F. +1(248) 979 8037 www.baumot.us | [email protected]

GERMANY

SWITZERLAND

TWINTEC GmbH

BAUMOT AG

Eduard-Rhein-Strasse 21-23 53639 Koenigswinter P. +49(0)2244 . 91 80 40 F. +49(0)2244 . 91 83 70 www.twintec.de | [email protected]

Thurgauer Strasse 105 8152 Glattpark P. +41(0)44 . 954 80 70 F. +41(0)44 . 954 34 36 www.baumot.ch | [email protected]

TwintecBaumot is a leading supplier of environmentally friendly products and technologies for reducing exhaust emissions.