THE TwintecBaumot B-NOx SYSTEM NEXT GENERATION SCR SYSTEM

Turbo Diesel engine 1, Exhaust System with PM-

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

Partial flow is defined by tube diameter 6.

Injection control by ACU 8,

Urea Dosing System 3,

Temperature- 10 and NOx Sensors 9.

TwintecBaumot B-NOx SYSTEM OVERVIEW

AdBlue® (DEF) Dosing

Pre Turbo Exhaust

NH3 to Exhaust

7

ECU

Battery

CAN (dosing rate)

AdBlue® (DEF) injection

partial flow

ammonia injection

engine out

pre turbo out

enginedata

1 2

8 3

4

9

6

59

Turbo

ChargedDieselEngine

DOC SCRon DPF

Mixer

SCR+ AOC

tailpipe out

10

high currentrelay

urea dosingsystemACU

• 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

CHALLENGES FOR THE AMMONIA FORMATION IN THE EXHAUST GAS WITH DIRECT DEF (ADBLUE®) DOSING

• 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

TECHNICAL SOLUTION TO IMPROVE THE OVERALL DeNOx-PERFORMANCE OF THE SCR SYSTEM

(DEF) AdBlue®

Exhaust heat (partial flow)

electricalheating

cold startheat up

dosing+spray

AdBlue® direct dosing

Space velocity [1/h) Space velocity [1/h)

Uniformity Measurement after Mixer

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

NH3 direct dosing

catalyst NH3 gas

Tem

pera

ture

(°C)

Reactor Concept

Tem

pera

ture

(°C)

NOx

Con

vers

ion

x100 (%

)

NOx

Con

vers

ion

x100 (%

)

• 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

ADVANTAGES AND PERFORMANCE OF THE B-NOx AMMONIA GENERATOR

Tem

pera

ture

Pre

ssur

e (m

bar)

NO

x co

ncen

trat

ion

(ppm

)

cum

ulat

ive

NO

x (m

ol)

coldstartphase

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

*DIFFERENT SYSTEMCONFIGURATIONS

The testsdemonstrate

the exceptionalDeNOx-performance

in a wide range of first fit and retrofit applications

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

NOx - Reduction Rate

ISO 8178 C1 (NRSC)*

* ISO 8178 C1 (NRSC)*

*

*

94%

84%

Milbrook T est Cycle

School Bus real drive, Morning star t

NRTC (hot)*

NRTC (hot)*

ETC

WHTC combined

WHTC (hot)

93%

85%

89%

87%

90%

%19

92%

0 … 60% 70% 80% 90% 100%

DIMENSIONS AND FEATURES OF TwintecBaumotB-NOx AMMONIA GENERATOR

AMMONIA GENERATOR CLASSIFICATION

length

diam

eter

Con

nect

ion

AdB

lue®

Inj

ecto

r

Section 1Evaporation of H2O from DEF

Inlet Pre-Turbo Exhaust

Electric connector heater

Sensor Boss/ Temperature

Section 2 Heating Catalyst

Section 3 Hydrolysis Catalyst

Con

nect

ion

Am

mon

ia O

utle

t

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

Typ max. AdBlue®/DEF dosingreduction capacity for NOx (a=1) Length Diameter Volume Weight

mlDEF/h gDEF/h galDEF/h mlDEF/h gNO/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 Engine Power Emission Compliance

Watt Volt kW example

l 1.000 12 Pass. Car or LDV 2L TDI 90 EU 6

ll 1.000 12,24 Bus MD/NRMM 6L TDI/7L TDI 175/150 EU 3 - EU 6/Stage IV, TIER 4F

lll 2.000 24 Truck MD 11L TDI 240 EU 5w/o EGR

lV* 4.000 24 NRMM, Industrial 16L TDI 560

TwintecBaumot - YOUR COMPETENT PARTNER FOR SPECIALIZED EXHAUST AFTERTREATMENT PRODUCTS

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

USA

BAUMOT NORTH AMERICA, LLC2000 Town Center | Suite 1900Southfield | MI 48075F. +1(248) 979 8037www.baumot.us | info@baumot.us

GERMANY

TWINTEC GmbHEduard-Rhein-Strasse 21-23 53639 KoenigswinterP. +49(0)2244 . 91 80 40F. +49(0)2244 . 91 83 70www.twintec.de | mail@twintec.de

SWITZERLAND

BAUMOT AGThurgauer Strasse 105 8152 GlattparkP. +41(0)44 . 954 80 70F. +41(0)44 . 954 34 36www.baumot.ch | info@baumot.ch