wltp-dtp subgroup additional pollutants progress report

WLTP-DTP Subgroup Additional PollutantsProgress Report April 2012

WLTP-DTP-AP, Mörsch/Astorga

WLTP-DTP Subgroup Additional Pollutants

Progress report

Date: 17. Apr. 2012


2Additional pollutants:Request for Parameters’ list

1

2

3Other APIn VP2

Parameters’ list For NO2


Meeting schedule

First Meeting: Telephone/Web Conference 20th July 2010 16 participants

2nd Meeting: Telephone/Web Conference 20th July 2010 20 participants

3rd Meeting: Face to face meeting at JRC/Ispra 9/10 Dec. 2010 14 participants

4th Meeting: Face to face meeting at BMW/Munich 7/8 March 2011 18 participants

5th Meeting: Face to face meeting at JRC/Ispra 10/11 Mai 2011 16 participants

6th Meeting: Telephone/Web Conference 09th Dec. 2012 16 participants



2Additional pollutants:Request for Parameters’ list

1

2

3Other APIn VP2

Parameters’ list For NO2


Issue was discussed within group:Agreed that only NO2 should be required

from all labs in VP2

Reasons:most labs do not have instrumentation or instrumentation is not available for other APs

reference fuel E5 measurement of EtOH and Aldehydes not meaningful

Request to prepare parameter list for further additional pollutants



The AP sub-group wanted to encourage all labs to deliver as

many compounds of the additional pollutants list as they can

&

the results will be analyzed during validation phase 2.


Additional pollutantsRequest forParameters’ list

1

2

3Other APIn VP2

2Parameters’ list For NO2


After discussion of pros and cons it was decided to retain the possibility of bag measurement of NO for VP2.

All participating labs should measure both ways (bag and dilute modal).

Parameter list has been amended (Version03)

NO measurement from Bag




1 Sampling

1.1 sample point from diluted exhaust bag all Labs should measure continous modal and bag

sampling continuous dilute modal

bag all Labs should measure continous modal and bag

2 Analysis

2.1 Analyzer CLD in NO-mode UV-RAS, QLC in NO-mode

UV-RAS, QLC in NO2-mode UV-RAS and QLC allow direct measurement of NO2

3 Calculation

3.1 density of NO 2.050 g/m³ @ 273.2 K and 101.33 kPa

3.2 density of NO2 2.050 g/m³ @ 273.2 K and 101.33 kPa

3.3 density of NOx 2.050 g/m³ @ 273.2 K and 101.33 kPa

4 Calibration

4.1 Calgas NO in N2 NO2 in N2, if direct measurement of NO2

Remarks# Item Set Point Variations

Parameter List for NO2 measurements

(AP) Version 03



NO-measurement

All participating labs should measure both ways (bag and dilute modal).

-All measurements: - Absolute difference between dilute and modal measurement

-Repeat tests: - Variability of NO result compared to NOx-measurement- Variability of NO result from bag measurement versus dilute modal

Qualitative assessment parameters for validation phase 2


2Additional pollutantsRequest forParameters’ list

1

2

3

Parameters’ list for NO2

Other APIn VP2


Labs may use existing equipment for NH3 or N2O

Report setup/analyzers used and experiments quite in detail

Further decision will be based on results of VP2


WLTP-DTP-AP, Mörsch-Astorga

Table of candidate methods for additional pollutants

Pollutant Method bag

dilu

ted

raw

onlin

e

off l

ine

LoD[ppm]

LoQ[ppm]

rise time [s]

inter-ference Base

Robustness ofmeasurement Paper Nr.

NO2 CLD differential x x ECE Reg. 83/EPA 1065.272 very good WLTP-DTP-02-06eNDUV-RAS differential x x ECE Reg. 83/EPA 1065.272 good WLTP-DTP-02-06eQCL x x not yet available WLTP-DTP-AP-02-02FTIR x x fair

N2O GC-ECD x x EPA 1065.275 good WLTP-AP-02-01 bNDIR x x EPA 1065.275 poor WLTP-AP-02-01 bQCL x x not yet available WLTP-DTP-AP-02-02FTIR x x EPA 1065.275 poorring down cavity x x ?Photo Acoustic x x EPA 1065.275 poor

NH3 LDS (in situ) x x Commitology EUVI fair WLTP-DTP-02-07e(SCR systems) LDS (extractive) x x Commitology EUVI fair

FTIR x x Commitology EUVI fair WLTP-DTP-02-07eQCL x x not yet available WLTP-DTP-AP-02-02

Ethanol Impinger + GC-FID x xCARB NMOG Part C METHOD 1001EPA 1065.805 good

(E85) Photo Acoustic x x MSO 2000-08 goodQCL not yet availableFTIR ?

Aldehydes Impinger/Cartridge + HPLC x x CARB NMOG Part F METHOD 1004 good WLTP-DTP-AP-02-06(E85) FTIR x x poor

QCL ? x not yet available

reference methods General: EPA 1065.205

LoD determined by use of traceable cal. gases

WLTP-DTP-AP-05-01



N2O-measurement

Use of two (or more) different systems in parallel (e.g. QCL, GC-ECD, FTIR,…)

Cal Gas: 5 ppm of N2O in N2 (+/- 2%)

-All measurements: - repeatability of air bag measurement- difference in result of the two systems- stability of calibration (apply cal gas before and after test)

-Repeat tests: - Variability of N2O result




NH3-measurement

NH3 only for Diesel with SCR

take care of extracted sample measurement of two systems in parallel (e.g. QCL and FTIR…) use of different sampling systems

one with smallest possible Volume, shortest possible line length one with larger Volume and line length where available, use in situ system in parallel

-All measurements:- compare average concentration result - Compare traces of the systems

- incidence of first peak - rise time- drag

-Repeat tests: - Variability of NH3 result




Request to OICA to include one FFV (one lab)

Request to suppliers to make available online systems for EtOH

All systems measure in parallel

NMOG

Online systems for Aldehydes are under development but not yet available

Request to include EtOH


TABLE OF CANDIDATE METHODS FOR ADDITIONAL POLLUTANTS


WLTP-DTP-AP, Mörsch-Astorga

Table of candidate methods for additional pollutants

Pollutant Method bag

dilu

ted

raw

onlin

e

off l

ine

LoD[ppm]

LoQ[ppm]

rise time [s]

inter-ference Base

Robustness ofmeasurement Paper Nr.

NO2 CLD differential x x ECE Reg. 83/EPA 1065.272 very good WLTP-DTP-02-06eNDUV-RAS differential x x ECE Reg. 83/EPA 1065.272 good WLTP-DTP-02-06eQCL x x not yet available WLTP-DTP-AP-02-02FTIR x x fair

N2O GC-ECD x x EPA 1065.275 good WLTP-AP-02-01 bNDIR x x EPA 1065.275 poor WLTP-AP-02-01 bQCL x x not yet available WLTP-DTP-AP-02-02FTIR x x EPA 1065.275 poorring down cavity x x ?Photo Acoustic x x EPA 1065.275 poor

NH3 LDS (in situ) x x Commitology EUVI fair WLTP-DTP-02-07e(SCR systems) LDS (extractive) x x Commitology EUVI fair

FTIR x x Commitology EUVI fair WLTP-DTP-02-07eQCL x x not yet available WLTP-DTP-AP-02-02

Ethanol Impinger + GC-FID x xCARB NMOG Part C METHOD 1001EPA 1065.805 good

(E85) Photo Acoustic x x MSO 2000-08 goodQCL not yet availableFTIR ?

Aldehydes Impinger/Cartridge + HPLC x x CARB NMOG Part F METHOD 1004 good WLTP-DTP-AP-02-06(E85) FTIR x x poor

QCL ? x not yet available

reference methods General: EPA 1065.205

LoD determined by use of traceable cal. gases

WLTP-DTP-AP-05-01


Drafting of GTR for reference methods [*]

NO2 and NH3 based on OICA proposals

N2O, Ethanol and Aldehydes based on existing legislation

Gathering of performance data for candidate methods

Tasks have been assigned within group and will be performed until next meeting

[*] Draft GTR proposal: WLTP-DTP-LabProcICE-112 (…)

AP-Work on-going

astorca

WHAT'S COMING NOW...

astorca

OICA, The International Organization of Motor Vehicle Manufacturers was founded in Paris in 1919. It is known as the Organisation Internationale des Constructeurs d AUTOMOBoica.net -


NH3 sampling during engine off

Temperature for NH3 sampling (110 – 190?C)

proposal: set point between 110 C and 190 C with range of +/- 10 K

JAMA position: between 110 and 133 due to decomposition of urea

Open Issues


Traceability to national standards of cal gas for AP

DTP gas industry difficulties for NH3, EtOH to be expected,

achievable accuracy/stability has to be established


Open Issues (2)


Ref.: CIRCA documents WLTP-DTP-AP

Draft GTR proposal: WLTP-DTP-LabProcICE-101

THANKS FOR YOUR ATTENCIONC. Astorga

[email protected]://ies.jrc.cec.eu.int

& open questions: WLTP-DTP-AP-07-02 Open Issues

mailto:[email protected]


agree on performance criteria

– LoD– cross interference– …– (A table of candidate methods to be evaluated has been set up)

allow alternative methods (and factors)

based on existing legislation where suitable

avoid raw measurement where possible

General guidelines


Definitions for THC, NMHC and NMOG have been agreed

(Alignment with ICE lab group is needed)

THC: total Hydrocarbons (All compounds measurable by FID)

NMHC: Non-methane hydrocarbons (THC excluding CH4 and ROH, response factors are applied)

NMOG: Non-methane organic gases (NMHC plus ROH and RHO)

wltp-dtp subgroup additional pollutants progress report

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