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Low Temperature Aftertreatment (LTAT) Low Temperature Aftertreatment (LTAT)

Low Temperature Aftertreatment (LTAT) - PowerPoint Presentation

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Low Temperature Aftertreatment (LTAT) - PPT Presentation

Test Protocol Development STEP 1 LowTemperature Oxidation Reactor Description Exhaust Simulation Protocol Execution and Reporting Degreening and Aging ANALYTICAL CO CO 2 total HC NO ID: 615203

pre protocol gdi greening protocol pre greening gdi temperature min exhaust time aging catalyst reactor ltc activity poisoning diesel

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Presentation Transcript

Slide1

Low Temperature Aftertreatment (LTAT)

Test Protocol Development

STEP 1

Low-Temperature Oxidation

Reactor Description

Exhaust Simulation

Protocol Execution and Reporting

De-greening and Aging

ANALYTICAL

- [CO], [CO

2

], total HC, [NO

], [NO2] - [N2O], [NH3], stoich comb. [O2] Frequency of Analysis Sampling every 2°C Rate of Response ≤ 15 seconds

TEMPERATURE MEASUREMENT

REACTOR BASE-LININGEnsure reported data dictated solely by material behaviorOne-time blank run per application to base-line without catalystQuantify recovery of reactive species to ensure fate

- catalyst inlet, within catalyst powder, inserted into core

Core Powder

PRE-TREATMENT

20 min @ 600°C

CDC, LTC-(D/G), L-GDI

Lean [O

2

, H

2O, CO2] S-GDI – Neutral [H2O, CO2]

ACTIVITY TESTING

2°C/min 100 – 500°C 30k GHSV (60k option) Full simulated exhaust

REPORTINGCatalyst Sample DetailsCatalyst dimensions (or amount), compositionCore substrate details (e.g., cell density)Reactor ConfigurationReactor and heating detailsDetails regarding thermocouple location, chemical analysis, sampling techniques, feed composition, GHSVTest ConditionsIntended engine applicationProcedures used for de-greening, aging and/or poisoning, pre-treating & testing (or reference to protocol)Test Results/Performance DataConcentration versus temperatureConversion efficiency, T50/T90 determination

Gasoline

Diesel

CATALYST AGING – 800°C/50 hours

Time, seconds

All catalysts de-greened prior to protocol execution

De-greening

once

per sample; pre-treatment prior to each testAging/poisoning to occur separately from activity testingAged-state unchanged during the course of activity testing

DE-GREENING – 700°C/4 hours Neutral – gasoline [S-GDI, L-GDI, LTC-G] Lean – diesel [CDC, LTC-D]

PRE-TREATMENT20 min @ 600°C

Sulfur Poisoning

POISON – 5 hrs @ 300°CFull Simulated Exhaust + 5 ppm SO2

ACTIVITYTESTING

Time, minutes

Diesel w/LNT – 800°C/10

hrs

The

Advanced Combustion and Emission Control (ACEC)

Technical Team

Low Temperature Aftertreatment (LTAT)

working group

Including representatives from: - FCA, Ford, GM, ORNL, PNNL, & DOE

The Protocol is a document that will be distributed via the CLEERS website upon final approval by USDRIVE leadership