Testing of DENOX Catalysts

The introduction of more stringent emission regulations is continuously increasing the requirements for highly efficient and robust NOx aftertreatment systems. Two different catalytic technologies are available for controlling NOx emissions:

NOx trapping followed by regeneration using a lean NOx trap (LNT)

Selective reduction of NOx (SCR) using ammonia-based reductants


Our Solutions

hte has established high throughput synthesis workflows and test systems for developing and evaluating DeNOx catalysts:

Primary screening: Powder processes
  • Parallelized workflows for catalyst preparation and ageing
  • 48-fold high throughput test technology
Secondary screening: Scale-up
  • Washcoat processing and coating equipment for scale-up from powder catalysts to coated monoliths
  • Fully automated 6-fold core test unit for evaluation of monolith SCR catalysts
  • Fully digitalized testing workflow enabling efficient data management from data acquisition to reporting

YOUR BENEFITS

  • Development and scale-up of new catalyst formulations from a single source
  • Black-box testing* of new formulations or benchmark studies under industrially relevant conditions
  • Cost and time savings compared to engine, bench or vehicle testing
  • Industrially relevant data with scalability
  • Scientific expertise and data interpretation of up to 8,000 samples per year
    *Customers send us catalysts, the composition of which we do not know. We test these materials and evaluate the results.

R&D USE CASES

  • Material screening and catalyst mapping
  • Independent benchmark testing
  • Quality control of production samples

Testing Process

HT SCREENING

  • 1 mL bed volume
  • 100-300 mg active mass
  • 1-5 g new material needed

CORE TESTING

  • 30-50 mL bed volume
  • 3-10 g active mass
  • 50-200 g new material needed

FINAL VALIDATION

  • > 1000 mL bed volume
  • > 100 g active mass
  • > 500 g new material needed

High Throughput Testing of LNT catalysts

LNT CATALYST PREPARATION AND TESTING

  • High throughput workflows for small-scale slurry preparation of LNT catalysts established, including ageing procedures
  • Parallel testing of LNT catalysts in 48-fold units using validated test protocol with lean/rich feed switches

DATA QUALITY

  • 1 Hz data acquisition and data processing using myhteTM software environment
  • LNT test protocols have been validated at hte and correlated to core tests and engine data

Testing of SCR catalysts

KEY FEATURES

  • Fully automized SCR test unit
  • Carousel catalyst exchanger (6-fold)
  • Flexible use of testing monolith cores or powders
  • Precise dosing and mixing of reactive gases & water
  • Low blank activity to inert coating of reactor system

VALIDATED TEST PROTOCOLS

  • Steady-state test protocols for standard and fast SCR as well as ammonia oxidation
  • SCR-related protocols with feed switches for ammonia storage and customer-specific test protocols, e.g. 4-step test
DeNOx technologies for automotive and stationary applications
Automotive catalysis: SCR, Lean NOx trap, Passive NOx adsorbers
Stationary Processes: DeNOx, N2O abatement
CONTACT US

Dr. Christopher Federsel

Sr. Business Development Manager

T +49 (0) 62 21 74 97 - 332
E Christopher.Federselhte-company.de


PUBLICATION: SCREENING NOX STORAGE PERFORMANCE

Demonstrating a High Throughput Approach for Evaluating Emission Control Catalysts under Transient Conditions