1 / 12

Ecocat catalysts tests synthesis - Presentation contents

Ecocat catalysts tests synthesis - Presentation contents. Catalyst test preparation Test protocols Results of equivalence ratio sensitivity Results of light-off tests Conclusions of the catalyst evaluation phase. Catalyst test preparation. Prototype catalysts to be tested.

lewis-swanson
Download Presentation

Ecocat catalysts tests synthesis - Presentation contents

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ecocat catalysts tests synthesis - Presentation contents • Catalyst test preparation • Test protocols • Results of equivalence ratio sensitivity • Results of light-off tests • Conclusions of the catalyst evaluation phase

  2. Catalyst test preparation Prototype catalysts to be tested Volume = 1.47 L Catalysts were aged with RAH (Rapid Aging Hot) protocol by Ecocat

  3. Ecocat Catalysts tests Testprotocols Variations of equivalence ratio The objective is to determine the best equivalence ratio regarding the conversion trade-off for HC, CO and NOx and the equivalence ratio sensitivity Steady state condition on the 3000 rpm - 7 bar of BMEP with G20 fuel, exhaust flow = 110 kg/h, T inlet catalyst = 500 °C, GHSV = 166 000 h-1 Light-off tests The catalyst is warmed-up from 100 °C to 500 °C on the same operating point 3000 rpm – 7 bar, with the optimal equivalence ratio determined above. Light-off temperatures at different conversion rates were computed for each species

  4. Maximum HC conversion = 55% at 1.003 Max CO conversion = 88% Max NOx conversion = 85% Equivalence ratio sensitivity Catalyst #23207 (120 g/ft3, Pd:Rh = 23:1 ) 1

  5. Equivalence ratio sensitivity Catalyst #23208 120 g/ft3, Pd:Rh = 11:1 Catalyst #23209 200 g/ft3, Pd:Rh = 19:1 2 3 4 5 Catalyst #23211 250 g/ft3, Pd only Catalyst #23210 200 g/ft3, Pd:Rh = 39:1

  6. 1 2 3 4 4 5 1 2 3 4 5 Equivalence ratio sensitivity summary

  7. Equivalence ratio sensitivity summary Conversion efficiency for optimal equivalence ratio 1 2 3 4 5

  8. Light-off tests Catalyst #23207 (120 g/ft3, Pd:Rh = 23:1 )

  9. Light-off tests Catalyst #23208 120 g/ft3, Pd:Rh = 11:1 Catalyst #23209 200 g/ft3, Pd:Rh = 19:1 2 3 4 5 Catalyst #23211 250 g/ft3, Pd only Catalyst #23210 200 g/ft3, Pd:Rh = 39:1

  10. Light-off tests summary HC conversion CO conversion 1 2 3 4 5 NOx conversion

  11. Light-off tests summary Maximum efficiency during light-off tests 1 2 3 4 5

  12. Conclusions of the catalyst evaluation phase Equivalence ratio sensitivity tests In steady state conditions (T inlet catalyst = 500 °C, GHSV = 166 000 h-1), the prototype #23210 (200 g/ft3 ; Pd:Rh = 39:1) presents the largest equivalence ratio range. Maximum HC conversion efficiency is 80% at 1.001 (slightly rich mixture), while maximum CO and NOx conversion efficiency are 90%. Light-off tests In light-off tests conditions, the prototypes #23210 (200 g/ft3 ; Pd:Rh = 39:1) and #23211 (250 g/ft3 ; Pd only) display the lowest light-off temperatures. Regarding the cost difference, the #23210 reference could be selected for the next phases.

More Related