Characterization of the Automotive Exhaust Gas Aftertreatment Catalysts with Flow Chemisorption Methods Conference attendances
Language | Английский | ||||
---|---|---|---|---|---|
Participant type | Стендовый | ||||
Conference |
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015 , Казань |
||||
Authors |
|
||||
Affiliations |
|
Abstract:
Applications of the chemisorption methods (pulse chemisorption, Temperature-programmed desorption (TPD), reduction (TPR) and oxidation (TPO)) to characterization of the thermal aging of the automotive exhaust catalysts, was described. Pulse chemisorption and TPR were applied to study deactivation of the LNT catalyst. Relatively safe rich operation temperature for LNT was found to be ca. 800°C. Above this temperature, rapid irreversible deactivation due to PGM and support sintering were taking place. For evaluated NH3 SCR catalyst, ammonia TPD study helped to determine not-to-exceed temperature of ca. 900°C. Above this temperature, there is a high probability that zeolite will undergo destruction, so all NH3 SCR reaction related properties will be irreversibly lost.
For the sample of the in-field failed three-way catalyst, temperature of the exposure was deducted based on the characterization of the catalyst with CO pulse chemisorption and TPR.
Cite:
Carberry B.P.
, Schneider M.
, Ukropec R.
, Boerensen C.
, Dubkov A.A.
Characterization of the Automotive Exhaust Gas Aftertreatment Catalysts with Flow Chemisorption Methods
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015
Characterization of the Automotive Exhaust Gas Aftertreatment Catalysts with Flow Chemisorption Methods
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015