Development of a Kinetic Model to Evaluate Water Storage on Commercial Cu-Zeolite SCR Catalysts during Cold Start Cummins Incorporated

Format:

Conference/Event

Author/Creator:

Srinivasan, Srinivasan, author.

Contributor:

Currier, Neal

Joshi, Saurabh

Tang, Yadan

Wang, Di

Yezerets, Aleksey

Conference Name:

WCX 17: SAE World Congress Experience (2017-04-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2017

Summary:

AbstractCommercial Cu-Zeolite SCR catalyst can store and subsequently release significant amount of H2O. The process is accompanied by large heat effects. It is critical to model this phenomenon to design aftertreatment systems and to provide robust tuning strategies to meet cold start emissions and low temperature operation. The complex reaction mechanism of water adsorption and desorption over a Cu-exchanged SAPO-34 catalyst at low temperature was studied through steady state and transient experiments. Steady state isotherms were generated using a gravimetric method and then utilized to predict water storage interactions with respect to feed concentration and catalyst temperature. Transient temperature programmed desorption (TPD) experiments provided the kinetic information required to develop a global kinetic model from the experimental data. The model captures fundamental characteristics of water adsorption and desorption accompanied by the heat effects. Steady state test cell and transient truck data were used as a part of the water storage model verification and validation. The kinetic model predicts water storage well, aiding in system evaluation of level control to understand its impact on cold start emissions

Notes:

Vendor supplied data

Publisher Number:

2017-01-0968

Access Restriction:

Restricted for use by site license