Ammonia dynamic modelling over Cu-SSZ-13 catalyst for NOx emission control in diesel vehicles

Biao Liu, Dongwei Yao, Feng Wu, Xiaohan Hu, Yuxi Li, Xinlei Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Based on in situ DRIFTS studies of ammonia storage mechanism over the Cu-SSZ-13 catalyst, a temperature-dependent heterogeneity constant was introduced in the traditional dual-site model, and was compared with traditional dual-site and multi-site models based on a series of NH3-TPD experiments in this work. The results showed that the modified dual-site model was in better agreement with experimental NH3-TPD measurements than the traditional dual-site model, and even better than the multi-site model at some temperatures. Moreover, the modified dual-site model was validated under transient conditions with different adsorption concentrations, flushing durations and heating rates. The results showed that the model predicted the NH3-TPD process well under these transient conditions. The accuracy was better than that of the traditional dual-site model, and comparable to that of the multi-site model. The modified dual-site model had similar accuracy, but less parameters compared to the multi-site model, and the reduced model complexity is of great significance for the model-based urea injection control of diesel engines. This journal is

Original languageEnglish (US)
Pages (from-to)1824-1832
Number of pages9
JournalReaction Chemistry and Engineering
Volume5
Issue number9
DOIs
StatePublished - Sep 2020

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (miscellaneous)
  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes

Fingerprint Dive into the research topics of 'Ammonia dynamic modelling over Cu-SSZ-13 catalyst for NOx emission control in diesel vehicles'. Together they form a unique fingerprint.

Cite this