NOx Storage and Reduction

Mosqueda-Jimenez, B.I., Lahougue, A., Bazin, P. et al. (2007) Operando systems for the evaluation of the catalytic performance of NOx storage and reduction materials, Catal. 

Abstract The reaction network of the NOx storage and reduction over Pt—Ba/Al203 lean NOt trap catalysts is presented in this paper. 

Anderson, J.A., Bachiller-Baeza, B. and Fernandez-Garcia, M. (2003) Role of Pt in Pt/Ba/Al203 NOx Storage and Reduction Traps, Phys. Chem. Chem. Phys., 5, 4418. 

Fanson, P.T., Horton, M.R., Delgass, W.N. et al. (2003) FTIR Analysis of Storage Behavior and Sulfur Tolerance in Barium-Based NOx Storage and Reduction (NSR) Catalysts, Appl. Catal. B Environ., 46, 393. 

Table 11.6. Experimental levels of reaction conditions which were investigated for response surface study of NOx storage and reduction catalysts...

Hendershot, R.J., Vijay, R., Feist, B.J. et al. (2005) Multivariate and univariate analysis of infrared imaging data for high-throughput studies of NH3 decomposition and NOx storage and reduction catalysts. Meas. Sci. Technol. 16, 302. 

Hendershot, R.J. (2004) Statitically Guided High-Throughput Experimentation of NOx storage and Reduction. Doctoral Thesis, Morris Library, University of Delaware. 

Takahashi, N., Shinjoh, H., Iijima, T. et al. (1996) The new concept 3-way catalyst for automotive lean-burn engine NOx storage and reduction catalyst. Catal. Today, 27, 63. 

Hendershot, R.J., Rogers, W.B., Snively, C.M. et al. (2004) Development and optimization of nox storage and reduction catalysts using statistically guided high-throughput experimentation. Catal. Today, 98, 375. 

PM precious metal, MNOxstorage compound Fig. 21. NOx storage and reduction scheme on NSR catalyst. 

Since the first introduction of NSRC in Japan in 1994 (Takahashi et al., 1996), there has been a large, exponentially increasing number of publications dealing with different aspects of the NOx storage and reduction catalysis—cfi, e.g., the reviews by Epling et al. (2004a) and Burch (2004). Here we shall discuss briefly only the issues important for the development of an effective and robust mathematical model of an NSRC, which can be used for simulations in the ExACT. 

Olsson et al. focused on microkinetic models aiming to describe in detail the transient steps in the NOx storage and reduction process. First, the NO oxidation sub-model on Pt/y-Al203 and Pt/Ba0/y-Al203 was developed (Olsson et al., 1999), then the NOx storage sub-model (Olsson et al., 2001) and finally the mean-field microkinetic NOx storage and reduction model (Olsson et al.,... 

Sharma et al. (2005) developed a ID two-phase model for the analysis of periodic NOx storage and reduction by C3H6 in a catalytic monolith, based on a simplified kinetic scheme. They focused on the evaluation of temperature and reaction fronts along the monolith and their effect on NOx conversion. Kim et al. (2003) proposed a phenomenological control-oriented lean NOx trap model. 

A great effort is underway to develop reliable aftertreatment systems for lowering NOx emissions from diesel and LB engines. A variety of approaches have been proposed for NOx aftertreatment of advanced vehicles including lean NOx catalysts (LNC), NOx storage and reduction (NSR) catalysts, selective catalytic reduction with urea (urea-SCR), and plasma-assisted catalysis (PAC). Lean NOx catalysts are mainly designed to reduce NOx with unburned hydrocarbons already included in the exhaust stream in the presence of O2 but result in... 

Takahashi, N., Shinjoh, H., Iijima, T., Suzuki, T., Yamazaki, K., Yokota, K., Suzuki, H., Miyoshi, N., Matsumoto, S., Tanizawa, T., Tanaka, T., Tateishi, S. and Kasahara, K. (1996) The new concept3-way catalyst for automotive lean-burn engine NOx storage and reduction catalyst. Catal. Today, 27, 63-69. 

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