NOX Storage and reduction catalysts

In the following section, the contribution of the noble metal component will be discussed with regard to its contribution (i) during the storage (lean conditions) process, then (ii) during the NOx release and reduction process (stoichiometric/rich conditions) and finally (iii) involving the deactivation and reactivation due to sulphate poisoning. 

We thank Ms A. Iglesias-Juez, Ms A.B. Hungrfa, Dr Z. Liu and Profs. J. Soria and G. Munuera for useful comments and discussions. Support from CICYT (Project MAT2000-1467), the EPSRC and the Royal Society (London) is gratefully acknowledged. 

Martinez-Arias, M. Fernandez-Garcia, A. B. Hungrfa, A. Iglesias-Juez, K. Duncan, R. Smith, J. A. Anderson, J. C. Conesa, J. Soria, J. Catal. 2001, 204, 238. 

Takahashi, H. Shinjoh, T. Iijima, T. Suzuki, K. Yamazaki, K. Yokota, 

Suzuki, N. Miyoshi, S. Matsumoto, T. Tanizawa, T. Tanaka, S. Tateishi, K. Kasahara, Catal. Today 1996, 27, 63. 

---

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. 

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. 

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. 

The operation of one of these NOx storage and reduction catalyst systems, and the composition of the sophisticated nanocomposite material which is integral to the process, is described in the following. 

---