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2 2002

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DeNO(x) na sitach molekularnych zawierających miedź. Cz.2. Katalityczny rozkład NO

Sobczak I., Ziółek M.

Wiadomości Chemiczne

2002

[Z] 56, 3-4

177-202

Part II of the series dealing with DeNOx carried out on dopper-containing molecular sieves is devoted to the various features responsible for the catalytic activity of Cu-molecular sieves in the NO decomposition. The physico-chemical properties of the catalysts were shown in Part I ("Wiadomości Chemiczne" 2002, 56, 1-2, 83), whereas in Part II they are related to the decomposition of NO. This paper describes the role of the Si/Al and Cu/Al rations, the conditions of the catalysts preparation and activation, the influence of the T-element nature in the framework of molecular sieves as well as co-cations on the yield in the NO decomposition. Moreover, some proposals of the mechanism of this reaction described in the literature are included.

DeNO(x) na sitach molekularnych zawierających miedź. Cz.1. Fizykochemiczna charakterystyka katalizatorów

Sobczak Izabela, Ziółek Maria

Wiadomości Chemiczne

2002

[Z] 56, 1-2

83--111

Since 1986 when Iwamoto and coworkers discovered a very high activity of Cu-ZSM-5 zeolites in NO decomposition a huge number of papers has been devoted to various copper - containing catalysts. This review paper sums up the results presented in so far published articles concerning physico-chemical properties of micro- and mesoporous molecular sieves modified with copper. Cu-ZSM-5 is the most frequently studied zeolite and Cu-AlMCM-41 belongs to the most frequently studied mesoporous materials. Therefore, in this paper a short characteristic of ZSM-5 and MCM-41 molecular sieves is performed, as well as the precise data from FTIR, ESR and H2-TPR studies applied to the characterisation of Cu-state on the catalyst surface are presented (the Cu-species have been identified on the basis of these data).