Intermediates in the selective reduction of NO by propene over Cu-Al2O3 catalysts: transient in-situ FTIR study

Article Abstract:

Systematic in-situ FITR studies have been undertaken of the formation and the reaction of adsorbed species in C3H6-SCR on Cu-Al2O3 catalyst. The role of dispersed Cu ions and the Al2O3 support in each reaction step is considered.

Metal catalysts

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Factors controlling activity and selectivity for SCR of NO by hydrogen over supported platinum catalysts

Article Abstract:

A study on the selective catalytic reduction of NO by H2 (H2-SCR) is carried out with Pt catalysts supported on various zeolites and nonzeolites metal oxides. The advantage of the acidic support, such as zeolites, in the selective formation of N2 is attributed to the storage capacity of the ammonia intermediate for the selective reaction pathways through NO and NH4+ on the acid sites.

Industrial Gas Manufacturing, Industrial gases, Hydrogen, Nitrogen Oxide Gases, Properties, Chemical properties, Platinum catalysts

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Alumina-supported gallium oxide catalysts for NO selective reduction: influence of the local structure of surface gallium oxide species on the catalytic activity

Article Abstract:

The influence of the coordination symmetry and surrounding matrix of the gallium species on the activity of Ga2O3/Al2O3 catalysts was investigated. This was done using X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The results show the dependence of the catalytic activity on Ga2O3 content. The influence of the local structure of the active species was also demonstrated and the action of the highly dispersed GaO4 tetrahedra in the surface spinel explained.

Catalysts, X-ray spectroscopy, Gallium compounds, Aluminum oxide

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