TPD study of NH3 adsorption/desorption on the surface of V/Ti, V/Al based catalysts for selective catalytic reduction of NOx by ammonia 1. TPD test of γ-Al2O3, TiO2 (anatase) and alumina-supported vanadia catalysts |
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| Authors: | N M Popova L A Sokolova E A Marchenko and L N Bobrova |
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| Institution: | (1) D.V. Sokolsky Institute of Organic Catalyst and Electrochemistry, National Academy of Sciences, 480100 Almaty, Republic of Kazakhstan;(2) Boreskov Institute of Catalysis, SB RAS Novosibirsk, 630090, Russia |
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| Abstract: | The effect of temperature on the adsorption/desorption of ammonia from the air mixture on the surface of γ-Al2O3, TiO2 (anatase) and alumina-supported vanadia catalyst samples has been investigated using temperature-programmed desorption (TPD).
When the vanadia loading was increased, the fraction of the acid sites providing the NH3 adsorption in the high-temperature state decreased. At the same time, the fraction of the medium temperature state significantly
increased. |
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| Keywords: | Adsorption/desorption TPD γ -Al2O3 TiO2 (anatase) alumina-supported vanadia catalysts |
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