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Information × Registration Number 0221U105373, 0120U100729 , R & D reports Title Development of new technology and adjustment of production of the pilot batch of Cu-Zn-Al oxide catalysts with a crust structure for selective reduction of nitrogen oxides in gas emissions of nitric acid production popup.stage_title Head Soloviov Serhii O., Доктор хімічних наук Registration Date 29-06-2021 Organization L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine popup.description2  The chemical composition of aluminum-copper-zinc oxide catalyst and the synthesis technique optimized, which provides the formation of a crust structure of the active layer for granule surface of carrier A-1 (based on γ-Al2O3) and high activity and selectivity of ACZ catalyst in the reduction of nitrogen oxides with ammonia. The influence of modifying additives (Fe2O3, CeO2, ZrO2, Mn3O4) in the composition of the ACZ catalyst on the indicators of NOx reduction and residual ammonia conversion were studied. It was found that the presence of a certain amount of NH3*H2O in the solution of copper and zinc nitrates for impregnation of carrier A-1 provides the formation on the surface of the granules of the catalytic coating of the crust structure with the maximum concentration of copper in the surface layer most accessible for selective reduction of nitrogen oxides. The best results are achieved when the content of 0.6% NH3 (in the form of NH3*H2O) in the solution for impregnation. The results of comparative studies indicate that the proposed method of preparation of the catalyst ACZ crust structure ACZ-CS) provides higher performance (activity and selectivity), which reduces the temperature of the SCR process and reduce ammonia consumption. The research results were used to develop design documentation for the manufacture of a pilot plant for testing the developed catalysts in industrial conditions of nitric acid production and preparation of an experimental batch of aluminumzinc catalyst crust structure ACZ-CS. Product Description popup.authors popup.nrat_date 2021-06-29 Close