SAPO-34 was prepared with a mixture of three templates containing triethylamine, tetraethylammonium hydroxide, and morpholine, which leads to unique properties for support and production cost reduction. Meanwhile, Cu/SAPO-34, Fe/SAPO-34, and Cu-Fe/SAPO-34 were prepared through the ion-exchanged method in aqueous solution and used for selective catalytic reduction (SCR) of NOx with NH3. The physical structure and original crystal of SAPO-34 are maintained in the catalysts. Cu-Fe/SAPO-34 catalysts exhibit high NOx conversion in a broad temperature window, even in the presence of H2O. The physicochemical properties of synthesized samples were further characterized by various methods, including XRD, FE-SEM, EDS, N2 adsorption-desorption isotherms, UV-Vis-DRS spectroscopy, NH3-TPD, H2-TPR, and EPR. The best catalyst, 3Cu-1Fe/SAPO-34 exhibited high NOx conversion (> 90%) in a wide temperature window of 250–600 °C, even in the presence of H2O. In comparison with mono-metallic samples, the 3Cu-1Fe/SAPO-34 catalyst had more isolated Cu2+ ions and additional oligomeric Fe3+ active sites, which mainly contributed to the higher capacity of NH3 and NOx adsorption by the enhancement of the number of acid sites as well as its greater reducibility. Therefore, this synergistic effect between iron and copper in the 3Cu-1Fe/SAPO-34 catalyst prompted higher catalytic performance in more extensive temperature as well as hydrothermal stability after iron incorporation.
Catalysis - Wikipedia
Catalysts, Free Full-Text
Catalysts, Free Full-Text
Recent advances in application of UV light-emitting diodes for degrading organic pollutants in water through advanced oxidation processes: A review - ScienceDirect, Uv Light
Recyclable ligand-free mesoporous heterogeneous Pd catalysts for
Enzymes: Catalysts and Their Function, Study notes Acting
Bleeding disorders linked to synthetic cannabinoids use- State Hygienic Lab - The University of Iowa, Fake Weed
Catalysts, Free Full-Text
Catalysts, Free Full-Text
News
Catalysts, Free Full-Text
Chem Catalysis (@ChemCatalysis) / X
Sintering and Coke Resistant Core/Yolk Shell Catalyst for
Catalysts for Change: How the U.N.'s Independent Experts Promote
BNC adds new patent to its portfolio for novel device measuring