Merck

Low-temperature selective catalytic reduction of NO on CeO2-CuO/Al2O3 catalysts prepared by different methods.

Environmental technology (2014-06-25)
Rui-Tang Guo, Wen-Long Zhen, Wei-Guo Pan, Jie-Nan Hong, Qiang Jin, Cheng-Gang Ding, Shi-Yi Guo
RESUMEN

CeO2-CuO/Al2O3 catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3 were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol-gel (SG) method showed the best SCR activity and resistance to SO2 and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer-Emmett-Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2-CuO/Al2O3 catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3 adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Water, for embryo transfer, sterile-filtered, BioXtra, suitable for mouse embryo cell culture
Sigma-Aldrich
Water, PCR Reagent
Sigma-Aldrich
E-Toxate Water, endotoxin, free
Sigma-Aldrich
Water, sterile-filtered, BioReagent, suitable for cell culture
Supelco
Copper (impurities), manufactured by MBH Analytical Ltd (39X 17868)
Supelco
Water, suitable for ion chromatography
Supelco
Water, for TOC analysis
Sigma-Aldrich
Copper, wire, diam. 1.0 mm, ≥99.9%
Sigma-Aldrich
Copper, powder, <75 μm, 99%
Sigma-Aldrich
Copper, beads, 2-8 mm, 99.9995% trace metals basis
Sigma-Aldrich
Copper, foil, thickness 1.0 mm, 99.999% trace metals basis
Sigma-Aldrich
Aluminum oxide, mesoporous, MSU-X (wormhole), average pore size 3.8 nm
Sigma-Aldrich
Copper, rod, diam. 11 mm, 99.9999% trace metals basis
Sigma-Aldrich
Water, deuterium-depleted, ≤1 ppm (Deuterium oxide)
Sigma-Aldrich
Copper(II) oxide, nanopowder, <50 nm particle size (TEM)
Supelco
Water, for HPCE, for luminescence, suitable for UV/Vis spectroscopy
Sigma-Aldrich
Copper, beads, 2-8 mm, ≥99.99% trace metals basis
Sigma-Aldrich
Water, for cell biology, sterile ultrafiltered
Sigma-Aldrich
Copper, turnings, purum p.a., ≥99.0%
Sigma-Aldrich
Copper, electrolytic, Analytical Reagent, reag. Ph. Eur., ≥99.9% (complexometric), wire
Sigma-Aldrich
Copper, wire, diam. 2.0 mm, 99.999% trace metals basis
Sigma-Aldrich
Copper, wire, diam. 0.25 mm, 99.999% trace metals basis
Sigma-Aldrich
Copper(II) oxide, powder, 99.995% trace metals basis
Sigma-Aldrich
Copper(II) oxide, 99.999% trace metals basis
Sigma-Aldrich
Copper, foil, thickness 0.025 mm, 99.98% trace metals basis
Electrolytic tough pitch copper (O), BCR®, certified reference material, disc
Sigma-Aldrich
Water, for molecular biology, sterile filtered
Sigma-Aldrich
Water, tested according to Ph. Eur.
Continuous cast copper (O), BCR®, certified reference material, rod
Sigma-Aldrich
Copper, foil, thickness 0.5 mm, 99.98% trace metals basis