Gold and Ceria as Catalysts for VOC Abatement: A Review
نویسندگان
چکیده
Due to its excellent oxygen storage capacity, ceria is a well-known oxidation catalyst. However, performance in the of volatile organic compounds can be improved by introduction gold. Depending on type VOC oxidized, surface gold nanoparticles and gold/ceria interface may contribute enhanced activity and/or selectivity. Choosing proper preparation method crucial obtain optimal particle size. Deposition–precipitation was found more suitable than coprecipitation or impregnation. For industrial applications, monolithic catalysts are needed minimize pressure drop reactor reduce mass heat transfer limitations. In addition approach used with powder catalysts, employed introduce in/on washcoat has considered.
منابع مشابه
Gold–ceria catalysts for low-temperature water-gas shift reaction
Nanostructured Au–ceria is a promising new catalyst for low-temperature water-gas shift (LTS). Preparation, characterization, and catalytic properties of this material are reported in this paper. Gold–ceria was prepared by deposition–precipitation (DP), coprecipitation (CP), and gelation methods. The gold loading was varied between 1 and 8.3 at.%, while lanthanum used as a dopant in ceria, was ...
متن کاملEthyl Acetate Abatement on Copper Catalysts Supported on Ceria Doped with Rare Earth Oxides.
Different lanthanide (Ln)-doped cerium oxides (Ce0.5Ln0.5O1.75, where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt. %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N₂ adsorption at -196 °C, scanning/transmission electron microscopy, ...
متن کاملLow-content gold-ceria catalysts for the water–gas shift and preferential CO oxidation reactions
Low-content (<0.6 at.%) gold-ceria samples were prepared by one-pot synthesis by the urea gelation/co-precipitation method, and by sodium cyanide leaching of high-content (5 at.%) gold-ceria materials prepared by deposition–precipitation. These catalysts, containing cationic gold in ceria, are active for both the low-temperature water–gas shift (WGS) reaction and the preferential oxidation of C...
متن کاملCeria in Automotive Exhaust Catalysts
Oxygen storage capacities of CeOz, Ce02/A1203, and PMiCe0,/A120~, measured by a pulse injection method, are affected by pretreatment temperature, pulsing temperature, partial pressure of CO, presence of precious metals (PM), and the concentration of CeOz on alumina. They are lowered by higher pretreatment temperature but increase with the pulsing temperature in the range of application. At a pu...
متن کاملDiesel soot combustion ceria catalysts
This review article summarizes the contents of the keynote lecture with the same tittle presented at the 7 th edition of the International Conference on Environmental Catalysis hold in Lyon (France) in September 2012. Different aspects of the ceria-catalyzed Diesel soot combustion reactions have been critically discussed, such as the high catalytic activity of ceria for Diesel soot combustion i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Catalysts
سال: 2021
ISSN: ['2073-4344']
DOI: https://doi.org/10.3390/catal11070789