Alumina supported cobalt–palladium catalysts for the reduction of NO by methane in stationary sources

Surface engineering and palladium dispersion in MCM-41 for methane oxidation

“…These bands can be attributed to d π -p π metal-ligand charge transfer transitions between Pd 2+ and O 2-of small PdO particles [32]. In addition, a broad absorption band at 380 nm can be assigned to d-d transitions of Pd(II) ions [33]. Finally, the intensity of these bands increases with the template extraction rate.…”

Selective reduction of NO X in diesel exhaust with hydrocarbons over alumina in NEDC conditions

“…Then, the deNO X reaction on alumina is expected from 90°C to 360°C and over 370°C according to the model proposed in figure 2. Moreover, it must be emphasized that the deNO X model is based on the formation of adsorbed R-NO X species due to the reaction between initial HC and adsorbed NO 2 [12,17]. Then decomposition of the pre-adsorbed R-NO X species generates NO and C X H Y O Z species.…”

“…According to this model, an effective automotive catalyst for lean NO X reduction has to ensure these threecatalytic cycles which have to turn over simultaneously. In previous studies, this model was applied to several catalysts [10][11][12]. Among them, alumina used as simple catalyst has yielded promising results since it provides a significant catalytic activity above 250°C [13].…”

Enhancement of 3-Way CNG Catalyst Performance at High Temperature Due to the Presence of Water in the Feed: On the Role of Steam Reforming of Methane and on the Influence of Ageing

“…At 500°C all the amount of HC supplied is reacting with water. The reaction occurring is mainly the steam reforming of methane: CH 4 ?…”

“…Three-way catalysts, which are known as effective for simultaneous NO x , CO and HC removal by their interaction with noble metals as Rhodium, Platinum and Palladium. Moreover, palladium has gained especial attention particularly for compressed natural gas (CNG) vehicles applications due to its high performance for methane abatement in lean or stoichiometric conditions [2][3][4]. In the last years, authors focalized essentially on the understanding of mechanism and kinetic of the reactions CO ?…”