Mechanism on the plasma-catalytic oxidation of graphitic carbon over Au/γ-Al2O3 by in situ plasma DRIFTS-mass spectrometer

Soot Oxidation in a Plasma-Catalytic Reactor: A Case Study of Zeolite-Supported Vanadium Catalysts

“…Thus, the possibilities of effective utilization of these reactive species would be reduced, leading to a decrease in the soot oxidation rate. It can be deduced that increasing the reaction temperature would not significantly affect the reaction pathways of CO2 formation in the plasma-catalytic soot oxidation system, and similar results have been widely reported in plasma-induced oxidation processes [11,42].…”

“…More recently, the combination of non-thermal plasma and heterogeneous catalysts has become an emerging alternative for the oxidation of volatile organic compounds (VOCs) and the partial oxidation of hydrocarbons under atmospheric pressure and temperatures ranging from room temperature to 300 • C [8][9][10]. As with soot oxidation, Lu et al reported that the oxidation of graphitic carbon over an Au/γ-Al 2 O 3 catalyst in a plasma environment was improved compared to pure γ-Al 2 O 3 in the temperature range of 20 • C to 300 • C [11]. Liu et al investigated plasma-catalytic oxidation of soot over a series of Ag and Co codoped perovskite catalysts, while a soot oxidation rate of 85% was achieved at 200 • C over an La 0.5 A 0.5 Mn 0.8 Co 0.2 O 3 (A = Ag or Co) catalyst [12].…”

Unveiling the Surface Chemical Reactions during Multi-Phase Catalytic Oxidation of Soot on Nanoengineering/Interfacing/Doping-Prepared Mn-CeO2 Catalysts Using TG-MS and Operando DRIFTS-MS

“…The operando DRIFT-MS results (Figure ) implied that the Mn-doped CeO 2 with a Ce–O–Mn structure plays key roles in supplying bridge-type O to soot and contributes soot surface oxidation to form intermediates (such as −CO and −COO). , However, Mn 2 O 3 does not show distinct changes during soot oxidation. Thus, Mn 2 O 3 functions as a regulator to adjust the metal valence between Ce and Mn, following eq , since the doped CeO 2 has the highest Ce 3+ and Mn 4+ , which can be confirmed from the XPS analysis result. Ce 4 + + Mn 3 + → Ce 3 + + Mn 4 + …”

Investigation of ZrMnFe/Sepiolite Catalysts on Toluene Degradation in a One-Stage Plasma-Catalysis System

“…Catalysts introduced in NTP reactors are usually supported by different porous materials to achieve a higher dispersion of the active components and obtain a better catalytic performance. The most commonly used supports are activated carbon fiber [25], alumina [26], zeolite [27], etc. Exploring and developing the catalyst and the catalysis support with good VOC adsorption surface areas, stable catalytic ability and good anti-deactivation is an important topic of plasma-catalyst VOC decomposition and its practical application [28,29].…”