Affecting factors of electrified soot combustion on potassium-supported antimony tin oxides

Highly Reactive Peroxide Species Promoted Soot Oxidation over an Ordered Macroporous Ce0.8Zr0.2O2 Integrated Catalyzed Diesel Particulate Filter

“…Thus, the number of contact points between soot and V O -OM CZO catalysts can be improved dramatically during the reaction. Thus, the activated oxygen on the CZO surface can easily attack soot surface to gradually form the carbon–oxygen compounds, which is called “surface-oxygen complexes” (SOCs), followed by the decomposition of SOCs to CO 2 and CO. ,, Meanwhile, the catalytic performance of soot oxidation is promoted significantly, and soot will be ignited. As depicted in Figure c, the soot particles can penetrate into the bottom macropores of the OM CZO catalyst layer, so as to enable the more sufficient contact of soot and catalyst through fast mass transport and favorable gas diffusion for soot oxidation.…”

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

“…Simultaneously the soot-catalyst contact efficiency improves due to electrostatic fluidization of the catalystsoot interfaces. 277 Mei et al 278 reported such an electrification strategy aiming for a T 50 of <75 °C using conductive oxide catalysts such as K supported Sb−Sn oxides. The implementation of this technology into LTC engine modes could reduce soot emissions to a great extent.…”

“…This technology facilitates the rapid release of lattice oxygen from a conductive catalyst, thereby reducing the soot ignition temperature. Simultaneously the soot-catalyst contact efficiency improves due to electrostatic fluidization of the catalyst-soot interfaces . Mei et al reported such an electrification strategy aiming for a T 50 of <75 °C using conductive oxide catalysts such as K supported Sb–Sn oxides.…”

Electrification-Enhanced Low-Temperature NOx Storage–Reduction on Pt and K Co-Supported Antimony-Doped Tin Oxides

“…Another electrification strategy applying low voltages (a few volts) to conductive monolithic supports (composed of metal, , carbon, and Si-infiltrated silicon carbide, etc.) on which nonconductive catalysts are coated to trigger catalytic reactions with Joule heating decreased the ignition temperature of some gaseous pollutants from stationary sources. − Recently, we have made significant progress by employing conductive metal oxides as electrification catalysts for eliminating soot particulates, another important pollutant from diesel vehicles. , With the strategy, the ignition temperature for 50% of soot conversion is decreased to <75 °C using a conductive catalyst, that is, potassium-supported antimony-doped tin oxides (K/ATO). In that study, electrically driven release of lattice oxygen from the catalysts is found to be determinative for catalytic soot combustion rather than Joule heating, and this could also be applied to NSR, in which lattice oxygen also participated. , In particular, the temporal flexibility of electricity may benefit the NSR process during the cyclic switching of fuel-lean/fuel-rich atmospheres.…”