Local Joule heating targets catalyst surface for hydrocarbon combustion

Joule-Heated Catalytic Reactors toward Decarbonization and Process Intensification: A Review

“…Joule heating is applicable when a given material, i.e., a resistor, is connected to an electric circuit. The Joule heating substrate should be physically continuous, therefore the direct heating of pellet catalysts by Joule effect is very challenging since it is practically difficult to control the size of the contact area of conductive particles. ,− On the other hand, the Joule heating concept can be applicable to systems with structured catalysts, ,, where the heating elements can be catalyst coated reactor walls, ,, or catalyst activated heating elements such as heating wires, , open-cell foams, − or even some commercial heaters, − as summarized in Figure .…”

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.…”