Plasma-catalytic CO2 dry methane reforming (DRM) using multi-needle electrode

This project focuses on the controlled modulation of plasma discharge modes using multi‑needle electrodes, aiming to transition from random filamentary discharges to stable streamer discharges for application in methane dry reforming (DRM) with simultaneous carbon fixation. The stable streamer regime generated by the multi‑needle electrode configuration exhibits enhanced energy density and a significantly higher production of reactive species within the discharge zone, which promotes more efficient activation of both CH4 and CO2. Unlike conventional DRM processes operated under filamentary conditions—where amorphous carbon deposits often lead to reactor clogging and undesirable dielectric breakdown—the streamer mode enabled by the multi‑needle architecture facilitates the deposition of carbon in a fibrous, well‑structured morphology. This fibrous carbon is readily collectable, thereby offering a practical route for solid‑state carbon sequestration. Overall, this work demonstrates that tailoring the discharge pattern via electrode design not only improves process stability and reactivity but also provides a viable strategy for converting greenhouse gases into value‑added solid carbon products.