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Progress in Petrochemical Science

Growth of Dendritic Nano-sized Carbon Spines in a Vortex Field over the Pt-aided Sublimation Frontier

Submission: July 14, 2020 Published: August 13, 2020

DOI: 10.31031/PPS.2020.03.000566

ISSN 2637-8035
Volume3 Issue4


When a cool N2-CO2 co-gas stream flows over superheated activated carbon (AC) flakes, a vortex field near the interface is induced as a consequence of the confrontation of the cool co-gas stream and the hot vaporized carbon stream, where the pre-deposited Pt atom clusters on AC catalyze gasification of AC by CO2 to produce CO, and the CO undergoes immediate disproportionation to release carbon atoms in vapor form. The vortex field functions as a dynamic template for deposition of carbon vapor, leading to the proliferation of nano-sized carbon needles with characteristic spikes (ca. 1µm) and short in length through an anisotropic assembling of carbon atoms. A trace amount of Pt pre-coated on the AC flakes is sufficient to catalyze gasifying AC by CO2. This phenomenon is the first observation over the surface of amorphous carbon via catalytic pyrolysis without electric potential assistance.

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