Macroscopic nitrogen-doped mesoporous carbon coated silicon carbide catalyst (NMC/SiC) has been developed and fully evaluated as metal-free catalyst for selective oxidation of H2S into elemental sulfur under various conditions using both noncontact inductive heating (IH) and classical Joule heating (JH) modes. The results obtained indicated that the coated SiC catalyst exhibits excellent desulfurization performance when operated under induction heating. Indeed, when operated with IH, the catalyst displays better desulfurization performance under challenging reaction conditions, i.e., low reaction temperature (180 oC) and high gaseous space velocity (3,600 h-1), compared with that using indirect convection/conduction JH mode. The high desulfurization performance was attributed to the high effective heat management inside the catalyst bed through IH along with a short diffusion length associated with the nanoscopic dimension of the nitrogen-doped carbon coating layer on the macroscopic silicon carbide host substrate. The catalyst also displays a high stability as a function of time on stream thanks to the high stability and activity of the nitrogen sites.

This article is Open Access

Please wait while we load your content... Something went wrong. Try again?