![]() (15) However, despite the continually increasing interest in using microwaves in many areas of chemistry, the fundamental nature of the interaction of materials (catalysts) and chemicals (reactants) with microwaves remains unclear. Dielectric heating by high-frequency electromagnetic radiation occurs for carbon particles and causes them to rapidly heat up. During the dehydrogenation of hexadecane on a Fe/SiC catalyst, active carbon species were formed at the early stage of the reactions but were subsequently transformed into filamentous but catalytically inert carbons that ultimately deactivated the operating catalyst.Ĭarbon materials have long been used as microwave receptor/acceptors for effective energy transfer because of their widely recognized highly efficient microwave absorption. Despite the excellent microwave absorption properties observed among these various carbons, only activated carbons and graphene nanoplatelets were found to be highly effective for the microwave-initiated dehydrogenation of hexadecane. Here, the catalytic activities of a range of carbon materials, together with carbon residues produced from a “test” reaction─the dehydrogenation of hexadecane under microwave-initiated heterogeneous catalytic processes, have been investigated. This property raises the intriguing possibility of using the all-pervasive carbonaceous deposits in operating heterogeneous catalytic processes to augment the catalytic performance of microwave-initiated reactions. ![]() ![]() Carbon materials have been widely used as microwave susceptors in many chemical processes because they are highly effective at transforming incoming electromagnetic energy for local (hot spot) heating. ![]()
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