Processes for Upgrading Alkanes and Alkyl Aromatic Hydrocarbons

A process for upgrading a hydrocarbon, comprising:

• (I) contacting a hydrocarbon-containing feed with a catalyst comprising Pt disposed on a support to effect one or more of dehydrogenation, dehydroaromatization, and dehydrocyclization of at least a portion of the hydrocarbon-containing feed to produce a coked catalyst and an effluent comprising one or more upgraded hydrocarbons and molecular hydrogen:
• the hydrocarbon-containing feed comprises one or more of C2-C16 linear or branched alkanes, or one or more of C4-C16 cyclic alkanes, or one or more C8-C16 alkyl aromatics, or a mixture thereof;
• wherein
• the hydrocarbon-containing feed and catalyst are contacted at a temperature in a range from 300° C. to 900° C., for a time period of ≤3 hours, under a hydrocarbon partial pressure of at least 20 kPa-absolute, wherein the hydrocarbon partial pressure is the total partial pressure of any C2-C16 alkanes and any C8-C16 alkyl aromatics in the hydrocarbon-containing feed;
• the catalyst comprises from 0.05 wt % to 6 wt % of Pt based on the weight of the support;
• and
• the one or more upgraded hydrocarbons comprise at least one of a dehydrogenated hydrocarbon, a dehydroaromatized hydrocarbon, and a dehydrocyclized hydrocarbon;
• (II) contacting at least a portion of the coked catalyst with an oxidant to effect combustion of at least a portion of the coke to produce a regenerated catalyst lean in coke and a combustion gas;
• and
• (III) contacting an additional quantity of the hydrocarbon-containing feed with at least a portion of the regenerated catalyst to produce a re-coked catalyst and additional effluent, wherein a cycle time from the contacting the hydrocarbon-containing feed with the catalyst in step (I) to the contacting the additional quantity of the hydrocarbon-containing feed with the regenerated catalyst in step (III) is ≤5 hours.