Processes for dehydrogenating alkanes and alkyl aromatic hydrocarbons

A process for upgrading a hydrocarbon, comprising:

• (I) contacting a hydrocarbon-containing feed with fluidized dehydrogenation catalyst particles in a conversion zone to effect dehydrogenation of at least a portion of the hydrocarbon-containing feed to produce a conversion effluent comprising coked catalyst particles and one or more dehydrogenated hydrocarbons, wherein:
• the hydrocarbon-containing feed comprises one or more of C2-C16 linear or branched alkanes, one or more of C4-C16 cyclic alkanes, one or more of C8-C16 alkyl aromatic hydrocarbons, or a mixture thereof,
• the hydrocarbon-containing feed contacts the catalyst particles at a weight hourly space velocity in a range from 0.1 hr−1 to 1,000 hr−1, based on the weight of any C2-C16 alkanes and any C8-C16 aromatic hydrocarbons in the hydrocarbon-containing feed,
• a weight ratio of the fluidized dehydrogenation catalyst particles to a combined amount of any C2-C16 alkanes and any C8-C16 aromatic hydrocarbons is in a range from 3 to 100, and
• the hydrocarbon-containing feed and the catalyst particles are contacted at a temperature in a range from 600° C. to 750° C.;
• (II) separating from the conversion effluent a first particle stream rich in the coked catalyst particles and a first gaseous stream rich in the one or more dehydrogenated hydrocarbons;
• (III) contacting at least a portion of the coked catalyst particles in the first particle stream with an oxidant and a fuel in a combustion zone to effect combustion of at least a portion of the coke to produce a combustion effluent comprising catalyst particles lean in coke and a combustion gas, wherein a dehydrogenation activity of the catalyst particles lean in coke is less than a dehydrogenation activity of the coked catalyst particles;
• (IV) separating a second particle stream rich in the catalyst particles lean in coke and a second gaseous stream rich in the combustion gas from the combustion effluent;
• (V) contacting at least a portion of the catalyst particles lean in coke in the second particle stream with an oxidative gas in an oxygen soak zone at an oxidizing temperature in a range from 620° C. to 1,000° C. for a duration of at least 20 seconds to produce conditioned catalyst particles having an activity that is less than the coked catalyst particles, wherein the oxidative gas comprises no greater than 5% H2O based on the total moles in the oxidative gas;
• (VI) contacting at least a portion of the conditioned catalyst particles with a reducing gas in a reduction zone to produce regenerated catalyst particles having a dehydrogenation activity that is greater than the coked catalyst particles;
• (VII) contacting an additional quantity of the hydrocarbon-containing feed with at least a portion of the regenerated catalyst particles in the conversion zone to produce an additional quantity of the conversion effluent comprising re-coked catalyst particles and an additional quantity of the one or more dehydrogenated hydrocarbons;
• (VIII) cooling the first gaseous stream to produce a cooled gaseous stream;
• (IX) compressing at least a portion of the cooled gaseous stream to produce a compressed gaseous stream;
• and
• (X) separating a plurality of products from the compressed gaseous stream.