Methods for making light olefins by dehydrogenation using catalysts that include iron

A method for making light olefins by dehydrogenation, the method comprising:

• contacting a hydrocarbon-containing feed with a catalyst in a reactor to form an olefin-containing effluent;
• at least partially separating the olefin-containing effluent from the catalyst;
• passing the catalyst to a combustor and heating the catalyst by combusting a supplemental fuel, wherein the supplemental fuel comprises methane in an amount of greater than or equal to 1 mol. %;
• passing the catalyst from the combustor to the reactor, such that at least a portion of the catalyst continuously cycles between the reactor and the combustor;
• wherein the catalyst comprises:
• from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium, or combinations thereof;
• from 5 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof;
• from 100 ppmw to 30000 ppmw of iron;
• and at least 85 wt. % support.