Methods for dehydrogenating hydrocarbons

A method for dehydrogenating hydrocarbons, the method comprising:

• contacting a feed stream comprising one or more hydrocarbons with a particulate solid in a dehydrogenation reactor, wherein the particulate solid comprises an oxygen-carrier material, and wherein in the dehydrogenation reactor:
• the one or more hydrocarbons are dehydrogenated to form hydrogen and one or more products;
• and
• at least a portion of the hydrogen is reacted with oxygen from the oxygen-carrier material to form water and reduce the oxygen content in the oxygen-carrier material;
• passing the particulate solid from the dehydrogenation reactor to a processing zone, wherein:
• fuel is injected into the processing zone;
• in the processing zone, at least a portion of the fuel is reacted with oxygen from the oxygen-carrier material of the particulate solid;
• the gasses in the processing zone comprise less than or equal to 1 mol. % O2;
• passing at least a portion of the particulate solid from the processing zone to a regeneration unit, wherein the particulate solid is exposed to an oxygen-containing gas in the regeneration unit such that the content of oxygen in the oxygen-carrier material of the particulate solid is increased in the regeneration unit;
• and
• passing at least a portion of the particulate solid from the regeneration unit to the dehydrogenation reactor.