Removal of carbon monoxide, oxygen and acetylene from an oxidative dehydrogenation process

A method of converting an alkane to an alkene comprising:

• providing a first stream comprising an alkane, carbon dioxide, and oxygen to an oxidative dehydrogenation reactor containing an oxidative dehydrogenation catalyst supported on or agglomerated with a binder comprising AlO(OH) or Nb2O5;
• converting at least a portion of the alkane to the alkene in the oxidative dehydrogenation reactor in a carbon dioxide negative process to provide a second stream exiting the oxidative dehydrogenation reactor comprising the alkanes, the alkene, and oxygen or acetylene or both, wherein an amount of carbon dioxide in the second stream exiting the oxidative dehydrogenation reactor is in a range of from about −5 vol % to about −10 vol % of an amount of carbon dioxide in the first stream provided to the oxidation dehydrogenation reactor;
• and
• providing the second stream to a second reactor containing a catalyst comprising CuO and ZnO and reacting the second stream to provide a third stream exiting the second reactor comprising the alkane, the alkene, and a lower level of oxygen, a lower level of acetylene, or lower levels of both oxygen and acetylene compared to the second stream.