Process and apparatus for reacting feed with a fluidized catalyst over a temperature profile

A process for contacting a reactant stream with catalyst comprising:

• feeding a reactant stream to a reactor;
• contacting said reactant stream with a first catalyst stream to produce product gases;
• contacting said reactant stream with a second catalyst stream to produce product gases after contacting said reactant stream with said first catalyst stream, said second catalyst stream having a higher temperature than said first catalyst stream;
• separating said first catalyst stream and said second catalyst stream from product gases;
• and
• discharging said product gases from said reactor.

A process for contacting a paraffin reactant stream with dehydrogenation catalyst comprising:

• feeding said paraffin reactant stream to a reactor;
• contacting said paraffin reactant stream with a first dehydrogenation catalyst stream to produce olefin product gases;
• contacting said paraffin reactant stream with a second dehydrogenation catalyst stream to produce olefin product gases after contacting said reactant paraffin stream with said first dehydrogenation catalyst stream, said second dehydrogenation catalyst stream having a higher temperature than said first dehydrogenation catalyst stream;
• separating said first dehydrogenation catalyst stream and said second dehydrogenation catalyst stream from said olefin product gases;
• and
• discharging said olefin product gases from said reactor.