Electric furnace with thermal profile management & methods of steam cracking with electric furnace

A radiative electric furnace comprising:

• a housing defining a radiant heating chamber having a first end and a second end separated from the first end by a chamber length;
• one or more first electric heating elements disposed on a first side of the chamber;
• one or more second electric heating elements disposed on a second side of the chamber and spaced apart from the first electric heating element(s);
• a plurality of hollow first coils, each first coil having an inlet section, an outlet section, and a medial section between the inlet section and outlet section, where the inlet section and outlet section extend in a first direction from the first end of the chamber toward the second end, and the medial section is disposed closer to the second end of the chamber than to the first end;
• a plurality of hollow second coils, each second coil having an inlet section, an outlet section, and a medial section between the inlet section and outlet section, where the inlet section and outlet section extend in a second direction from the second end of the chamber toward the first end, and the medial section is disposed closer to the first end of the chamber than to the second end;
• one or more fluid inlet conduits in fluid communication with the inlet sections of the first and second coils;
• where the furnace is configured to receive fluid into fluid inlet conduit(s) such that the fluid flows sequentially through the inlet sections of the first and second coils, the medial sections of the first and second coils, and the outlet sections of the first and second coils.