Patent ID: 9533275
Date: 2017-01-03
CPC Classifications: B01J,C01B,F23C,F27D

Claim:
1. A furnace for performing an endothermic process comprising tubes containing a catalyst for converting a gaseous feed, wherein said tubes are positioned in inside the furnace, inner burners mounted to a furnace roof between the tubes, and outer burners mounted to the furnace roof between the tubes and a furnace wall, wherein the outer burners are positioned such that the distance of the central axis of each outer burner to the furnace wall is less than 25% of the distance between the outermost tubes and the furnace wall, and that the outer burners are configured to operate with 45-60% of the power of the inner burners and with an inlet velocity between 90 to 110% of the inlet velocity of the inner burners.