Patent ID: 9272905
Filing Date: 2016-03-01
CPC Classification: C01B

Claim Text:
1. A method of steam methane reforming in a furnace that includes a plurality of adjacent center cells with down-fired burners, and a pair of outer cells with down-fired burners on opposed sides of said plurality of center cells, said method comprising: steam methane reforming by first introducing methane and steam to a plurality of process tubes; combusting gases through said plurality of center cells with down-fired burners at a burner discharge velocity of V m/s, wherein said plurality of center cells with down-fired burners have a mass flow rate of X kg/s; combusting gases through said outer cells with down-fired burners at a burner discharge velocity in a range of 1.5V-2V m/s wherein said outer cells with down-fired burners have a mass flow rate in a range of 0.5X-0.65X kg/s; and discharging combustion products from said outer cells with down-fired burners and said plurality of center cells with down-fired burners at a substantially uniform momentum.