PROCESS FOR THE PREPARATION OF GASES WHICH CONTAIN HYDROGEN AND NITROGEN

摘要

Prepn. of H2-and N2-contg. gases starting from natural gas or virgin naphtha involves steam-reforming in 2 stages then air-reforming in 1 stage. The process involves feeding the starting gas to the first steam-reforming stage at 400-650≦̸C to convert 20-50% of the gas. The partially converted starting gas is removed from the first stage at 650-750≦̸C then fed to the second steam-reforming stage to convert 70% or less of the starting gas. The partially converted starting gas is then removed at 750-850≦̸C and fed to the air-reforming stage, and is further converted with burning air by raising and mintaining the temp. at 920-1050≦̸C. The gas obtd. has a temp. whose sensible heat is used to actuate the second steam reforming stage.