| 摘要 |
<p>1. A method of manufacturing ammonia from natural gas, LPG, naphtha or gases already containing hydrogen, according to which a combined, autothermic reformation takes place and oxygen and pre-heated air are supplied to the system as separate gas streams, characterised by stages which, considered individually, are partly known per se, and which involve : making available additional oxygen from a concentrated oxygen stream of at least 50% oxygen content, which is to be supplied separately in addition to the oxygen in the air, this concentrated oxygen stream being pre-heated to not more than 250 degrees C ; the pre-heating of the air stream to a temperature between 450 and 900 degrees C ; and the adjustment of the desired H2 /N2 ratio with the air stream and/or the additional oxygen stream at the start of the reformation stage.</p> |
