Process for preparing ammonia and carbon dioxide

摘要

A process is proposed for preparing ammonia and carbon dioxide, wherein a feed gas rich in light hydrocarbons is converted into a cracked gas by steam reforming. The cracked gas is subjected to carbon monoxide conversion and separated into hydrogen, carbon dioxide and residual gas. The hydrogen thus obtained is fed together with nitrogen into an ammonia synthesis. At least a substream of the feed gas is reacted with oxygen or with oxygen-rich gas, optionally in the presence of steam, and the gas mixture thus generated is supplied to steam reforming combined with the remaining feed gas and the remaining steam required for steam reforming.