| 摘要 |
Hydrogen for ammonia production is recovered (e.g. by pressure swing absorption) in high purity from a methanol synthesis plant purge gas stream. High purity nitrogen is produced by nitrogen enrichment of air and combined with the high purity hydrogen for passage to an ammonia synthesis reactor. Schemes are described for effecting ammonia synthesis at or above the pressure at which the hydrogen is produced, with ammonia recovery by condensation against cooling water, by refrigeration or by absorption in a liquid absorbent, such as water or dilute aqueous ammonia solution. |
