осушение синтез-газа жидким аммиаком

http://dramarnathgiri.blogspot.com/2012/08/mug-drying.html

One of the possible improvement for Kellogg type plants consists in re-arranging the synthesis loop for dry loop operation and send directly the fresh synthesis gas (called Make-Up Gas or MUG in this document) from the 4th stage of synthesis gas compressor to the ammonia converter 105-D instead of passing it through the ammonia condensing unit 117-C.

Because the MUG contains CO2 and H2O which are poisons for the ammonia synthesis catalyst, this requires removing these contaminants prior to the MUG feed to the ammonia converter.

Molecular sieves were used on a large scale in USA and in few plants in Western Europe to remove these contaminants but they require extensive maintenance to ensure the correct operation and tightness of HP block valves and the adsorbent material needs to be changed typically every 2 years. Furthermore the molecular sieves proved to be the source of many accidents in ammonia plants and are no more regarded as the preferred option.

CEAMAG offers a replacement technology to the molecular sieves with its MUG drying technology based on ammonia wash principle.

https://books.google.com.ua/books?id=xWz8CAAAQBAJ&pg=PA254&l...