International cooperation of air separation equipment

Reasons for liquid air level and liquid nitrogen level rising during temporary shutdown

Decarbonisation of large ammonia plants using the dual high pressure adsorption process can be seen as using PSA decarbonisation as a pre-treatment unit for PSA purification of hydrogen and nitrogen. The process is to first remove the conversion gas to obtain 98% (v) decarbonised gas for urea and other processes and then to enter the PSA purification small air separation unit to obtain C02 0.02% (v) hydrogen and nitrogen as the feed gas for ammonia synthesis.   The choice of pretreatment ...