(87e) A New Realization of Periodic Cycled Separation
- Conference: AIChE Spring Meeting and Global Congress on Process Safety
- Year: 2016
- Proceeding: 2016 AIChE Spring Meeting and 12th Global Congress on Process Safety
- Group: Distillation Symposium
- Time: Tuesday, April 12, 2016 - 10:00am-10:30am
Separation factors and column efficiencies are compared for a column, stripping ammonia from water with air, using three different sets of internals: Conventional sieve trays, Sulzer BX gauze packings and periodically cycled trays. The periodic trays are advantageous compared to their predecessors. For different ratios of countercurrent vapor/liquid flow rates, column efficiencies are two times greater for periodically cycled columns than for columns with sieve trays. Depending upon the holdup and gas flow, the tray efficiency of a single periodic tray can be up to 300 % of an ideal stage.