Which separation scenarios are advantageous for membranes or distillations?
We systematically analyze power requirements of membrane and distillation processes for binary mixtures where the desired product component is more permeable and also more volatile. We first derive a shortcut method to compare the efficiency of heat pump and steam‐driven distillations. Then, power r...
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| Veröffentlicht in: | AIChE journal 2022-11, Vol.68 (11), p.n/a |
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| creator | Chavez Velasco, Jose Adrian Tawarmalani, Mohit Agrawal, Rakesh |
| description | We systematically analyze power requirements of membrane and distillation processes for binary mixtures where the desired product component is more permeable and also more volatile. We first derive a shortcut method to compare the efficiency of heat pump and steam‐driven distillations. Then, power requirements of heat pump distillation and membrane separation are discussed. Distillation generally requires lower power when either high component recoveries are needed (at all tested product purities), or high purity product streams with modest recoveries are needed. For high purity products at modest recoveries, membranes have a potential to provide energy benefits for highly enriched feeds, especially those composed of close boiling components. Additionally, when feed concentration is moderate to high and product recovery and purity are modest, membranes are likely to show efficiency gain. For the advantageous distillation scenarios studied, the power was generally lower than the membranes by a factor of two to seven. |
| doi_str_mv | 10.1002/aic.17839 |
| format | Article |
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We first derive a shortcut method to compare the efficiency of heat pump and steam‐driven distillations. Then, power requirements of heat pump distillation and membrane separation are discussed. Distillation generally requires lower power when either high component recoveries are needed (at all tested product purities), or high purity product streams with modest recoveries are needed. For high purity products at modest recoveries, membranes have a potential to provide energy benefits for highly enriched feeds, especially those composed of close boiling components. Additionally, when feed concentration is moderate to high and product recovery and purity are modest, membranes are likely to show efficiency gain. 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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Binary mixtures Distillation energy efficiency Enriched feed Heat exchangers Heat pumps membrane Membranes Purity Separation separations Steam electric power generation |
| title | Which separation scenarios are advantageous for membranes or distillations? |
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