| Titre : | Modeling, characteristic analysis, and optimization of ideal internal thermally coupled air separation columns (2013) |
| Auteurs : | Liang Chang, Auteur ; Xinggao Liu, Auteur ; Liankui Dai, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 44, Novembre 2012) |
| Article en page(s) : | pp. 14517-14524 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Separation column Optimization Modeling |
| Résumé : | Cryogenic air separation is currently the most widely used but energy-intensive technology for producing large quantities of oxygen and nitrogen, where cryogenic distillation consumes about 75% of the whole air separation field; however, its thermodynamic efficiency is very low. A novel structure of a full tower ideal internal thermally coupled air separation column (ITCASC) is therefore first proposed in this paper. A rigorous mathematic model and parameter analysis are then presented. Research results show that the proposed ITCASC process can yield high-purity products of both oxygen and nitrogen simultaneously and especially has a strong driving force of heat transfer, which reveals the larger energy-saving potential in the ITCASC process. Furthermore, an optimization model of the operation parameters is presented, where both the actual energy-saving potential and the ideal energy-saving potential of ITCASC are investigated. Comparative studies against the conventional cryogenic air separation column (CASC) are carried out in detail. Research results show that the proposed ITCASC process has a larger extraction rate and better energy efficiency, where the nitrogen extraction rate increases 177.94% and the unit energy consumption decreases 40% compared to the CASC process with the same product purity requirements, revealing the advantages and promising application prospect of the proposed ITCASC process. |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26620366 |
