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| However, reactive distillation column design requires reliable kinetic data in addition to other crucial information such as phase equilibria. Methods carried out to assess the reactive distillation process feasibility are often based on residue curve maps (RCM) for non-reactive distillation, and on reactive residue curve maps (rRCM) for reactive distillation. In addition to the four pure components, three azeotropes are the singular points of the n-propyl acetate synthesis reaction rRCM (Table 1). Two of these azeotropes (PrOH/PrOAc and PrOH/H2O) are remaining from the non-reactive RCM although two others involving reactive species (PrOAc/H2O and PrOH/PrOAc/H2O which are both heterogeneous) disappear; the last singular point of this rRCM is a quaternary reactive azeotrope. The chemical equilibrium constant value has a great influence on the liquid phase stability of this point (but not on its topological stability since it is always an unstable node): when a value of 20 (Huang et al., 2005) is used, the reactive azeotrope is homogeneous, although a value of 48.8 (Okasinski and Doherty, 2000) leads to a heterogeneous reactive azeotrope. |
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sltmac(½ð±Ò+1): ¸ÐлӦÖú~~ 2011-05-23 21:58:27
±¦MMC(½ð±Ò+21, ·ÒëEPI+1): лл 2011-05-23 22:33:27
sltmac(½ð±Ò+1): ¸ÐлӦÖú~~ 2011-05-23 21:58:27
±¦MMC(½ð±Ò+21, ·ÒëEPI+1): лл 2011-05-23 22:33:27
| However, reactive distillation column design requires reliable kinetic data in addition to other crucial information such as phase equilibria. È»¶ø£¬·´Ó¦ÕôÁóÖùÉè¼ÆÐèÒª¿É¿¿µÄ¶¯Á¦Ñ§×ÊÁÏÒÔ¼°ÆäËû¹Ø¼üÐÅÏ¢ÖîÈçÏàÆ½ºâ¡£Methods carried out to assess the reactive distillation process feasibility are often based on residue curve maps (RCM) for non-reactive distillation, and on reactive residue curve maps (rRCM) for reactive distillation.¶Ô·Ç·´Ó¦ÕôÁ󣬯À¼Û·´Ó¦ÕôÁó¹ý³Ì¿ÉÐÐÐԵķ½·¨Í¨³£ÊÇ»ùÓÚâÅÇúÏßͼ£¬ÏàÓ¦µÄ¶Ô·´Ó¦ÕôÁóÔò»ùÓÚ·´Ó¦âÅÇúÏßͼ¡£ In addition to the four pure components, three azeotropes are the singular points of the n-propyl acetate synthesis reaction rRCM (Table 1). ³ý4ÖÖ´¿ÎïÖÊÖ®Í⣬3ÖÖ¹²·Ð»ìºÏÎïÊÇÒÒËáÕý±ûõ¥ºÏ³É·´Ó¦rRCM £¨±í1£©µÄÆæµã¡£Two of these azeotropes (PrOH/PrOAc and PrOH/H2O) are remaining from the non-reactive RCM although two others involving reactive species (PrOAc/H2O and PrOH/PrOAc/H2O which are both heterogeneous) disappear; the last singular point of this rRCM is a quaternary reactive azeotrope. ¾¡¹ÜÓÐÆäËûÁ½ÖÖÓйصķ´Ó¦ÎïÖÖ(PrOAc/H2OºÍPrOH/PrOAc/H2O £¬Á½Õß¾ùΪ·Ç¾ùÏà)£¬ÆäÖÐ2ÖÖ¹²·Ð»ìºÏÎï(PrOH/PrOAc ºÍ PrOH/H2O)ÒÀÈ»±£ÁôÀ´×ÔÓÚ·Ç·´Ó¦RCMµÄÊý¾Ý¡£The chemical equilibrium constant value has a great influence on the liquid phase stability of this point (but not on its topological stability since it is always an unstable node): when a value of 20 (Huang et al., 2005) is used, the reactive azeotrope is homogeneous, although a value of 48.8 (Okasinski and Doherty, 2000) leads to a heterogeneous reactive azeotrope.»¯Ñ§Æ½ºâ³£Êý¸³Öµ¶ÔÕâµãµÄ»¯Ñ§Îȶ¨ÐÔ¾ßÓкܴóÓ°Ï죨µ«ÓÉÓڴ˵ã×ÜÊÇÒ»¸ö²»Îȶ¨µÄ½áµã£¬Òò¶ø¶ÔÆäÍØÆËÎȶ¨ÐÔûÓÐÓ°Ï죩£ºËäÈ»¸³Öµ48.8µ¼ÖÂÒ»¸ö·Ç¾ùÏà·´Ó¦¹²·Ð»ìºÏÎ¸³Öµ20ʱ·´Ó¦¹²·Ð»ìºÏÎïÊǾùÏàµÄ¡£ |
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