Razdvajanje azeotropne smjese n-pentan(1) – metanol(2) metodom promjene tlaka

undergraduate thesis

• Title (english): Separation of azeotropic mixture n-pentane – methanol by pressure swing
• Author: Dario Mirić
• Mentor: Marko Rogošić (mentor)
• Committee member: Marko Rogošić (predsjednik povjerenstva)
• Committee member: Aleksandra Sander (član povjerenstva)
• Committee member: Igor Dejanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-07-02, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Ovaj rad istražuje mogućnost separacije azeotropne smjese n‐pentan(1) – metanol(2) metodom promjene tlaka. Smisao je promjenom tlaka sustava pomaknuti azeotropnu točku prema rubu faznog dijagrama. Za predviđanje ponašanja smjese pri različitim tlakovima korištena je Stryek‐Verina modifikacija Peng‐Robinsonove jednadžbe stanja uz
Wong‐Sandlerova pravila miješanja. Kako bi se te jednadžbe mogle koristiti, trebalo je prvo iz eksperimentalnih podataka optimirati parametre tih jednadžbi pri čemu je korišten Wilsonov model koeficijenta aktivnosti i Taitova jednadžba ovisnosti gustoće kapljevina o tlaku i temperaturi. Pokazuje se kako je metoda promjene tlaka neprikladna za separaciju ovog azeotropa jer je separaciju moguće provesti samo sniženjem tlaka, a u tom slučaju smanjuje se mješljivost komponenata u kapljevitoj fazi što u konačnici dovodi do stvaranja heterogenog azeotropa kojeg nije moguće odvojiti jednostavnom destilacijom.

Abstract (english)

This work investigates the possibility to separate n‐pentane(1) – methanol(2) azeotropic mixture by pressure swing method. Essentially, by changing system pressure the azeotropic point shifts towards one side of the phase diagram. For predicting behaviour of mixture at different pressures, the Stryek‐Vera modification of Peng‐Robinson equation of state was used with the Wong‐Sandler mixing rules. In order to use those equations, the parameters had to be determined from available experimental data, which involved Wilson activity coefficient model as well as Tait equation used for the description of the dependence of liquid density on temperature and pressure. It was shown that pressure swing method was not the best option for the separation of this azeotrope because this system can only be separated by reducing the pressure. The pressure reduction will produce partial miscibility of components in liquid phase and thus create heterogeneous azeotrope making normal distillation impossible.

• Keywords: destilacija uz promjenu tlaka; azeotropna točka; Stryek‐Verina modifikacija; Peng‐ Robinsonova jednadžba stanja; Wong‐Sandlerova pravila miješanja; Wilsonov model koeficijenta aktivnosti; Taitova jednadžba
• Keywords (english): pressure swing distillation; azeotropic point; Stryek‐Vera modification; Peng‐Robinson equation of state; Wong‐Sandler mixing rules; Wilson activity coefficient model; Tait equation
• Language: croatian
• URN:NBN: urn:nbn:hr:149:605821
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-05-26 08:55:51