Effect of operating pressure on design of extractive distillation process separating DMC-MeOH azeotropic mixture


Varyemez H. S., Kaymak D. B.

CHEMICAL ENGINEERING RESEARCH & DESIGN, cilt.177, ss.108-116, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 177
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.cherd.2021.10.029
  • Dergi Adı: CHEMICAL ENGINEERING RESEARCH & DESIGN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Environment Index, Greenfile, INSPEC, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.108-116
  • Anahtar Kelimeler: DMC-MeOH, Azeotropic mixture, Extractive distillation, Pressure effect, Economic evaluation, PLUS DIMETHYL CARBONATE, VAPOR-LIQUID-EQUILIBRIA, HEAT INTEGRATION, METHANOL SEPARATION, CO2 EMISSIONS, OPTIMIZATION, SYSTEMS, COLUMN, COST
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Although dimethyl carbonate is defined as a green chemical, separation of dimethyl carbonate-methanol azeotropic mixture is an important issue for many dimethyl carbonate production processes. Extractive distillation process is considered as a favorable method for separating this mixture, but the recovery of entrainer still results in a significant loss of capital and operating costs. On the other hand, operating pressure is an important design variable for distillation columns since it has an important impact on column temperature and phase equilibrium. In this work, the effect of operating pressure is investigated for an extractive distillation process separating the dimethyl carbonate-methanol mixture using methyl isobutyl ketone as entrainer. It is observed that the increase in the operating pressure of extractive distillation column significantly decreases the amount of required entrainer flowrate. As the result, a process with an extractive distillation column operating at 10 bar reduces total annual cost and carbon dioxide emissions by 34.1% and 29.8%, respectively compared to the conventional process with an extractive distillation column operating at atmospheric pressure. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.