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Simulation and multi-objective optimization of the dimethyl carbonate production process.

Ali Maleki1, Fatemeh Bahadori2

  • 1Faculty of Chemical Engineering, Urmia University of Technology, P.O. Box 57166-17165, Urmia, Iran.

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|October 6, 2023
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Summary

This study optimized dimethyl carbonate (DMC) production by utilizing carbon dioxide (CO2). Process simulations identified optimal conditions, achieving a 70% conversion rate, offering a practical strategy for CO2 utilization.

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Area of Science:

  • Chemical Engineering
  • Environmental Chemistry
  • Process Optimization

Background:

  • Greenhouse gases, particularly carbon dioxide (CO2), contribute significantly to global warming due to their high absorptivity.
  • Reducing atmospheric CO2 is a critical global strategy, with chemical utilization offering a practical approach.
  • Dimethyl carbonate (DMC) is a valuable chemical with potential applications in CO2 utilization processes.

Purpose of the Study:

  • To investigate the integration of carbon dioxide (CO2) into dimethyl carbonate (DMC) production.
  • To evaluate the impact of key process parameters on DMC synthesis.
  • To determine the optimal operating conditions for maximizing DMC production and CO2 utilization.

Main Methods:

  • Process simulation using Aspen HYSYS 10 to model DMC production.
  • Evaluation of parameters including temperature, residence time, feed ratio, and recycle ratio.
  • Interaction analysis and optimization using Design Expert 12 software.

Main Results:

  • DMC production increased with rising temperature.
  • A maximum conversion of approximately 8% was observed in the methanol/ethylene carbonate (MeOH/EC) system.
  • Increased residence time enhanced the effects of temperature and MeOH/EC ratio, while a higher recycle ratio proved detrimental.

Conclusions:

  • Optimal conditions for DMC production were determined: 164.7°C temperature, 0.2 recycle ratio, 139.45 min residence time, and 5.9% feed ratio.
  • These optimized parameters led to a significant conversion rate of 70%.
  • The study demonstrates a viable method for utilizing CO2 in chemical synthesis, contributing to greenhouse gas reduction strategies.