Journal of Chemical Engineering and Energy Materials

Process Design of vinyl chloride monomer Production by Aspen Plus

Document Type : Original Article

Author

Mohammad Moein Mehrdadian

PhD candidate in Chemical Engineering, Kurdistan University, Sanandaj, Iran

10.22034/jceem.2025.547239.1020
Abstract
The production of polymers, particularly PVC and its related copolymers, requires stringent control of operating conditions to minimize occupational exposure to VCM. In industrial practice, VCM synthesis is typically conducted in fully closed systems, which effectively reduce atmospheric emissions and worker exposure. Nevertheless, due to its high flammability, VCM vapor poses a significant fire and explosion hazard. Accidental releases under pressure can also result in frostbite because of rapid depressurization. Furthermore, the potential for long–range vapor dispersion necessitates rigorous control of potential ignition sources and strict adherence to process safety protocols.
In this study, a comprehensive and rigorously validated process model for VCM production was developed using Aspen Plus. The balanced process, which integrates both direct chlorination and oxychlorination routes, was simulated to determine an optimized, energy–efficient, and industrially feasible configuration. Detailed molecular kinetic models were incorporated for all major reactor units, accounting for both primary and secondary reaction pathways. The thermodynamic framework was based on the modified SRK equation of state, ensuring accurate vapor–liquid equilibrium representation for multi-component systems. Model validation against published plant-scale data showed excellent agreement in conversion, selectivity, and yield predictions. The developed simulation framework provides a robust foundation for future work on process optimization, heat integration, and safety analysis in large-scale VCM production plants.

Graphical Abstract

Process Design of vinyl chloride monomer Production by Aspen Plus

Keywords

Vinyl Chloride Monomer (VCM)
Process Design
Simulation
Aspen Plus
Subjects
References
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Journal of Chemical Engineering and Energy Materials
Volume 1, Issue 4
Autumn 2025
Pages 191-199

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