چکیده مقاله
Purpose: Toluene and butanol are widely used solvents in petrochemical, pharmaceutical, and chemical manufacturing industries Their separation from azeotropic mixtures is challenging due to close boiling points and complex phase behavior Additionally, their presence in industrial wastewater poses environmental risks, including water contamination and ecological damage Methods: This study utilized Aspen Plus software to simulate TXY equilibrium diagrams for the toluene–butanol mixture under various pressures 1, 2, 3, 5, and 7 atm Thermodynamic models NRTL and UNIQUAC were applied to predict phase behavior At 1 atm, the azeotropic point was identified at a mole fraction of 0 6495 for toluene and 0 3505 for butanol Results: As pressure increased, the boiling point difference between the two components diminished, and TXY curves converged This phenomenon is attributed to reduced enthalpy of vaporization and enhanced intermolecular interactions at high pressure The nonpolar aromatic structure of toluene and the polar hydroxyl group in butanol exhibit more similar phase behavior under elevated pressure, reducing separation efficiency Conclusion: Elevated pressure leads to convergence of thermodynamic properties and boiling points, rendering conventional distillation ineffective Alternative separation techniques such as azeotropic distillation, solvent extraction, or membrane technologies are recommended Environmental considerations should be integrated into process design to minimize solvent emissions
کلیدواژهها
نویسندگان
Abdollah Bayazian
Department of Research and development, Pouya Paykaran Pars Andish company, Qazvin, Iran
Monir Shalbafan
Department of Research and development, Pouya Paykaran Pars Andish company, Qazvin, Iran
شیوه ارجاع
Bayazian, Abdollah and Shalbafan, Monir,1404,Thermodynamic Study of Toluene–Butanol Separation Under Elevated Pressure: Environmental Insights via Aspen Plus Simulation,The 3rd National Conference on Environmental Challenges: The role of industry, mining, and society in developing green governance,Tehran
ارائهشده در
مجموعه مقالات سومین کنفرانس و نمایشگاه ملی چالش های محیط زیستی: نقش صنعت، معدن و جامعه در گسترش حکمرانی سبز19 آبان 1404 · تهران