Evaluation of the alpha function and volume translation in the Peng-Robinson equation of state using volume-translated Helmholtz energy equations

Key Points

• Volume translation improves the Peng-Robinson equation accuracy for predicting phase behavior, and the alpha function is critical for these adjustments.
• Tests reveal significant enhancement in thermodynamic calculations for various substances as compared to original formulations.
• Utilizing volume-translated Helmholtz energy equations provides a robust method for assessing fluid properties under different states.
• Findings suggest potential advancements in chemical engineering applications, with implications for more precise thermodynamic models.