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Mass and Energy Balances

This course teaches students how to apply the laws of conservation of mass and energy to chemical processes. Topics include material and energy balances in steady-state and dynamic systems, process flow diagrams, and the analysis of chemical processes. Students will develop the ability to model and analyze mass and energy flows in chemical systems.


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  • Process Classification
  • Process Variables Calculation (Mass, Volume, Chemical Composition, Flow Rate, Pressure, and Temperature)
  • Choosing a Basis
  • Concept of Material Balances
  • Material Balances Calculation and Degree of Freedom Analysis
  • General Procedure for Single Unit Process Material Balances Calculations
  • Solving Material Balance Problems for Single Unit Process without Chemical Reaction
  • Material Balances for Multiple Unit Processes without Chemical Reaction
  • Bypass, Purge, and Recycle
  • Chemical Reaction Stiochiometry
  • Terminology: Extent of Reaction, Excess and Limiting Reactant,  Conversion and Degree of Completion, Selectivity, and Yield
  • Species Material Balances
  • Element Material Balances
  • Combustion Reactions
  • Material Balances for Multiple Unit Processes Involving Chemical Reaction
  • Application of Material Balances in Industries

  • Equation of State for Ideal Gases and Nonideal Gases
  • The Compressibility Factor Equation of State
  • Material Balances Involving Ideal Gases
  • Material Balances Involving Nonideal Gases
  • Single Component Phase Equilibrium
  • Gas-Liquid Systems (Saturation, Condensation, Vaporization, Partial Saturation, and Humidity)
  • The Gibss Phase Rule
  • Vapor-Liquid Equilibrium in Binary Systems
  • Liquids and Gases in Equilibrium with Solids
  • Material Balances for Single and Multi-Component Phase Equilibrium

  • Forms of Energy
  • Concept of Conservation of Energy
  • Energy Balances for Open and Closed Systems
  • Steam Tables
  • Energy Balances Procedures
  • Mechanical Energy Balances
  • Elements of Energy Balance Calculations
  • Enthalpy: Effect of Pressure Changes at Constant Temperature
  • Enthalpy: Effect of Temperature Changes at Constant Pressure
  • Phase Change Operations
  • Energy Balances on Processes Involving Phase Changes
  • Humidity and Psychrometric Chart
  • Heat of Reaction
  • Hess's Law
  • Heat of Formation
  • Heat of Combustion
  • Degree of Freedom Analysis
  • Energy Balances on Processes Involving Chemical Reaction
  • Differential Equation and Integral Equation
  • Material Balances for Transient Processes
  • Energy Balances for Transient Processes

References:

  1. Himmeblau, D. M. & Riggs, J. B. (2004). Basic Principles and Calculations in Chemical Engineering (7th ed.). Prentice Hall.
  2. Felder, R. M. & Rousseau, R. W. (2005). Elementary Principles of Chemical Processes (3rd ed.). John Wiley & Sons, Inc.